1Standard of Safeguard for Mechanical Equipment and Devices 
 
Chapter 1   General Rule 
 
Article 1  
This standard is enacted pursuant to the provision s of Paragraph 5 of Article 3 of Labor Safety 
and Health Act (hereinafter referred to as the Act). 
 Article 2  The equipment and devices defined in the Article 7 of the Enforcement Rule of this standard shall 
be subject  to this standard. 
The requirements of construction, performance a nd safeguard for those equipment and devices 
mentioned in the preceding paragrap h shall not below this Standard. 
 Article 3  The terminologies used in this Standard are defined as follows: 1. Quick stop mechanism: A mechanism which can automatically stop the motion of the 
slide-block, cutting tool or bumping hammer (hereinafter call ed the slide-block(s)) upon a 
hazardous or an abnormal situation of th e punching/shearing machine is detected. 
2. Emergency stop device: A device which can urge ntly stop the motion of the slide-block(s) 
manually, when a hazardous or an abnormal s ituation of the punching/shearing machine has 
existed. 3. Removable touch preventive device: A devi ce which can prevent one from touching the 
blade of the cutting tool by auto matically opening/ closing of th e protective cover of the manual 
planer in company with feed ing of the working pieces.  
   
Chapter 2   Power-driven Punching/Shearing Machinery 
 
Section 1   Safety Enclosure 
                 
Article 4  The power-driven punching and shearing machiner y (hereinafter called the punching/shearing 
machinery) shall be equipped with safety enclos ure, safety die (hereinafter called the safety 
enclosures), or shall service as a de dicated punching/shearing machines or an 
automatic punching/shearing machines for specific purpose. Nevertheless, the above requirement 
will not applicable to those equipped with a m echanism which is capable of preventing hazards  2induced by the slide-block(s). 
Unless any of the following circumstances exists , those punching/shearing machines which have 
difficulty in providing the said sa fety enclosures due to the natu re of their operation, shall be 
equipped with one of the safety devices specified under Article 6: 
 1. To operate the machine with one hand us ing dedicated hand tools, while the other 
hand protected by safety enclosur e, shielding plate or other eq uivalent protective measures. 
2. To load the working pieces or unload th e finished products with two hands using 
dedicated hand tools.    In case a potential hazard may be  concerned, induced by prime motors, gears, shafts, turning 
wheels, driving belts, and other components of  the punching/shearing machinery specified under 
the preceding Paragraph 1, the gua rd cover, guard ring, guard sleev e, barrier guard, guard net, 
shielding plate, or other proper measures to im pede touching of the dangerous points shall be 
provided . 
 
Article 5  The safety enclosures specified under the precedi ng Article shall possess the function capable of 
preventing operator’s body parts from intruding into the dangerous  boundary of the motion range 
of the slide-blocks, and shall be in co mpliance with the following requirements: 
1. The safety enclosure: The construction of the safety enclosure shall be capable of 
preventing operator’s fingers from passing throug h the said safety enclosure, or touching the 
dangerous boundary from the outside. 2. Safety die: The clearance of  the following components of th e said safety die shall be 
below 8mm: 
(1) The clearance between th e upper and the lower dies at upper dead center location. 
(2) In case of the stripping plates being us ed, the clearance between the upper and the 
lower stripping plates at upper dead center location. 
(3) The clearance between the guide rod and the bearing bush. 
3. Dedicated punching/shearing machinery for special purpose: The construction of the 
said machinery shall be capable of preventing operator’s body parts fr om intruding into the 
dangerous boundary. 4. Automatic punching/shearing machinery: The construction of the sa id machinery shall 
be capable of providing an automatic function for material feeding, material processing, 
and product discharging.  
   3Section 2   Safety Devices 
 
Article 6  The safety device of the automatic punching/sh earing machinery shall contain the following 
design features: 1. Protective type safety device: This type of safety devices sh all be capable of eliminating 
the concern that the operator’s body parts may in trude into the boundary of the dangerous area, 
when the slide-block(s) is in motion. 2. Two- hand operating type safety device: 
(1) Safety singular stroke ty pe safety device: When the starting button/ control handle 
( hereinafter called buttons) is actuated, this  safety device shall be capable of stopping 
the movement of the slide-block(s) before the operator’s hand reach the boundary of the 
dangerous area, after the opera tor releases said buttons. 
(2) Two-hand starting type safety device: While the slide-block(s) in motion, the 
safety device shall be capable of prev enting operator’s hands from reaching the 
dangerous boundary whenever the push bu ttons are released by the holding hands. 
3. Sensing type safety device: While the slide-bl ock(s) is in motion, this safety device shall 
be capable of stopping the motion of  the said slide-block(s) by se nsing that any of the operator’s 
body parts is approaching the boundary of dangerous area. 
4. Pullout/sweep type safety device: This de vice shall be capable of pulling/ sweeping the 
operator’s body parts out of the dangerous area by following the action of the slide-block(s), once 
the said operator’s body part(s) intrud e into the dangerous boundary.   
   
Article 7  The safety devices of the punching/shearing machin ery shall be in complia nce with the following 
requirements: 1. The safety devices shall be featured to be ab le to compatible with the types, capacities, 
strokes per minute, stroke displacements a nd operating modes of each specific punching / 
shearing machinery. 2. Both of the two-hand operating type and th e sensing type safety devices shall be 
featured to be able to compatible with the stop function of each sp ecific punching / shearing 
machinery.  Article 8  The stop function of the two-hand ope rating type and the sensing type  safety devices specified in 
the preceding Item 2 shall meet  the following characteristics:  41. For both the safety single stroke t ype and sensing type safety devices,  
D × 1.6 ( T BlBÐTs ), where 
 
D : The distance, expressed in millimeter(mm), either between the push buttons 
and the dangerous boundary for the safe si ngle stroke type safety device; or 
between the sensing zone and the dangerous  boundary for the sensing type safety 
device 
T Bl B: The actuation time elapsed either from th e time when operator’s finger leaves the 
push buttons until the time when the emer gency shut-down mechanism begins to 
take action by the single stroke type safety device; or from the time when 
operator’s finger intrudes into the sensing zone until the time when the emergency shut-down mechanism begins to take act ion by the sensing type safety device. 
T
Bs B: The response time , expressed in millisecond (ms), elapsed from the time when the 
emergency shut-down mechanism begins to  take action until the time when the 
slide-blocks have stopped. 
         
2. Two-hands active type safety device : 
D × 1.6T Bm 
 
D : The distance, expressed in millimete r(mm), between the push buttons and the 
dangerous boundary. 
T Bm B: The maximum response time , expressed in millisecond (ms), elapsed from the 
time when operator’s hand leaves th e push button until the time when the 
slide-blocks reaches the lower dead point. 
T BmB= shaft crank    theof revolution onefor  required time
revolutionper  points engaged of No.1
2/1 × +⎥⎦⎤
⎢⎣⎡ 
 
Article 9 The protective type safety device shall be in compliance with the following 
requirements: 
1. Except for “inch” motion, the safety de vice shall have a mechanism capable of 
preventing the slide-blocks fr om moving as long as the sa id safety device has not 
been closed completely, and also capabl e of preventing the said safety device 
from re-opening once the s lide-blocks is in motion. 
2. The limit switch for controlling the motion of the slide-blocks shall have measures 
to prevent operator’s body parts, material s, and those objects other than protective 
device from touching the said slide-blocks.  5Article 10 The two-hand operating type safety device shall be in compliance with the following 
requirements: 
1. A single stroke safety mechanism sha ll be provided except for those punching/ 
shearing machinery equipped with a si ngle stroke one stop safety device. 
2. Whenever the slide-blocks are in moti on, this single stroke type safety device 
shall have a mechanism to be able to st op the slide-blocks af ter the push buttons 
have been released, and before the op erator’s hands may possibly reach the 
dangerous boundary. 
3. The two-hand initiative type safety de vice shall have a mechanism to enable the 
slide-blocks to reach lower dead poin t after the push buttons have been 
released and before operator’s finge rs may possibly reach the dangerous 
boundary. 
4. The safety device shall have a mechan ism to prevent the slide-blocks from 
moving when both hands do not pus h the buttons simultaneously. 
5. The safety device shall have a mechanis m to prevent itself from re-initiating 
operation, as long as the single stroke pus h buttons have not released by both 
hands.  
6. The distance between the edges of two push buttons shall be at least 300 
millimeter. However, in case said push buttons have been provided with protective cover, shielding pl ate, or other barrier to o ffer an equivalent safety 
feature to prevent their false action by  single hand and body’s other parts, the 
above-mentioned distance can be reduced. 
7. If a push button box is used for installa tion of the push buttons , the said buttons 
shall not protrude from th e top surface of the box. 
8. If the push buttons are to be built in the punching/ shearing machinery themselves, 
said push buttons shall not protrude from the surface of the said machinery.         
  
Article 11 When a sensing type safety device is adopted, it shall be of ph otoelectric type one or 
a similar one with equivalent  or superior performance. 
         Article 12 The photoelectric type safety devi ce shall be in compliance with the following 
requirements: 
1. The photoelectric type safety device of  the punching / shearing machinery shall 
be capable of stopping the slide-blocks when ever an interruption of the light beam 
due to intervention of operat or’s body parts is detected by the said safety device. 
2. The light emitters and re ceivers of photoelectric t ype safety device of the  6punching / shearing machinery shall be able  to effectively perform their function 
within the whole distance equal to th e sum of the adjustment length of the 
slide-blocks and the cycle st roke length (simply referred to as preventive height). 
The said whole distance will be considered  as 400 mm when it is beyond 400 mm. 
3. The light emitters and recei vers mentioned in the preceding Item 2 shall provide 
two or more light beams. Besides, the separation between the light beams is 50 
mm or less; while the separation between  two light beams may be of 70 mm, 
provided the horizontal distance between the vertical plane of light beams and the 
boundary of dangerous area exceeds 500mm. 
4. The height of the light beams of the light emitters and receivers of the sensing 
type safety device for the shearing mach inery, measured from above the shearing 
bed, shall be less than 0.67 times the hor izontal distance between the vertical 
plane of light beams and the boundary of dangerous area. Should the said distance exceeds 500 mm, it will remain to be considered as 500mm. 
5. In case the horizontal distance between th e vertical plane of light beam and the 
boundary of dangerous area exceeds 270 mm, more than one light beam shall be 
provided by the light emitters and receiv ers mentioned in the preceding Item 4 
between the said light beam and the tool. 
6. If the incandescent bulbs are not selected  for use as the light source for the light 
emitter of photoelectric type safety de vice of the punching / shearing machinery, 
the design of the light receiver shall be featured to be not sensible to the light from 
any other light sources except for the light from its own light emitter. On the other hand, if the incandescent bulbs are selected for use as the light source for the light 
emitter, the design of the light receiver shal l be featured to be not sensible to the 
light from the normal lighting bulbs, rate d at a voltage of 110V and a consuming 
power of 100W, located at a distance more  than 50mm from the light beam.    
 Article 13 Pullout type safety device shall be in compliance w ith the following requirements: 
1. When the pull back strap is provided, the pull back range shall be adjustable, 
and its range shall be at least ha lf of the working bed’s depth. 
2. The pull back strap shall be made of a s ynthetic fiber with its diameter at least 4 
mm. The breaking load for those pull back straps equipped with adjustable fittings shall be 150 kg as a minimum. 
3. The knuckle joint belts shall be made of  leather or other equivalent material. 
The connecting parts of the said belts sh all be able to withstand at least 50 
kilograms of the static loading.   7Article 14 The sweep type safety device shall be  in compliance with the following requirements: 
1. The length and the amplitude of th e sweep arm shall be adjustable. 
2. The sweep arm shall be equipped with a pr otective plate to ensure the safety of 
operator’s hands. 
3. The dimensions of the sweep type safety  device specified in the preceding Item 2 
are as follows: 
(1) Width: The width of the protective plat e shall be at least half of the metal 
die width. However, when the metal die width is less than 200 mm, the 
width of protective plate shall be 100 mm. 
(2) Height: The height of the protective pl ate shall be at leas t as same as the 
stroke length, or shall be 300 mm in  case the stroke length exceeds 300 
mm. 
(3) Amplitude: The amplitude of the sweep  arm shall be at least as same as 
the width of the metal die. 
4. A design feature shall be provided to enable the sweep arm and the protective 
plate to slow down the impact forces , upon their being touched by operator’s 
hands or body parts.   
 Article 15 The safety device, mechanical parts, electrical parts, steel wires, switches and other 
parts shall be in compliance with the following requirements: 
1.  The main body, linkage rings, component  materials, control levers and other 
major mechanical parts sh all have enough strength. 
2.  Metal parts:  
(1) The metal parts which are subject to acting forces shall be made of 
S45C class steel as per CNS 3828 for “Carbon Steel for Machine Structural Use”, or shall be made of materials having equivalent or 
superior mechanical properties. 
(2) The surface of the metal parts which are subject to acting forces shall be 
treated by the quenching or annealin g process to obtain hardness in 
between Rockwell C45 and Rockwell C50. 
3. Steel ropes:  
(1) The material used for making the st eel ropes shall meet the requirements 
as per CNS 10000 for “Wire Ropes for M echanical Control Use”, or shall 
have equivalent or superior mechanical properties. 
(2) The steel ropes shall be securely co nnected with the slide-blocks, control 
levers and other similar parts by using clamping devices such as  8rope clampers, clamping pliers and etc. 
4. In case there exists a concern that loos ening of the bolts and nuts may cause the 
safety device to malfunction, or cause the pa rts/ fittings to be fallen off, a design 
feature for preventing the said bolts a nd nuts from loosening, as well as for 
preventing the pins in the chain from falling off shall be provided. 
5. The relays, limit switches and other majo r electrical parts shall have sufficient 
strength and endurance to ensure the de signated function of the safety devices. 
6. The indicating lights shall be provided for the safety devices equipped with 
electric circuit to show the action status of the said sa fety devices and to identify 
the malfunction status of the relay and the other electrical circuits. 
7. The mounting portion of the electrical components including relays, 
transistors, capacitors and resistors shall have an anti-vibration capability. 
8. The electrical circuits of the safety device shall have a safety feature to be able to 
prevent the slide-blocks from unexpect ed moving, in case a malfunction of the 
electrical parts (such as relay, limit switch and etc.) occurs.  
9. The voltage of the operating electr ical circuit shall be below 160V. 
10. The exterior of the electri cal cable shall be in complia nce with the requirements as 
per CNS 6556 for “600V Grade Polyvinylchloride Insulated and Sheathed Portable Power Cabl es”, or shall meet the equivalent or 
superior requirements for insulation, anti -oil, strength and endurance capabilities. 
11. Switch devices: 
(1) The push button type switch shall be capable of being used to select the 
switched position separately. 
(2) Each selected position shall be maintained securely by proper means.  (3) An evident indication shall be provided to show the operating status of 
the safety device at each selected position. 
 
Section 3   Mechanism and Devices 
 
Article 16 The punching/shearing machinery whic h has been equipped with one of the following 
switches shall have a safety feature in compliance with requirements as specified in the preceding Article 4, at any switched operation condition:  
1. A stroke switch to be used for contro lling the operation of the said machinery 
under the continuous stroke, single stroke , safety single stroke or inching 
motion control modes. 
2. An operation switch to be used for cha nging the operation of the said machinery  9from two-hands to one hand control mode, or from two-hands to foot 
pedal control mode. 
3. A control switch to be used for changing the operation of the said machinery from 
multiple control mode to single control mode. 
4. A safety switch to be used for setting th e operation of the safety device under “on” 
or “off” mode. 
 
Article 17 The switches used for controlling the stroke a nd operation modes of the punching 
machinery shall be in compliance with the following requirements: 
1. When a key is required to actuate the switching operation , the said key shall be 
able to be pulled out at any switched position, unless one of the following conditions exists: 
(1) The safety feature of the punching machinery meets one of requirements as 
per Paragraphs 1 through 3 of the preceding Article 6 under any 
selected condition. 
(2) The switching action is accomp lished by using a preset code. 
(3) The switch device has other equi valent safety control function. 
2. Each selected position shall be maintained securely.  3. An evident indication shall be provided to  show all kinds of the strokes and the 
operation methods. 
 
Article 18 The punching machinery shall ha ve a single stroke one stop mechanism. 
 Article 19 The punching machinery shall have  a rapid stop mechanism, unless one of the 
following conditions exists: 
1. The positive acting type clutch has been adopted. 
2. The measures for preventing the operato r’s body from intruding into the boundary 
of the dangerous area, has been provided. 
3. The measures capable of eliminating th e concern that the op erator’s body parts 
may intrude into the boundary of the dangerous area during the motion of the 
side-blocks, has been provided. 
After actuation of the said rapid stop m echanism, the punching machinery shall 
have a safety feature to prevent the slide- blocks from moving before restart of the 
said machinery. 
 Article 20 A manual emergency stop mechan ism shall be provided for those punching  10machinery built with the rapid stop devices , so that the slide-blocks can be 
stopped immediately by manual operati on in case an accident happens. 
Whenever the emergency stop device ha s been actuated, the punching machinery 
shall have a mechanism to prevent th e slide-blocks from action, until the 
slide-block(s) returns to its  originally starting position. 
  
Article 21 The push button used for actuati ng the emergency stop device of the punching 
machinery shall be in compliance with the following requirements: 
1. The push button shall be of protruded type in red color. 2. The push button shall be located in the operation region. 3. The push button shall be respectively lo cated on both the front and back surfaces 
of side plate of the straight arm type  punching machinery and other similar type 
machinery.  
 
Article 22 The inching motion mechanism shall be  built in the punching machinery that have 
been equipped with a rapid stop mechanism  
 Article 23 A safety shielding block shall be pr ovided for the punching machinery to prevent the 
slide-blocks from unexpected falling. In a ddition, an interlocking mechanism shall be 
provided to prevent the slide-blocks from action, whenever the safety shielding block 
is in use. However, if the following punchi ng machinery have difficulties in adoption 
of the said safety shielding block, the safety  bolt, safety lock, or other devices with 
equivalent safety feature may  
be utilized:  
1. The mechanical type folding machinery. 2. The mechanical punching machinery (excluding the mechanical type folding 
machinery) with the length of each si de of its working bed less than 1,500 
millimeters, or with the height of  the die less than 700 millimeters.  
The above-mentioned safety bolts and safety locks shall be in compliance with the 
following requirements: 
1. The safety bolts shall be provided in  the operation region of the mechanical 
punching machinery. 
2. The safety locks shall have the capability to shut the main motor of the mechanical 
punching machinery off from the power source. 
 Article 24 In order to prevent the slide-blocks from unexpected moving, an outer cover shall be  11provided for protecting the pedal switch or  pedal plate from being inadvertently 
touched. 
            Article 25 The electrical syst em of the punching machinery sh all be in compliance with the 
following requirements: 
1. The indicating light or other equivalent  indicating devices shall be provided to 
show the operating status. 
2. The mounting portion of the electrical components including relays, 
transistors, capacitors and resistors, or  the mounting portion of the control panel, 
operation panel and the main body of th e punching machinery shall have the 
a n t i - v i b r a t i o n  c h a r a c t e r i s t i c s .                                                  
3. When the power is restored after black out , the electrical circuit of the main motor 
shall have a safety feature to prevent said motor from being energized before 
restart of said motor. However, the above  requirement may not be applicable, if a 
mechanism for preventing the operator’s body from intruding into the boundary of 
the dangerous area has been provided. 
4. The electrical circuits for control and ope ration shall have a safety feature capable 
of preventing the slide-blocks from un expected moving, in case an event of 
malfunction of electrical parts ( such as relay, limit switch and etc.), or drop of 
voltage, or blackout of electricity occu rs. However, the above requirement may 
not be applicable, if a mechanism for preventing the operator’s body from 
intruding into the boundary of the dangerous area has been provided. 
5. The voltage of the operating electr ical circuit shall be below 160V. 
6. The exterior of the electri cal cable shall be in complia nce with the requirements as 
per CNS 6556 for “600V Grade Polyvinylchloride Insulated and Sheathed Portable Power Cabl es”, or shall meet the equivalent or 
superior requirements for insulation, anti -oil, strength and endurance capabilities. 
 Article 26 The mechanical system of the punchi ng machinery shall be in compliance with the 
following requirements: 
1. The compressive type spring guided with rod, tube or etc. shall be adopted, in case 
there is a concern that the slide-blocks  may be unexpectedly actuated resulting 
from a broken or loosen spring. 
2. In case there is a concern that looseni ng of the bolts, nuts and bushings may cause 
the slide-blocks to be unexpectedly actuate d, or cause the parts/ fittings to be fallen 
off, the said bolts, nuts, bushings or ot her parts shall have a anti-loosening design  12feature. 
3. In case there is a concern that loos ening of the dowel pins may cause the 
slide-blocks to be unexpectedly actuated, or ca use the parts/ fittings to be fallen off, 
the said dowel pins shall have a anti-loosening design feature.  
 
Section 4  Mechanical Punching Machinery 
 
Article 27 The main driving motor of the mechan ical punching machinery shall not be able to be 
actuated, as long as the clutch set is e ngaged and the slide-blocks is in an 
idle condition.  
However, the above requirement may not  be applicable, if a mechanism for 
preventing the operator’s body from intrud ing into the boundary of the dangerous 
area has been provided. 
 Article 28 The stroke numbers of the mech anical punching machinery that have been 
equipped with a clutch set assembled by usi ng the sliding pins or rolling keys shall 
not exceed the value as specified under the attached Table 1. 
 Article 29 The material of the clutch set, assemb led with the sliding pins or rolling keys, of the 
mechanical punching machinery shall meet the requirements as per the national standards specified under the attached Table 2, or have equivalent or superior 
mechanical characteristics. 
 Article 30 The heat treatment method and th e surface hardness of the clutch set of the 
mechanical punching machinery that have a dopted the sliding pins  or rolling keys 
shall meet the requirements as specifie d under the attached Table 3, based on the 
specific category of the mechanical punchi ng machinery and the specific component 
of clutch. 
 Article 31 The pneumatic type clutch of th e mechanical punching machinery shall have a 
spring-actuated departing type mechanism, or have an equivalent or superior safety 
feature. 
 Article 32 The clutch set (equ ipped with sliding pins) of the mechanical punching machinery 
shall have a stop block capabl e of stopping rotation of the crank shaft before the cam 
( which is used for actuating the function of the clutch) exceeds the range of the  13sliding pins( used for pressing the clutch back).  
The bracket of the clutch mentioned in the preceding Paragr aph shall have the 
dowel pins for position fixing purpose. 
The cam used for actuating the function of the clutch shall have a mechanism to 
prevent the clutch from being presse d back without actuation of the cam. 
The strength of the mounti ng portion of the cam used fo r actuating the function of 
the clutch shall be adequate to withstand the impact forces from the cam itself. 
 Article 33 The friction type clutch shall be a dopted for use with the mechanical type folding 
machinery.  
 Article 34 The brake device set of the mechan ical punching machinery which are equipped with 
eccentric (crank) shafts (hereinafter referre d to as  crank type punching machinery) 
shall have a construction feature capable of  having its braking surfaces free from 
intrusion of oil. However, the above requi rement may be exempted for those crank 
type punching machinery which are equipped with a wet type brake mechanism.                 
 Article 35 The brake device set of the crank ty pe punching machinery shall be equipped with a 
spring fastening type mechanism or other devices having equivalent or superior 
safety feature, in case the said brake devi ce actuates the clutch set by means of air 
pressure.  
For all crank type punching machinery excep t for those specified in the preceding 
Paragraph, the brake device shall be that othe r than the belt type. However, the above 
requirement may be exempted for those crank type punching machinery excluding 
the mechanical type folding machinery, and also having its pressure capacity below 
100 tons. 
 Article 36 A indicator or othe r devices having the equivalent indication function to be able 
to clearly show the turning angle of the crank shaft sha ll be provided at an evident 
location for the crank type  punching machinery. However, the above requirement 
may be exempted, if a mechanism for preventing the operator’s body from intruding into the boundary of the dange rous area has been provided. 
 Article 37 The stopping angle of the crank (eccentric) shaft of the mechanical punching 
machinery equipped with the sliding pin type or the rolling type clutch set shall be 
within 10 degrees. However, the above re quirement may not be applicable, if a  14mechanism for preventing the operator’s body from intruding into the boundary of 
the dangerous area has been provided. The stopping angle mentioned in the preceding Paragraph is the angle  
 Article 38 An over limit operati on monitoring device shall be provided for the crank type 
punching machinery, when its turning speed  is below 300 revolutions per minutes. 
However, this requirement may be exempt ed, if the said punching machinery is not 
only legally allowed not to be equipped with  the rapid stop mechanism, but also have 
a safety mechanism to prevent the operat or’s body parts from intruding into the 
boundary of the dangerous area. The above-mentioned over-limit monitoring device is intended to be used for initiating an instruction to actuate the rapid stop mechanism, when the 
eccentric shafts can not stop at the preset stop position. 
 Article 39 The mechanical punching machinery that have adopted the pneumatic/ 
hydraulic control type clutches or brak es shall be equipped with the following 
electrical solenoid valves: 
1. The multiple action type electrical so lenoid valves. This requirement may be 
exempted, if the mechanical punching machinery has a safety mechanism to 
prevent the operator’s body parts from  intruding into the boundary of the 
dangerous area. 
2. The normal close type electrical solenoid valves. 3. The pressure recovery type electrical so lenoid valves (for pne umatic control use). 
4. The spring recovery type electrical so lenoid valves (for hydr aulic control use). 
 Article 40 The mechanical punching machinery sp ecified in the preceding Article shall have a 
safety mechanism to prevent the air pressure / hydraulic pressure of the clutch/ brake 
from exceeding their limits, and also have a mechanism to shut down the action of the 
slide-blocks automatically in case the air pressure or the hydraulic pressure falls 
below preset pressure. 
 Article 41 A device for preventing the slide-bloc ks from exceeding the upper and lower limits of 
the adjustment shall be provided for the mechanical punching machinery whose 
slide-blocks is adjusted by using the electrical motor. 
 Article 42 The balancer of the slide-blocks of the mechanical punching machinery shall be  15in compliance with the following requirements: 
1. The spring type balancer: A safety mech anism shall be provided to prevent its 
parts from scattering, if it happens that the spring and other parts are broken. 
2. The pneumatic type balancer:  
(1)  A safety mechanism shall be provided to prevent its parts from been scattered, 
if it happens that the pist on and other parts are broken. 
(2)  A safety mechanism shall be provided to maintain the slide-blocks and the 
accessories at any position on its stroke, and to automatically shut down the action of the slide-blocks in case the air pressure falls below the preset pressure. 
 Article 43 As long as the stroke numbers is be low 150 per minutes and the pressure capability is 
below150 tons, the mechanical punching machinery that have adopted the positive action type clutch and equipped with the pedal switch or pedal plate shall have a 
safety mechanism to prevent the operat or’s body parts from intruding into the 
boundary of the dangerous area, or a rapi d stop mechanism shall be provided as a 
option.  
 Article 44 The mechanical punching machinery that have adopted the positive action type clutch 
shall not allowed to be equipped with the rapid stop mechanism as long as the stroke numbers is above150 per minutes, or the pressure capability is above150 tons. 
 
Section 5  Hydraulic Punching Machinery 
 
Article 45 After the hydraulic pump has been started, the hydr aulic punching machinery shall 
have a safety feature capable of restraining the slide-blocks from moving until the hydraulic punching machinery is  actuated for operation. 
 Article 46 The rapid stop mech anism of the hydraulic punching machinery shall be actuated by 
the slide-blocks when it gets to the ma ximum falling velocity. The inertia falling 
distance of the slide-blocks shall not  exceed the value specified under the 
attached Table 4. 
 Article 47 The safety shielding block of the hydraulic punching machinery shall be capable of 
withstanding the weights of the slide-blocks and its upper die. 
 Article 48 The solenoid valves of the hydrauli c punching machinery shall be of normal close  16and spring recovery type.  
Article 49 The hydraulic punching machinery sh all have a safety device to prevent the 
hydraulic fluid from overpressure. 
 
Chapter 3`  Hand-feed Planer 
 
Article 50 Except for portable type, the hand-fe ed planers shall have a protective device to 
prevent the operator from touching th e cutting blade as per the following 
requirements. However, the above requirement s may be totally or partially exempted, 
in case the said protective device has an equi valent or superior pr otective feature as 
approved by the Inspection Organization: 
1. The coverage of the protective cove r shall be extended beyond the range of 
the work piece to be cut.  
2. Sufficient mechanical strength to pr event the protective device from any 
bulking or twist deforma tion shall be provided. 
 3. Bolts and pins used at hinging portion of the movable type contact preventive 
device shall be provided with anti-loosening mechanism. 
 
4. Except for those planers using fixed cutting width for cutting multiple work 
pieces, the movable type protective devices  shall be used to protect against 
touching the cutting blades. However, th is requirement may not be applicable 
to those protective devices which are used for preventing against touching 
the cutting blades of the cutting tool sp indle of the hand-feed  planner that are 
dedicated for right angle cutting purpose.  
 
The protective device for preventing against touching the cutting blades shall be so 
installed to keep the gap between the bottom of its guard cover and the surface of the 
work table on the work piece’s f eeding side no greater than 8 mm. 
 
Article 51 The hand-feed planer shall be equipped with a braking device which is  capable of stopping 
the cutting tool axle in  rotation when the electrical power is shut off. However, the above 
said requirement may be waived, in case the cu tting tool spindle can be stopped turning in 10 
seconds when the electrical power is shut off, or  a portable hand-feed plan er using a series type  17motor with single phase, wi nding rotor is adopted.  
 Article 52 A device used for fastening the cu tting tool spindle sh all be provided for the hand-fed planer.  
 Article 53 A power shut-off device for the hand-feed planer sh all be located where it can be actuated by the 
operator without leaving fr om his working position.  
The said power shut-off device shall be easy of ope ration. In addition, it shall also have a safety 
feature capable of preventing the hand-feed planer from being accidentally actuated by 
inadvertent contact of the button or due to  vibration resulting from other means. 
 Article 54 Except for those portable hand-feed pl aners, the work table on the fe ed-in side of the planer shall 
be constructed to be adjustable for keeping the gap between the said tabl e and the front tips of 
the cutting tool less than 3 mm.  
 Article 55 Except for the portion of the cutting tool spindle, which needs to be exposed for cutting operation as required, protective covers sh all be provided for the pulleys, belts and other rotation parts, 
when a danger resulting from contact with the same in rotation may be concerned,  
 Article 56 The mechanical properties of the material used fo r the cutting tool of th e hand-feed planer shall 
meet or exceed the requirements as follows: 1. Cutting blade: to be in compliance with the requirements as specified per CNS 2904 for 
“SKH2 grade High speed tool steels .”  
2. Cutting shank: to be in compliance with th e requirements as specified per CNS 2473 for 
“Rolled steels for general structure” or as specified per  CNS 3828 for “ Carbon Steels for 
Machine Structural Use.”  
 Article 57 The cutting blades shall be fastened on the cutting tool spindle of the hand-feed planer using the 
methods as follows: 1. For “A” (thick) type cutting blade, at least one socket of the fastening bores shall be used as 
specified per CNS 4813 for “ Planer Knives for Woodworking Machines” .  182. For “B” (thin) type cutting blade, the fastening slots or the cross section of press plates of the 
spindle shall be in wedge or the sim ilar shape as specified per CNS 4813 for “ Planer Knives 
for Woodworking Machines” . 
 Article 58 The cutting tool spindle of the hand-feed pl aner shall be of the cylindrical shape. 
       
      Chapter 4  The Circular Sawing Machinery for Woodwork 
 
Article 59 The material, installation method, and flange of the circular sawing machine for woodwork 
(hereafter referred to as circular  saw) shall be in compliance w ith the requirements as follows: 
1. Materials: The mechanical properties of the materials used for the specific blade type 
and the component of the circular saw blade shal l meet or exceed the requirements as listed in 
the attached Table 5.  
2. Fastening methods: 
a) The flange specified in the following Item 3 shall be adopted except for those 
multi-blade/ complex type circular saws that are equipped with dedicated fittings. 
b) The flange on the fixed side shall be fastened  to the spindle shaft by means of shrinking fit, 
press-in methods, or by use of pins, bolts and other measures. 
c) The clamping nuts fastened on the circular saw shaft shall have a characteristic feature of 
not being able to be rotated freely. 
d) The bolts and nuts used for fastening the flange  shall have an anti-loo sing feature to prevent 
themselves from loosing induced by the braking action of the brakes. 
3. Flange of circular saw: 
a) The flange shall have suffi cient yield strength without defo rmation per the requirements 
specified in CNS 2472 for No. 2 cast iron of “ Gray Iron Castings ”. 
b) The flange diameters both on the fixed side  and the movable side shall be equal.  
 
Article 60 
The circular saw shall be equipped w ith the following protective devices: 
1. An anti-kickback protective device for the ci rcular saw (hereafter referred to anti-kickback 
protective device) shall be pr ovided. However, this requireme nt is not applicable to 
those circular saws for cross-cutting purpose, or the kickback action will not cause any concern of hazard.  
2. The anti-contacting protective device for the circ ular saw (hereafter referred to anti-kickback  19protective device) shall be pr ovided. However, this requireme nt is not applicable to 
those circular saws for lumber-cutting purpose, and those equipped with the 
automatic feeding facility. 
 
Article 61 
The installation of the inserting plate for the anti -kickback protective device (hereafter referred to 
the inserting plate) and the t eeth contacting preventive device shall be in compliance with the 
following requirements: 1. The inserting plate and the saw teeth contacting preventive device shall normally keep the 
plane containing the longitudina l center line of th e longitudinal cross section, which is 
parallel with its lateral plane, and the plan e containing the longitudi nal center line of the 
longitudinal cross section of the ci rcular saw blade, which is /par allel with its lateral plane in 
the same plane.  
2. The circular saw for woodwork shall keep the gap between the inserting plate and the front 
end of the corresponding circul ar saw teeth within 12 mm. 
 
Article 62 
Except for those circular sawing machines listed  below, a brake device  shall be provided for 
stopping the spindle in rotation upon  shut off the power source: 
1. The circular saw spindle can be stopped from  rotating within 10 seconds after the power is 
shut off. 
2. The portable circular saw machine utiliz es a single-phase series type motor. 
3. The circular sawing machine which is equipped  with an automatic f eeding device, has the 
saw blades built in its main body, or no concer n about other danger caused by contact exists . 
4. The tenoning machine or multiple spindle tenoning machine.   
 
Article 63 
The circular saw machine shall have a devi ce to secure the saw spindle to avoid a 
hazard caused by rotation of the saw spindle during change of the blades. 
 
Article 64 
The power shut off device for the circular saw machine shall comp ly with the requirements as 
follows: 1. The power shut-off device shall be located wh ere it can be actuate  corresponding value per 
the diameter of the circular saw as specified in the attached Table 6.  
1. d by the operator without leaving from his working place.   202. The power shut-off device shall be easy of operation. In addition, it shall also have 
a construction feature capable of preventing the circular saw from being accidentally 
actuated by inadvertent contact of the button or due to vibration resulting from other means. 
 
Article 65 
Except for the portion which is  necessary for sawing operati on, protective covers shall be 
provided for the circular saw, gear wheel, pulle y, belts and other rotation parts, when a danger 
resulting from contact by accident during rotation may be concerned. 
 
Article 66 
The tilting table device for the tilting type universal  circular sawing machine shall be of a spiral 
type, or it shall be so cons tructed to eliminate the con cern for tilting by accident. 
 
Article 67 
A plain table shall be provided for the por table type circular sawing machine.  
The distance between the outside ends of th e above-mentioned table on the wood sawing side, 
and the circular saw teeth shall be  kept to be no less than 12mm. 
 Article 68 The inserting plate shall be in complia nce with the requirements as follows: 
1. Materials:  
The materials used for the inserting plate sh all comply with the standard CNS 2964 for “ Carbon 
tool steels” No.5 materials or other materials having equiva lent or superior mechanical properties. 
2.Configuration:  
a) The configuration of the inse rting plate shall be able to keep the gap within 12 mm between 
the standard sawing table, as specified per Ar ticle 116, located along more than two- thirds 
(2/3) of the skew teeth portion of the circular saw blade, and the front ends of the teeth edge 
of the circular saw. 
b) The blade configuration of the cross secti on of the inserting plat e shall be shaped to 
minimize the  resistance force against th e feeding of the work  piece during sawing. 
   
3. The width of the inserting plate with its one end fixed (hereafter re ferred to as the sickle type 
inserting plate), as specifi ed per Article 116, shall be  in no case less than the 
value corresponding to the diameter of the circul ar saw as specified in the attached Table 6. 
4. The width of sickle type inserting plate lo cated along two-thirds (2/3) of the skew teeth 
portion of the circular saw blade  shall be in no case less than one thirds (1/3) of the 
value corresponding to the  diameter  of the circular saw as speci fied in the attached Table 6.  215. The width of inserting plate with its two ends  fixed (hereafter referred to as the pendulum 
type inserting plate) shall be in no case less than the value correspondi ng to the diameter of 
the circular saw as specified in the attached Table 7 
6. The thickness of the inserting plate shall be at least 1.1 times as large as the thickness of 
the circular saw blade. 
7. The mounting unit shall be so c onstructed to be able to adjust the gap between the circular 
saw blade teeth and the inserting plate.  
8. Mounting bolts: 
a) The mounting bolt shall be made of steel mate rial. The bolt diameter shall be in no case less 
than the value corresp onding to the type of the inser ting plate and the diameter of 
the circular saw blade as specifi ed in the attached Table 8: 
b) Two mounting bolts are required at the least. 
c) The mounting bolts shall have an anti-loosenin g feature by using the spring washers and etc.   
9. The supporting fittings shall be made of steel or  cast iron material which shall have sufficient 
strength to support th e inserting plate. 
10. When the diameter of the circular saw bl ade exceeds 610 mm, a pendulum type inserting 
plate shall be used. 
 Article 69 The anti-kickback pawls and the anti-kickback rods provided for the anti-kickback protective 
device (hereafter referred to as the anti-kickback pawls/ the anti-kickback rods) shall comply with 
the requirements as follows: 1.  Materials:  
The materials used for the anti-kickback pawls a nd the anti-kickback rods shall comply with the 
standard specified in CNS 2473 No.2 for “ Rolled steels for general structure”  materials or other 
materials having equivalent or s uperior mechanical properties. 
2. Construction: 
a) Except for those anti-kickback pawls of th e circular sawing machine equipped with an 
automatic feeding device, the anti-kickback  pawls and the anti-k ickback rods shall 
be constructed to be able to prevent the work piece from kicking up on the skew saw teeth side and shall have sufficient strength ba sed on the thickness of the work piece. 
b) The anti-kickback pawls of the circular saw equipped with an automatic feeding device shall 
be constructed to be able to prevent the work piece from kicking back and shall have sufficient strength based on the thickness of the work piece. 
  223. The supporting parts of the anti-kickback  pawls and the anti -kickback rods shal l have 
sufficient strength against the force resulti ng from kickback of the work piece. 
4. Except for those circular saw machines equipped with an automatic feeding device, a type of 
the  anti-kickback preventive devices other than the anti-kickback pawls and the anti-kickback rods shall be used for the circular sawing machines with its saw blade diameter exceeding 450 mm. 
 Article 70 The saw teeth touching protective devices used for th e circular saw machines shall comply with the 
requirements as follows: 1. Construction: 
a) When a saw teeth touching protectiv e device with the bottom of its cover 
normally contacting the wood work piece (hereafte r referred to as the movable type) is 
adopted for those circular sawi ng machines other than the portable type ones, the said cover 
shall be constructed to provide adequate sa fe guard coverage corresponding to the portion 
other than where the saw teeth in serting plate is located and other than where the work piece 
is being sawed.  
b) The cover used for those saw teeth touching  protective device other than the movable type 
one, shall be constructed to provide adequate  safe guard coverage  corresponding to the 
portion other than where the saw teeth inserting plate is located and ot her than where 8 mm 
above the top surface of the work piece in feedi ng process. In addition,  the said cover shall 
also be constructed to prevent itself from ra ising more than 25mm by adjusting from bottom 
of the sawing table. 
c) The construction of the protective covers as  mentioned in the above sub-items (a) and (b) 
shall be capable of allowing the operator to see the work-piece being sawed off during the sawing operation. 
2. The bolts, pins and etc. used for the hinge pa rt of the protective covers mentioned in above 
item 1 shall have an anti-loosening feature. 
3. The construction of the supporting part shall be  capable of allowing the position of the cover 
to be adjustable, and shall have sufficient stre ngth to support the cover. Moreover, the axles 
and bolts related to the supporting part  shall have anti-l oosening feature. 
4. The saw teeth touching protective device fo r the portable circular sawing machine: 
a) Protective cover: The cons truction of the protective co ver shall provide sufficient 
safeguard coverage to protect the portion othe r than the blade sawing area as required. In 
addition, the clearance as required for sawi ng by the sawing teeth shall in no case 
exceed the value specified in the attached Figu re 1, when the tilting base is adjusted to a  23location at the maximum sawing depth of the circular saw blade, and the angle between 
the saw blade and the tilting base maintains at 90 P 
Pdegrees. 
b) Fixed blade guard: the construction of the fixe d blade guard shall be capable of allowing the 
operator to see the work-piece being sawed off during the sawing operation. 
c) Retractable blade guard:  
(1) The retractable blade guard shall be constr ucted to be capable of being automatically 
returned to the “stop point” upon completion of the sawing operation. 
(2) The retractable blade guard shall be construc ted to be unable to be fixed at any location 
within its movable range. 
d) Supporting parts: The supporting parts shall ha ve sufficient strength to support the guards. 
e) The bolts used on the supporting parts, and the bolts used on the spring’s fastening fitting for 
the automatic recovering device for the retrac table blade guard shall have an anti-loosing 
feature. 
 
             Chapter 5   Power Driven Fork Lift Truck 
 
Article 71 
Based on  the loading conditions, the power-driven type fo rk lift trucks shall have the longitudinal 
stability and lateral stability without overturning on the slope surfaces as specified in the attached Table 9. However, the above requirements  are not applicable to those other than the 
balance type fork lift tricks. 
 
Article 72 
Based on  their loading conditions, the side -loaded type fork lift trucks  shall have the longitudinal 
stability and lateral stability without overturning on the slope surfaces as specified in the attached Table 10. 
 
Article 73 
Based on  their loading conditions, the ex tendable arm type fork li ft trucks shall have the 
longitudinal stability and lateral stability withou t overturning on the slope surfaces as specified in 
the attached Table 11.  Article 74 Based on  their loading conditions, the narr ow-path type fork lift trucks  shall have the longitudinal 
stability and lateral stability without overturning on the slope surfaces as specified in the attached Table 12. Article 75  24The fork lift truck shall have a brake device wh ich shall be capable of  stopping the truck from 
moving and  holding it in a standstill condition.  
Based on its loading condition and the initial brak ing velocity, the above brake device shall have 
a design feature to be capable  of stopping the fork lift truck within the stopping distance as 
specified in the attached Table 13.  The brake device for holding the tr uck in a standstill condition as mentioned in the above Item 1 
shall be capable of stopping the truck on a slope  surface specified in the attached Table 14, 
based on the loading condition of the said fork lif t truck. However, in case due to the maximum 
slope which can be achievable by the fork lift truck is  less than that as liste d in the attached Table 
14, the value of the said maximu m slope will be used accordingly. 
 Article 76 
The fork lift truck shall be equipped with a direction indi cator one each on its left and right 
hand sides except for those fork lift trucks with  their maximum velocity not reaching 20 km/hour, 
and the distance from the steering wheel center to  their outermost edges less than 65 cm, and no 
operator cab provided therein.  Article 77 The fork lift truck shall be equipped with a warning siren. 
 Article 78 Except for those noticed to be limited for use under a sufficient illuminative environment, the fork lift trucks shall be equipped wi th the front lights and rear lights. 
 Article 79 Except for those noticed to be limited for use under the condition that the falling goods will cause no concern for hazard to the ope rator during loading operation, th e fork lift trucks shall be 
equipped with an overhead guard in complia nce with the requirements as follows: 
1. The overhead guard shall be strong enough to w ithstand an equivalent 
distributed static loading based on the value of two (2) times the maximum loading of the 
fork lift truck. The above-mentioned value will be taken as four (4) tons, if it exceeds four (4) 
tons.   
2. The width or length of the openings of the body  frame of the overhead guard for the fork lift 
truck shall in no case exceed sixteen (16) cm. 
3. For those fork lift trucks operated by the ope rator sitting on the seat during operation, the 
distance between the upper edge  of the operator’s seat and the lower edge of the  25overhead guard shall be in  no case less than 95 cm. 
4. For those fork lift trucks operated by the ope rator standing on the floor during operation, the 
distance between the operator’s standing platform and the lower edge of the 
overhead guard shall be in  no case less than 1.8m.  
 Article 80 The fork lift trucks  shall be equipped with a rear support frame except for those noticed to be 
limited for use under the condition that that the fa lling goods will cause no concern for hazard to 
the operator when the mast is tilted backward during loading operation: 
 Article 81 The hydraulic device of the fork lift truck shall be equipped with a safety  valve to prevent the 
hydraulic pressure from exceeding its preset limit.  Article 82 The loading devices including fork, rod, and etc. used  for the fork lift trucks (hereafter referred as 
forks) shall be in compliance w ith the requirements as follows: 
1. The forks shall be made of stainless steel ma terial without significant  dents, deformation, 
and corrosion appeared thereon. 
2. The stress induced on the fork by the maximum ra ted load acting at the basic load center of 
forks shall be less than one-third of th e yield strength of the fork material.  
 Article 83 The safety factor of the chain of the loading/ un loading device for the fork lift truck shall be in 
no case less than 5.   The said safety factor is calculated by using th e value of the breaking load of the lift chain 
divided by the maximum load imposed on the same.  Article 84 For those fork lift trucks equipped with an operator’s seat movabl e upward and downward, a 
handrail shall be provided by the side of the said seat, together with a sa fety guard for protecting 
the operator from falling. For those fork lift trucks  with an operator’s seat, the said seat shall 
be constructed with a buffer material so as  to prevent the operator’s body from significant 
vibration during loading operation.  
         Chapter 6  Grinding Machinery and Abrasive Wheels  26 
Article 85: 
The abrasive wheel of grinding machin e shall have the following features: 
1. For those plain type, disk type, flexible type  and cut-off type abrasive wheels, its maximum 
operating peripheral speeds shall be determined  by taking a destructive abrasive wheel 
rotation test based on the samples which are made by using the same bonding material of 
each specific abrasive wheel. 
2. The abrasive grits of the abrasive wheel sample are made of alumina.  3. The dimension of plain type abrasive wheel and the disc type abrasive wheel shall be 
in compliance with the requirements as specified in Table 15:  The destructive abrasive wheel rotation test  specified in the above Item 1 shall be 
performed by using more than 3 abrasive wheel samples. The lowest value of each 
specific destructive rotation peripheral speed is taken as the destructive rotation peripheral 
speed of the abrasive wheel sample. 
4. Except for the plain type one used for r ough grinding application, the maximum operating 
peripheral speed of the abrasive wheels used fo r mechanical grinding at a speed within the 
limit of the normal operating peripheral speed (hereafter referred to as the normal speed) specified in the attached Table 16, shall not exceed the break rotation peripheral speed as specified in above Item 4 divided by a fact or of 1.8. However, the normal speed limit 
specified in the said Table 16 shall be take n as the maximum operating peripheral speed of 
the abrasive wheels, in case the maximum ope rating peripheral speed ex ceeds the said normal 
speed limit. 
5. Except for those abrasive wheels listed in  the above Item 5, the maximum operating 
peripheral speeds of the abrasive wheels under the above Item 1 shall be less  than the value of 
the break rotation peripheral speeds, determined  under the above Item 4, divided by a factor 
of 2. However, under the normal speed operation, the said value shall be taken as the normal 
speed limit, in case it exceeds the normal peripheral operating speed limit listed in the 
above-mentioned Table 16. 
6. The maximum operating peripheral speed of the ab rasive wheel shall be less than the value of 
the maximum operating peripheral speed of th e plain type one, specified in the above 
Items 5 and 6, multiplied by the figure specified in Table 17 based on the specific category of the grinding wheel and bond material. However,  the value of the ring shape wheel may be 
otherwise specified by the Ce ntral Competent Authority. 
  Article 86   27The performance of the abrasive wheels with diameter over 100 mm shall be qualified on each 
production batch basis by a rotati on qualification test at a speed equal to the maximum operating 
peripheral speed of the abrasive wh eel multiplied by a factor of 1.5.   
To conduct the above rotation test, at least 10 % of the finished wh eels shall be taken as the test 
samples. The said samples shall be five (5) as th e minimum, in case the calculated quantity is less 
than five by using the above 10 percentage criteri on.  If all the samples are proved to be normal, 
the whole batch of the fished wheels will be clas sified as the qualified products.  If the abnormal 
rate of the samples is under 5% , the whole batch of the fish ed wheels excluding the abnormal 
ones will be considered as the qualified products. However, those finished wheels which are appeared to be significantly defectiv e may be screened out from samples. 
The periodic destructive rotational test as specified in the Item 4 below shall be carried out for the abrasive wheels in a specific duration with in one month. The qualified wheels may be 
exempted from the requirements of rotational test as specified in above It em 1. Those abrasive 
wheels failed to meet the requirements of the periodic destructive rota tional test shall be 
processed as per the requir ements under above Item 2. 
The minimum value of the destructive peripheral ve locity obtained from the periodic destructive 
rotational test of at least thr ee abrasive wheels which all utilize the same bonding material,  for 
mechanical grinding other than rough grinding application, sha ll be the value of the maximum 
operating peripheral speed of the abrasive wheel multiplied by a factor of 1.8. For other abrasive 
wheels, the minimum value of the destructive pe ripheral velocity shall be the maximum operating 
peripheral speed multiplied by a factor of 2.0. T hose abrasive wheels u tilizing the same bonding 
material and operated under the normal rotationa l speed condition will all be considered as 
qualified products.  Article 87 Except for the flexible wheels, the dish type ones  shall be qualified by the impact test based on 
each category of the products applying to the same standard. The impact test shall respectively be carried ou t for more than two abrasive wheel samples by 
using the impact tester illustrated in the att ached Figure 2 to apply a momentum of 10kg-m 
impact at the two opposite locations of the abrasive wheel. If the minimum impact value obtained from the impact  test is equal to or higher than that listed in 
the attached Table 19, based on the corresponding thickness and di ameter of the abrasive wheel 
sample, the related products will be considered as the qualified products.  
    28Article 88 
The dimensions of the abrasive wh eels shall be of the values as sp ecified in the attached Table 20, 
based on their corresponding wheel category a nd the maximum operating peripheral velocity. 
 Article 89 The abrasive wheels shall use the flanges that m eet the requirements as specified in Article 90 
through Article 94. However, in case those abra sive wheels use the sa me fixing devices as 
listed in the attached Tabl e 21, the above mentioned requirements may be exempted. 
The keys or screws shall be adopted for fastenin g the fixed side flange on to the abrasive wheel 
shaft by using the press-in, heat-inserting, or othe r methods.  The fastening action for the screws 
of the abrasive wheel shaft shall be able to be done under a easy manners. 
When the straight type abrasive wheel is fast ened on to the grinding machine by using a safety 
flange, the rubber made inserting plate shall be adopted.  Article 90 The flange shall be made of a material str ong enough without deformation, and with its tensile 
strength equivalent to No.2 forged iron specified in the CNS 2472 for “ Gray Iron Castings ”. 
Except for those flanges depicted in Figure 3 of  Article 94, the dimensions of the diameter 
and the contacted width of the flange on the fi xed side and movable side shall be the same. 
 Article 91 The diameter of the straight t ype flanges shall be at least one  third of the di ameter of the 
mounted abrasive wheels. The clearance shall be above 1.5 mm as the minimum.  Moreover, 
the contact width shall be in compliance with the requirement as specified in the attached Table 
22 based on the corresponding diameter range of the said abrasive wheel. 
When mounted with a cut-off type abrasive wheel which is reinforced with a fiber glass net or 
other equivalent fabric materials wi th its tensile strength above 71 kg/mm
P2
P, and operated under a 
maximum operating peripheral speed less than 4800 meters per minut e (m/min), the straight type 
flange may have its diameter to be at least one- fourth of the diameter of the said cut-off type 
abrasive wheel, without being limited by the requirements as specified in the preceding Paragraph.  Article 92 The diameter of the sleeve (adaptor) type fla nge or the hub (arbor) type flange shall be 
determined by using the formula stated below: 
D
BfB Ú K (D-H) + H, where  29 D BfB: diameter of the flange on fixed side (unit: mm) 
D: diameter of the abrasive wheel (unit: mm) H: bore diameter of the flange on fixing side  K: constant values as list ed in the attached Table 23 
 
The contact width of the flange mentioned in the preceding Paragraph shall be in no case less 
than the value listed in the attached Table 24, based on th e diameter of the corresponding 
abrasive wheel:  The hub (arbor) type flange shall not be mounted  with those abrasive wheels used for operation 
exceeding normal speed application.  Article 93 The diameter of the safety type flanges used for the straight type wheel, shall be at least 
two-third (2/3) of the di ameter of the mounted abrasive wheels. For those flanges used for the 
double taper type wheels, their diameter shall be at least one-half (1/2) of the diameter of the 
mounted abrasive wheels. The tolerance of the flanges mentioned in the above Paragraph 1 shall be at least 1.5 mm.  
Moreover, the contact width shall be at least one-sixth (1/6) di ameter of the said flanges. 
The contact surface between the flange used fo r the double taper type wh eel and the abrasive 
wheel shall be kept with  at least one-sixteenth (1/16) gradient slope.  
 Article 94 The dimensions of the flanges used for the dish type abrasive wheel, whose configuration is as 
shown in the attached Figures 3and 4 shall be in compliance with the values as listed in the 
attached Table 25 ,based on the corresponding diamet er of the disk type abrasive wheel.  
 Article 95 The abrasive wheels except for those used fo r internal grinding a pplication shall be 
equipped with a safety guard that shall have the features as specified in  Article 96 through Article 
104.   Article 96 The safety guard of the abrasive wheel shall be made of a rolled malleable steel sheet material 
which has the mechanical properties as specified in the following:  1. The tensile strength shall be above 28 kg/mm
P2
P with the elongation sha ll not be less than 14%.  302. The sum of the value twice as many as the tensile strength (unit: kg/mm P2
P) and the value of the 
elongation percentage (unit: %) shall not be less than 76. 
The safety guards except for the band type one, and those used for the portable grinding machines, 
shall be made of the material listed in th e attached Table 26, according to the corresponding 
maximum operating peripheral speed of the abra sive wheel, without being restricted by the 
requirements specified in the preceding paragraph. 
The safety guard of the cut-off type ab rasive wheel with its maximum peripheral 
speed limited below 4800 m/min may be made of an aluminum material which has the tensile 
strength under 18 kg/mm P2
P and the elongation above 2 percentage ( %), without being restricted by 
the limitations specified in the above Items 1and 2.  Article 97 Except for the mandatory portion required to  be exposed for gri nding purpose, the 
protective coverage of the safety  guard shall be in compliance with the following requirements: 
1. The safety guard of the abrasive wheels  used for side grinding application: 
The protective coverage shall cover the peripheral area and the lateral area on the fixed side 
of   the abrasive wheel. 
2. The safety guard of the portabl e abrasive wheels other than th at mentioned in above Item 1, 
with its peripheral side part and lateral part on the fixed side made of seamless integral rolled malleable  steel sheet:  
The protective coverage shall cover the periphera l side area, the lateral area on the fixed side 
and  the lateral area on the detachable side of abrasive wheels as illustrated in the attached Figure 5. However, the partial top end of the peripheral side sheet which is 
bent 5 mm or more in length to  the detachable side as show n in the attached Figure 5, 
together with its thickness increased by more than 20 % of the value as listed in Item 1 of Article 29, will become on the latera l part of the detachable side. 
3. The safety guards other than thos e mentioned in above Items 1 and 2: 
The protective coverage shall cover the periphera l side, both lateral sides and the lateral side 
of the shaft of the abrasive wheel on the detachable side.  
 
The mandatory portion required to be exposed  for grinding purpose as mentioned in the 
preceding paragraph shall be in compliance with the requirements as depicted in the attached Figure 6, based on the ca tegory of the grinding machines. 
    31Article 98 
The thickness of the safety guard, except for the band type one, made of rolled malleable steel 
sheet  shall in no case be less than value list ed in the attached Table 27, according to the 
maximum operating peripheral sp eed and the corresponding thic kness and diameter of the 
abrasive wheel.  The thickness of safety guard made of cast iron, fo rged cast iron or cast st eel, shall in no case be 
less than the value determined in the above Paragraph 1, multiplied by the coefficient listed in the attached Table 28 based on th e category of material. 
 Article 99  The thickness of the safety guard with its peripheral  side and fixed side made of seamless integral 
malleable steel sheet, used for those abrasive wheel s listed in the attached Table 29 except for the 
dish shape type and the cut off type ones, shal l be determined according to the said Table 29 
without being restricted by Item 1 of Artic le 98, based on the maximum peripheral operating 
speed, as well as the corresponding thickness an d diameter of the abrasive wheel.   
The top edge end of the side plate of the disman tled side of the safety guard, with its peripheral 
plate on the fixed side connected with the side plate of the dismantled side, shall be bended in a 
shape as per the attached Figure 7.   Article 100 The thickness of the safety guard, w ith its peripheral plate and fixe d side plate made of seamless 
integral malleable steel sheet, used for the cut off type abrasive wheel with its diameter less than 
230 mm, shall in no case be less than  the value as listed in the attached Table 30 without being 
restricted by Item 1 of  Article 98, based on the corresponding thickness of the abrasive wheel.   
The top edge portion of above safety guard shall be constructed in a bended shape as per the 
attached Figure8. 
 
Article 101                                                                 
The thickness of the safety guard, made of compre ssive ductile steel sheet, used for the cut off 
type abrasive wheel with its maximum periphe ral operation speed less than 4800 m/min shall be 
determined according to the attached Table 31 without being restricted by the requirement stated in Paraphragh 1 of Article  98, based on the co rresponding thickness and diameter of the 
abrasive wheel and the divisi on of the safety guard.   
The thickness of the safety guard s made of cast iron, forged cast iron and cast steel, used for 
the cut off type abrasive wheel mentioned in above Item 1 shall be in compliance with the  32requirements as specified in  Item 2 of Article 98. 
The thickness of the safety gua rds made of aluminum, used for cut off type abrasive wheel 
mentioned in above Item 1 shall in no case be le ss than the tensile stre ngth of the aluminum 
multiplied by the  coefficient as listed in the attached Table 32.  Article 102 The thickness of band type safety  guard shall in no cas e be less than the value listed in the 
attached Table 33, according to the specific range of diameter  of the abrasive wheel.  
The above mentioned safety guard shall be installed as per the attached Figure 9.  
 Article 103 Any bore or groove that its existenc e could potentially impair the st rength of the material shall in 
no case be allowed to apear on the safety guard.  Article 104 The safety guard for the table t ype and bench type grinding mach ines shall be constructed to 
be capable of adjusting the gap between the abrasive wheel’s peripheral portion which is 
necessarily exposed for grinding purpose and the safety guard itself less than 10mm by using a 
tongue plate or other means:   The above mentioned tongue plate shall be in compliance with the following requirements: 
1. To be of a plate shape. 2. To be made of a ductile steel sheet specified under Item 1 of Article 96.  
3. To have a thickness equal to or more than that of the peripheral plate of the safety guard, with 
the limitation that it shall be 3mm as the minimum and 16mm as the maximum. 
4. To have an effective lateral cross section more  than 70% of the whole lateral cross section, 
and an effective longitudinal cr oss section more than 20% of the whole longitudinal cross 
section. 
5. The diameter and number of the fixing screws to  be in compliance with the value lspecified in 
the attached Table 34. 
 Article 105 A power shut-off device for the grinding machine shall be located where it can be actuated by the operator without leaving from his operating position.  The said power shut-off device shall be easy of ope ration. In addition, it shall also have a safety 
feature capable of preventing the grinding machine from being accidentally actuated by 
inadvertent contact of the button or due to  vibration resulting from other means.  33 
Article 106 The electrically driven portable type, table t ype, or bench type grinding machine shall be 
in compliance with the following requirements.  1. The screws used in the electrical circuitry sy stem shall have an anti-loosening feature.   
2. The insulating capability of the insulation pa rt between the charging and the non-charging  
metals shall be in compliance with the requirements specified in CNS 3265, “ Potable 
electric grinders .” 
3. A dedicated grounding terminals shal l be provided for grounding purpose. 
 Article 107 The table type or the bench type  grinding machine shall be provide d with a work piece stand that 
shall be capable of adjusting the gap between th e abrasive wheel and the stand itself less than 
3mm.  Article 108 The Portable type pneumatic grinding machine sh all be equipped with a governor except for that 
pneumatic grinding machine with its  nominal size less than 65mm. 
 Article 109 The abrasive wheels with diameter less than 50mm and their safety guards are not applicable to 
the requirements in this chapter. 
 
         C h a p t e r  7    A n t i -explosive Electrical Equipment 
 
Article 110 
The function, construction, testing, indication and the division of  the hazardous areas for the 
anti-explosive electrical equipment used for the gaseous category application shall be 
in compliance with the requirements specified  in the national standard CNS 3376 series, 
international standard IEC 60079 series , or other equivalent standards 
 Article 111 The function, construction, testing, marking and the classification of  the dust explosion areas for 
the anti-explosive electrical equipment used  for the dust category application shall be 
in compliance with the requirements specified in  the international standard IEC 61241 series, or 
other equivalent standards  34             C h a p t e r  8    M a r k i n g  
 
Article 112  The contents of the marking of the safety devi ces for the punching machinery shall include the 
following information: 1. Manufacture series number 2. Name of the manufacture. 3. Date of being manufactured. 4. Applicable category of the punching machiner y, pressure capacity, stroke length (not 
applicable to two-hands operati on type safety devices), the st roke numbers per minutes (not 
applicable to two-hands operation type and photoe lectrical type safety devices) and the range 
of the size of the metal dies. 
5. The nameplate indication for the two-hands ope ration type and photoelectrical type safety 
devices shall be in conformity with the following requirements: 
(1) Single stroke type safety devices:  
The duration (T
B1B), expressed in millisecond, from the time when the operator’s 
hand leaves the button until the time when the rapid stop mechanism starts to take action. 
(2) Two-hands actuation type safety devices: 
The maximum duration (Tm), expressed in  millisecond, from the time when the 
operator’s hand leaves the button until the time when the slide-block(s) of the applicable punching machinery reaches the lower dead point.       
(3) Photoelectrical type safety devices: 
The duration (T1), expressed in millis econd, from the time when the operator’s 
hand interrupts the light beam until the time when the rapid stop mechanism starts to 
take action. 
(4) The shut down time of the applicable punching machinery: 
The duration (Ts), expressed in millis econd, from the time when the rapid stop 
mechanism starts to take action until the time  when the slide-block(s) stop. However, if 
the maximum shut down time (T
B1BÐTs) is indicated instead, the T B1Band the Ts may 
need not be indicated respectively. 
(5) The shut down time for the single stroke t ype and the photoelectrical type safety devices 
shall be as per the definition stated in the preceding Sub-item (4). The safety distance, 
expressed in millimeter, for the two-hand actuation type safety devices shall be that corresponding respec tively to the maximum duration as per the preceding Sub-item 
(2). The safety distance, expressed in millim eter, for the two-hands operation type safety  35devices shall be the distance between the push buttons and the dangerous boundary. The 
safety distance, expressed in millimeter, for the photoelectrical type safety devices, is the distance between the photo b eam and the dangerous boundary. 
6. The nameplate indication for the photoelectri cal type safety devices shall contain the 
following items in addition to those sp ecified in the preceding Item 5: 
(1) The effective distance: 
The range of the distance expressed in millimeter, wherein the photo-emitter and the 
photo-receiver can perform th eir function effectively. 
(2) The protected height, expr essed in millimeter, for the applicable punching machinery. 
 
Article 113  The contents of the marking of the safety devi ces for the shearing machinery shall include the 
following information: 1. Manufacture series number  2. Name of the manufacture. 3. Manufactured date of being. 4. Applicable category of the shearing machinery. 5. Shearing thickness, expressed in millimet er, for the applicable shearing machinery. 
6. Tool length, expressed in millimeter, of the applicable shearing machinery. 
7. Photoelectrical type safety devices: 
The effective distance, expressed in m illimeter, wherein the photo-emitter and the 
photo-receiver can be functioning effectively. 
 
Article 114  The following information shall be marked at an evident location on the punching machinery: 
1. Manufacture series number 2. Name of the manufacture. 3. Manufactured date. 4. Mechanical specification: As per the require ments specified in the attached Table 35. 
 Article 115  The following information shall be marked at an evident location on the hand-feed planner: 
1. Manufacturer’s name 2. Manufactured date 3. Rated power or rated current 4. Rated voltage  365. Rotational speed under non load condition 
6. Effective cutting width  7. Effective cutting width applicab le to the hand-feed planner, shall be marked on the blade 
touching preventive device. 
 Article 116 The following information shall be marked at an evident location on the circular sawing machine: 
1. Manufacturer’s name 2. Manufactured date 3. Rated power or rated current 4. Rated voltage 5. No load rotational speed; or no load rotati onal speed during the spee d transition stage for 
the circular saw with variable speed gears. 
6. Applicable range of diameters and the types of  the circular saw blade; or usable range of 
diameters and types of the circular saw blade dur ing the speed transition stage for the circular 
saw with variable speed gears. 
7. The applicable range of diameters and thickness for the inserting plate, and the position of the 
standard saw stand. 
8. Applicable diameter range a nd usage of the circular saw to be marked on the saw teeth 
touching preventive device.  
 Article 117 The following information shall be marked at an evident location on the fork lift truck: 
1. Manufacture’ name. 2. Manufactured date. 3. Manufacture series number. 4. Maximum load. 5. Allowable load: the maximum loading capacity to be determined based on the construction 
and the material of the fork lift truck, as well as the center of gravity of the forks with the 
goods loaded thereon. 
 Article 118 The following information shall be marked at an evident location on the grinding machines: 
1. Manufacture’s name. 2. Manufactured date. 3. Rated voltage.  374. No load Rotational speed. 
5. Applicable diameters, thicknesses, and the bore sizes for the grinding machines 
6. Rotational direction of the grinding machines 7. Maximum operating velocity, thickness and diamet er of the applicable grinding machines to 
be marked on the safety guard. 
 Article 119 The following information shall be marked on the abrasive wheels: 1. Manufacture’s name. 2. Bonding material category.  3. Maximum operating peripheral velocity  (In addition, rotational speed may be 
marked thereon.)  
The above listed information may be marked on the smallest package unit for those abrasive wheels with diameter less than 75 mm. 
 
            Chapter 9  Supplementary Provisions   
 
Article 120 Those machines and devices which have difficulty in  applying this standard may be granted to be 
exempted from part of the requirements of th is standard, by submitting the relevant technical 
documents including the designed risk analyses  and the construction drawings for central 
governing authority’s review and approval. The said safeguard features shall be 
reviewed and recognized to be e quivalent or superior to the re quirements of the related national 
standards, international standa rds, technical specifications, and etc. based on the risk 
induced hazardous circumstances and the design theories. The above-mentioned review and recogni tion actions may be performed by an 
academic organization or a relevant professional society under the authorization from central 
governing authority.    Article 121 This standard shall come into effect on the date when it is issued, except for Articles 110 and 111 
which shall come into effect from July 1, 2011.      38               A t t a c h m e n t  
Table 1 
Mechanical Punching 
machinery category Press capacity 
(unit: ton) Stroke numbers 
(unit: strokes/minutes) 
Less than 20 150 
Above 20 but less than 30 120 
Above 30 but less than 50 100 Punching machinery  equipped with a sliding pin type clutch set  
Above 50 50 
Less than 20 300 
Above 20 but less than 30 220 
Above 30 but less than 50 150 Punching machinery  
equipped with a rolling key type clutch set 
Above 50 100 
  39Table 2 
Mechanical 
punching machinery category Component of 
the clutch               M a t e r i a l  
Sliding pin To be in compliance with national standard CNS 
3230 for “ Nickel Chromium Steel for Machine Structural Use”  
Actuating cam To be in complian ce with national standard of CNS 
2964, Class SK4 or SK5 fo r “Carbon Tool Steel” ; 
or CNS 3229 for “ Chromium Molybdenum Steel for Machine Structural Use”   Punching machinery  equipped with a sliding pin type clutch set 
Stop block for sliding 
pin  To be in compliance with national standard CNS 
2965, class SKS44 for “Alloy Tool Steels” ; or CNS
3229 for “ Chromium Molybdenum Steel for Machi
n
Structural Use” 
Inner side clutch ring To be in co mpliance with national standard CNS 
3230 for “ Nickel Chromium Steel for Machine Structural Use; or CNS 3828, Class S40C, S43C or 
S45C for “Carbon Steels for Machine Structural Use” 
Central clutch ring To be in comp liance with national standard CNS 
3230, class S40C, S43Cor S45C for “ Nickel Chromium Steel for Machine Structural Use” 
Outer side clutch ring To be in compliance with CNS 3828, Class S40C, 
S43C or S45C for “Carbon Steel for Machine Structural Use”   Punching machinery  equipped with a rolling key type clutch set  
Rolling key, 
actuating cam and metal fittings for engaging and detaching of the clutch To be in compliance with national standard CNS 
2965, class SKS44 for “Alloy Tool Steels”  
    40Table 3  
Mechanical 
Punching machinery category Component of 
the clutch   Heat treatment           Surface hardness 
 (Rockwell C value ) 
Sliding pin Quenching, annealing More than 52 but less 
than 56 
Actuating cam (1)Carbon tool steel: 
Quenching, annealing at  the contacting portions 
(2) Chromium Molybdenum
Steel: Carburizing and followed
  by quenching, annealing More than 52 but less than 5
6Punching 
machinery  equipped with a sliding pin type clutch set  
Stop block for 
sliding pin (1)Alloy tool steel:  
Quenching, annealing 
(2)Chromium Molybdenum
Steel: Carburizing and followedby quenching, annealing More than 54 but less than 5
8
Inner side clutch 
ring  Quenching, annealing More than 22 but less than 2 5
Central clutch 
ring Carburizing and followed by 
quenching, annealing More than 52 but less 
than 56 
Outer side clutch ring Quenching, annealing More than 22 but less than 2
5
Rolling key Quenching, annealing More than 54 but less than 5 8
Actuating cam Quenching, annealing More than 42 but less than 4 5Punching 
machinery  equipped with a rolling key type clutch set 
Rolling key, 
actuating cam and metal fittingsfor engaging and detaching of the clutch Quenching, annealing More than 42 but less than 4
5
 
  41Table 4 
Hydraulic punching  
machinery category Press capacity 
(unit: ton) Decreased inertia value 
(unit: millimeter) 
 Below 50 50 
 Above 50 but less than 300 100 Hydraulic punching 
machinery other than hydraulic type folding machinery  Above 300 150 
 Below 100 20 
 Above 100 but less than 500 50 Hydraulic type folding 
machinery  
 Above 500 150 
 
Table 5 
Circular saw blade type C onstruction part Material 
Blade teeth To be in compliance with the material 
requirements for super-hard blades Super hard circular saws 
Blade body To be in compliance with No. 5 or No. 6 grade 
steel material requiremen ts specified in CNS 2964 
“Carbon tool steels.” 
Circular saws other than super hard ones   To be in compliance with No. 5 or No. 6 grade ste
e
material requirements specified in CNS 2964 
“Carbon tool steels.” 
 Table 6 
Circular saw blade diameter (unit: mm) Inserting plate width  (unit: mm) 
Less than 152 
203 255 305 355 405 455 510 560 610 30 
35 45 50 55 60 70 75 80 85 
Remarks: when the saw blade diameter is betwee n the listed values, the interpolation approach 
may be used to determine the value needed.   42Table 7. 
Circular saw blade diameter (unit: mm) Value (unit: mm) 
Less than 810 
More than 810 but less than 965 
More that 965 but less than 1120 
More than 1120 40 
50 60 70 
 Table 8 
Inserting plate type Circular saw blade diameter  
(unit: mm) Bolt diameter  
(unit: mm) 
Less than 203 5 
More than 303 but less than 355 6 
More than 355 but less than 560 8 Sickle type inserting plate 
More than 560 but less than 610 10 
Less than 915 6 Pendulum type inserting plate 
More than 915  8 
          
Figure  1 
 
 
     43
Table 9         Type Fork Lift Truck 
 
VjM a x i m u m  V e l o c i t y ( k m / h )          X - Y jTilt Axis of the Platform 
M-NjLateral Stability Axis of Fork Lift Truck 
A-BjLongitudinal Center Line of Fork Lift Truck 
 Test Item No. 1 2 3 4 
Stability Classification Longitudinal Stabil i t y           L a t e r a l  S t a b i l i t y  
Stability Test condition Standstill Operating Standstill Operating 
Loading Status Loaded Loaded Loaded Not Loaded 
Fork Lift Height Maxi mum 300mm Maximum 300mm 
Tilt Degree of Mast or 
Fork Vertical Tilting backward 
Below 5 Tons 4% 18% 6% (15+1.1v)% 
(Max:50%) Tilt 
Degree 
of 
Platform Above 5 Tons 
but Below 10 
Tons 3.5% 18% 6% (15+1.1v)% 
(Max:40%) 
Position of the Fork 
Lift Truck on the 
platform  
            
 
     44Table 10   Side-Lifting Type Fork Lift Truck 
VjM a x i m u m  V e l o c i t y  ( k m / h )              X - Y jTilt Axis of the Platform  
M-NjLateral Stability of the Fork Lift Truck    A-B jLongitudinal Centerline of the Fork Lift 
Truck 
 Test Item No. 1 2 3 4 
Stability Classification Longitudinal Stability Lateral Stability 
Stability Test 
Condition Standstill Operating Standstill Operating 
Loading Status Loaded Loaded Loaded Not Loaded 
 Lifting Height   
Of Forks Maximum Elevation of 
platform Maximum 300Đ 
Telescopic Degree Extended Retracted Extended Retracted 
Tilt Degree of Mast or 
Forks Vertical 
Stabilizer Extended Retracted Extended Retracted 
Below 5 Tons 6% 18% 4% (15+1.1v)% 
(Max:40%) Tilt 
Degree 
of 
Platform Above 5 Tons 
but Below 10 
Tons  6% 18% 3.5% (15+1.1v)% 
(Max:50%) 
Position of the Fork 
Lift Truck on the 
platform  
 45Table 11 Telescopic Type and Best riding Type Fork Lift Trucks 
 
VjMaximum Velocity(km/h) d               XY : Tilting Axis of Platform d   
M-NjLateral Stability Axis of Fork Lift Truck d  A - BjLongitudinal Centerline of Fork Lift 
TruckTest Item No. 1 2 3 4 5 6 7 8 
Stability Classification Forward stability  Lateral Stability Backward stability 
Stability Test Condition Standstill Operatin g Standstill Operating Standstill Operating
Loading Status Loaded Loaded Loaded Not 
LoadedNot 
Loaded Loaded Not 
LoadedNot 
Loaded
Lifting height of forks Max imum  DWG2, 
DWG 3 Maximum Maximum DWG 2, 
DWG 3 Maximum Maximum DWG 2,
DWG 3
Telescopic Degree(Telescopic Type 
Fork Lift Truck) Extended Retracted Retracted Retracted  
Retracted Retracted Retracted Retracted
Tilt Degree of Mast or Forks Vertical Maximum 
Tilting 
BackwardThe Worst Stability Status 
Tilt Degree of Platform  
  
4%  
  
18%  
  
6%  
  
8%  
  
DWG 4  
  
14% Single Rear 
Wheel Braked 14%Multiple Rear Wheels Braked 18% 
  
DWG 5
  Position of Fork Lift Truck on the 
platform 
                  
 
 46Table 12  Aisle Type Fork Lift Truck 
Test Item No. 1 2 3 4 
Stability Classification Longitudinal Stability Lateral Stability 
Stability  
Test  Condition Standstill Operating Standstill Operating 
Loading Status Loaded Loaded Loaded Not 
LoadedNot Loaded 
Lifting Height of Forks Ma ximum 300mm Maximum 300mm 
Tilt Degree of Mast or 
Fork Vertical Tilting 
BackwardTilting Backward Tilting Backward 
Position of Fork Lift 
Truck on Platform DWG B2 & 
B6 DWG 
B3&B7 DWG B4 &B8 DWG B5& B8 
Below 5 Tons 4% 18% 6% 8% (15+1.4v)% (1) 
(Maximum 50%)  Tilt 
Degree of 
Platform More 
Than 5 Tons 
but Less Than 
10 Tons 3.5% 18% 6% (15+1.4v)% (1) 
(Maximum 40%)   47
 
  
   
       
 VjMaximum Velocity (km/h) 
X-YjTilting Axis of Platform 
M-NjLateral Stability Axis of Fork Lift 
    Truck 
A‐BjLongitudinal Centerline of Fork Lift  48Table 13 
Fork lift truck status Initial brake sp eed (unit: km/hour) Stop distance (unit: m)
Basic no-load status with 
truck in traveling   20 (in case the maximum speed of the 
fork lift truck is less than 20 km/hour,  the value of the same will be taken.)  5 
Basic load status with 
truck in traveling  10 (in case the maximum speed of the 
fork lift truck is less than 10 km/hour,  the value of the same will be taken.) 2.5 
Remark:  
1.“The basic no-load status with truck in travelin g” indicates that the tr uck is in a condition  
where the extendable arm is fully retracted in or der to keep the mast vertically and the fork
 horizontally, while the upper end of the fork ma intains at a lever of 30 cm above the floor.
2.“The basic load status with truck in traveling”  indicates that the truc k is in a condition where
 both the mast and the fork are at  the maximum swept-back positions. 
 
Table 14 
The fork lift truck status Slope (unit: %) 
Basic no-load status with truck in traveling 20 
Basic load status with truck in traveling 15 
Remark:  
1.“The basic no-load status with truck in travelin g” indicates that the tr uck is in a condition  
where the extendable arm is fully retracted in or der to keep the mast vertically and the fork
 horizontally, while the upper end of the fork ma intains at a lever of 30 cm above the floor.
2.“The basic load status with truck in traveling”  indicates that the truc k is in a condition where 
both the mast and the fork are at the maximum swept-back positions. 
 
Table 15 
Dimension (unit: mm) Abrasive wheel type 
Outer diameter Thickness Bore diameter 
Plain  shape abrasive wheel 305 > x > 205 25 > y > 19 Half of diameter 
Dish shape abrasive wheel 180 6 22 
 
 
    49Table 16 
Limitation of normal 
operating peripheral speed of  the abrasive 
wheel, unit) Abrasive wheel type 
Without 
organic bond With 
organic bond
General application 33 50 
Super heavy grinding - 63 
Screw grinding and groove 
grinding 63 63 Non 
fabric reinforced 
Crankshaft and camshaft 
grinding 45 50 
Diameter less than 100 mm, 
thickness less than 25 mm - 80 
Diameter more than 100mm, 
less than 205 mm, thickness less than 13 mm. - 72 Plain shape 
grinding wheel 
Fabric reinforced 
Other dimensions - 50 
One side tapered wheel, double sides taper wheel, single 
recessed wheel, double sides recessed wheel, safety shape wheel, dish shape wheel and cut-off wheel 33 50 
General application 33 50 
Taper shape wheel Screw grinding and groove 
grinding 63 63 
General application      33 50 
Recessed center-less wheel Crankshaft and camshaft 
grinding 45 50 
Ring shape wheel and slice ring shape wheel 30 35 
Straight cup wheel and flaring cup wheel 30 40 
Saw teeth shape wheel and slic e saw teeth shape wheel  33 45 
Non fabric reinforce d - 57 Dish shape wheel (diameter less than 
230 mm, thickness less than 10 mm) Fabric reinforced - 72 
Non fabric reinforce d - 63 Cut off wheel Fabric reinforced - 80 
Remark: the maximum peripheral operating spee d of the imported abrasive wheels shall 
be converted according to the following table.  
Maximum operating peripheral speed of the imported abrasive wheel 
(feet/min) Converted to (m/sec) 
6500 
8500 
9500 
12000 16000 
20000 33 
45 
50 
60 80 
100  50Table 17 
Category of the abrasive wheels Bond Material Value 
Organic Single tapered wheel, Double taper wheel, Single 
recessed wheel, Double recessed wheel, Safety shape wheel, Taper shape wheel Dish shape wheel, Saw-of
f 
wheel, Recessed center-less wheel Inorganic 1.0 
Inorganic 0.9 Ring shape wheel Organic 0.7 
Inorganic 0.9 Straight cup wheel and flaring cup wheel Organic 0.8 
Inorganic 1.0 Saw teeth shape wheel Organic 0.87 
 
Figure 2 
      
 
      
Table  18  
Diameter of 
abrasive 
wheel (unit: 
mm) 70 Above 
70, below 90 Above9
0, below 
110 Above11
0, below 
120 Above12
0, below140 Above14
0, 
below16
0 Above16
0, below 
180 Above18
0, below 
220 Above
220 
A (unit: mm) 8 13 13 13 18 30 38 42 42 
B (unit: mm) 19 19 27 36 36 36 36 36 52.5
   
 51Table 19 
Thickness of abrasive 
wheel (unit: mm) Diameter of abrasive wheel (unit: 
mm) Value (unit: kg/m) 
Less than 100 1.0 
More than 100, less than 125 1.3 
More than 125, less than 150 1.6 
More than 150, less than 180 2.0 
More than 180, less than 205 2.2 Less than 6 
More than 205 2.4 
Less than 100 1.5 
More than 100, less than 125 1.9 
More than 125, less than 150 2.4 
More than 150, less than 180 3.0 
More than 180, less than 205 3.5 More than 6 
More than 205 4.0 
 
  52Table 20 
Specific dimension (unit: mm) Maximum 
peripheral 
operating 
speed of 
abrasive 
wheels 
Unit: m/min Category of 
abrasive wheels Diameter 
(D) Thick-
ness 
(T) Bore 
(H)Reces-
sion 
diameter 
(P) Thickness of 
fixed part (E) Diamete
r of 
parallel 
area in 
fixed pa
rt (J or 
K) Edge 
thickn
ess 
(W)
Normal speed All Cut-off 
abrasive wheel less than 1500 Less 
than 0.7DMore 
than 1.02Df+4 To the 
straight cup and flaring cup, 
the thickness 
for this area is more than T/4. 
To the one side 
recessed wheel, both sides 
recessed wheel, 
dish shape wheel 
and dish cut-off 
wheel, this thickness for 
this area is 
more than T/2 More 
than Df+2R Less 
than ű 
Speed u
nder 2700 Straight shape, 
one side 
tapered wheel, 
both sides taper wheel, one side 
recessed wheel, 
both sides recessed wheel, 
safety shape 
wheel, taper shape, double 
recessed centerl
ess abrasive wheel  Less than 
1065 More 
than D/75, less than D (DÙ
610) Less 
than 0.6DMore 
than 1.02Df+4 More than 
(2/3)T More 
than Df+2R  
Spee
d other than normal speed 
Speed o
ver 2700 and under 3600 Straight shape, 
one side 
tapered wheel, both sides taper 
wheel, one side 
recessed wheel, both sides 
recessed wheel, 
safety shape wheel, taper 
shape, double 
recessed centerless, 
hub bed abrasiv
e wheel  Less than 
1065 More 
than D/50, less than 305  Less 
than 0.5DMore 
than 1.02Df+4 More than 
(2/3)T More 
than Df+2R   53Speed u
nder 3600 and under 4800 Straight, taper, 
safety, cut-off abrasive wheel Cut-off: 
less than 1500, others: less than 760 More 
than 
D/50, less 
than 
80 Less 
than 0.33D   More 
than Df+2R  
 
Speed o
ver 4800 under 6000 Straight, taper, 
safety, cut-off abrasive wheel Cut-off: 
less than 1500, others: less than 760 More 
than 
D/50, 
less than 
80 Less 
than 0.2D  More 
than Df+2R  
Remarks: 
1.Listed Df is the fixed flange diameter, žis the inner radius of recession groove. 
2.Listed void items can be whatever values. 
  
Table 21 
Abrasive wheel diversity Fixed device 
Ring type abrasive wheel, dish type abrasive wheel 
and straight cup abrasive wh eel with center nuts; plug/con e
abrasive wheel with nuts and other abrasive wheels with 
nuts  Base of device with fixed nuts 
Ring plate abrasive wheel Ring clamping device 
Crank shaft abrasive wheel Shaft fixed device 
Straight abrasive wheel for inner bore grinding purpose, 
which is attached in the pr ecise bore of inner grinding 
machine Bolts fixed device 
 
Table 22 
Abrasive wheel diameter  
(unit: mm) Contact width (unit: mm) 
Under 65 More than 0.1D Bf Bbut less than 0.26D BfB 
Above 65 and under 355 More than 0.08D BfB but less than 0.18D BfB 
Above 355 More than 0.06D Bf Bbut less than 0.18D BfB 
Remarks: The “D Bf B“ represents the diameter of the flange on the fixed side. 
 
     54Table 23 
ŷ 
Abrasive wheel diameter  
(Unit: mm) Abrasive wheel under normal 
speed application Abrasive wheel under other tha n
normal speed application 
Under 610 0.13 0.15 
Above 610 but under 760 0.11 0.13 
Above 760 but under 1065 0.10 0.12 
Above 1065 0.08 0.10 
 
Table 24 
Contact width (unit: mm) 
Sleeve type flange on fixed side Hub type flange on 
fixed side Abrasive wheel diameter 
(Unit: mm) Abrasive wheel unde r
normal 
speed application Abrasive wheel unde r
other than normal 
speed Abrasive wheel under 
normal speed 
Under 100 4 5 8 
Above 100 but under 125 6 7 12 
Above 125 but under 205 7 8 15 
Above 205 but under 305 10 12 22 
Above 305 but under 405 13 16 22 
Above 405 but under 610 13 20 22 
Above 610 but under 1065 16 25 32 
Above 1065 32 32  
 
Fig 3 
 
 
  55Table 25 
Values (unit: mm) Diameter of disk 
type abrasive 
wheel 
(Unit: mm) Flange 
diameter of 
fixed side Flange 
diameter of 
movable 
side Flange 
thickness 
of 
fixed sideBore 
diameterr1 in the  
Figure 3 r2 in the 
Figure 3
Under 100 50 18 4.0 9.53 3.2 4.9 
Above 100 100 40 4.8 23.23 10,0 10.0 
 
 
Figure 4 
 
 
 
Table 26 
Maximum operating peripheral speed of 
abrasive wheel unit: m/sec Material 
Under 33 Cast iron, forged cast iron or cast steel 
Above 33 and under 50 Forged cast iron or cast steel 
Above 50 Cast steel 
Remarks: the listed materials shall possess the following mechanical characteristics: 
1.The cast iron shall possess an equivalent or su perior tensile strength  for two categories as 
specified in nationa l standard CNS 2472 “ Gray Iron Castings ”. 
2.The forged cast iron shall posse ss a tensile strength above 32 kg/mm P2
P with the elongation 
above 8 percentage ( %). 
3.The cast steel shall possess a tensile strength above 37 kg/mm P2
P with the elongation above 
15 percentage (%). The summation of 0.6 times tensile strength (unit: kg/mm P2
P) pluses the 
elongation percentage (unit: %) shall be above 48.  56 
Figure 5 
                            
 
 
Remarks: “A” shall be more than one half of the abrasive wheel radius. 
 
Figure 6 
 
(1) Cylindrical type grinding machine, cente r-less type grinding machine, tooling type 
grinding machine, universal type grinding m achine and other similar types of grinding 
machines: 
 
    (2)Portable type grinding machine, swin g type grinding machine, ingot plate grinding 
machine        and other similar types of grinding machines: 
  57(3) Surface grinding machine, cut-off grinding machine and other similar types of grinding 
   machines: 
 
(4) Table type or bench type grinding mach ine for purpose of smoothing the ragged cast 
irons: 
 
       (5) Table type or bench type grinding machine for purpose of using the top portion of the 
          a b r a s i v e  w h e e l :  
 
 
(6) Table type, bench type and other similar types of grinding machines except for those 
mentioned in the preceding Items 4 and 5: 
  58Table 27 
The diameter of abrasive wheel (Unit: mm) 
Under 
150 Above 
250 and under 305 Above 
305 and under 405 Above 
405 and under 510 Above 5
10 and un-der 610 Above 
610 and un-der 760 Above 
760 and un-der 1250 
The maximum 
operating 
peripheral speed of 
abrasive wheel 
(Unit: m/sec) Abrasive 
wheel 
thickness 
(Unit: mm) 
ABABABABAB  A  B  AB
Under 50 1.6 1.6 2.3 1.9 3.1 2.3 3.9 3.1 5.5 3.9 6.3 4.5 7.9 6.3
Above 50 un-
der 100 1.9 1.6 2.3 1.9 3.1 2.3 4.5 3.9 6.3 3.9 7.0 4.5 8.7 6.3
Above 100 un-
der 150 2.3 1.6 3.1 2.7 3.9 3.1 6.3 3.9 7.0 4.5 7.9 5.5 9.5 7.9
Above 150 un-
der 205 ÑÑ3.9 3.5 5.5 4.5 6.3 4.5 7.0 4.5 7.9 5.5 9.5 7.9
Above 
205 under 305 ÑÑ4.5 4.3 5.5 4.5 6.3 4.5 7.0 4.5 7.9 5.5 9.5 7.9
Above 
305 under 405 ÑÑÑÑ7.0 6.3 7.9 6.3 8.0 6.3 9.0 6.7 11.0 8.7Under 33 
Above 
405 under 510 ÑÑÑÑÑÑ8.7 7.0 8.7 7.0 9.5 8.7 12.7 10.0
Under 50 2.2 1.6 4.2 3.4 4.5 3.8 5.5 4.4 6.6 4.9 7.7 6.0 10.0 7.7
Above 50 un-
der 100 2.4 1.6 4.4 3.8 5.4 4.2 6.6 5.5 7.7 5.5 8.0 6.0 10.5 7.7
Above 100 un-
der 150 3.2 1.6 5.8 4.9 6.3 5.4 8.3 6.0 8.8 6.6 9.0 7.0 12.0 9.7
Above 150 
under 205 ÑÑ7.0 5.6 8.8 7.0 9.4 7.0 10.0 7.0 10.5 7.8 13.0 10.0
Above 
205 under 305 ÑÑ8.0 6.9 9.3 7.7 9.9 7.7 10.5 7.7 11.0 8.3 14.5 11.0
Above 
305 under 405 ÑÑÑÑ10.5 9.4 12.0 9.9 12.5 9.9 13.6 10.8 17.0 13.0Above 33 but     
under 50 
Above 
405 under 510 ÑÑÑÑÑÑ13.0 11.0 13.0 11.0 14.5 12.7 19.0 16.0
Under 50 3.1 1.6 7.9 6.3 7.9 6.3 7.9 6.3 7.9 6.3 9.5 7.9 12.7 9.5
Above 50 
under 100 3.1 1.6 9.5 7.9 9.5 7.9 9.5 7.9 9.5 7.9 9.5 7.9 12.7 9.5
Above 100 
under 150 4.7 1.6 11.0 9.0 11.0 9.5 11.0 9.5 11.0 9.5 11.0 9.5 17.4 12.0
Above 150 
under 205 ÑÑ12.7 9.5 14.0 11.0 14.0 11.0 14.0 11.0 14.0 11.0 19.0 12.7
Above 
205 under 305 ÑÑ14.0 11.0 15.8 12.7 15.8 12.7 15.8 12.7 15.8 12.7 22.0 15.8Above 50 but under 
80 
Above 
305 under 405 ÑÑÑÑ15.8 14.0 19.0 15.8 19.0 15.8 20.0 17.4 26.9 20.0 59 Above 
405 under 510 ÑÑÑÑÑÑ20.
017.
420.
017.
4 22.
0 19.
0 30.
023.
8
Remarks: “ ŭ” represents the thickness of  peripheral side plate of the safety guard; while “B” 
represents the thickness of safety guard side. 
 
                  
                  
Table28 
                  
Material category Coefficient 
Cast iron 4.0 
Forged cast iron 2.0 
Cast steel 1.6 
 
Table 29 
Diameter of abrasive wheel (Unit: mm) Maximum 
operating 
peripheral 
speed 
(Unit: m/sec) Thickness 
of abrasive 
wheel (Unit 
mm) Safety 
guardAbove 
125 Above 
125 but 
under 
150 Above 
150 but 
under 
205 Above 
205 but 
under 
255 Above 
255 but 
under 
305 Above 
305 but 
under 
355 
ŭ 1.6 1.6 1.8 2.0 2.3 3.0 Under 32 Ů 1.2 1.2 1.4 1.6 1.8 2.3 
ŭ Ñ Ñ Ñ 2.0 2.3 3.0 Under 33 Above 32 
and under 5
0 Ů Ñ Ñ Ñ 1.6 1.8 2.3 
ŭ 1.6 2.2 2.6 3.0 3.2 4.0 Under 32 Ů 1.6 1.6 1.6 2.0 2.3 2.8 
ŭ Ñ Ñ Ñ 3.0 3.2 4.0 Above 33 
and under 50 Above 32 
and under 50 Ů Ñ Ñ Ñ 2.0 2.3 2.8 
Remarks: “ A” represents the peripheral side plat e and the fixed side plat e of the safety guard; 
while “B” represents the dismantled side plate of the safety guard. 
 
                                         60Figure 7 
 
 
 
. 
Table 30 
Thickness of abrasive wheel 
(Unit: mm) Value 
(Unit: mm) 
Under 10 1.6 
Above 10 and under 20 2.3 
 
 
                                        Figure 8 
 
 
 
Remarks:  “A” shall be greater than the va lue corresponding to the specific range of the 
diameter D of the abrasive wheel.  (Unit: mm) 
 
As DÙ125  3 
As 125ÖDÙ180  4 
As 180ÖDÙ230  5 
     61Table 31 
Diameter of abrasive wheel (Unit: mm) Thickness 
of abrasive 
wheel 
(Unit: mm) Division of 
guard Under 205 Above 
205 and unde
r 305 Above 
305 and unde
r 510 Above 510 
and under 
760 Above 760 
and under 
915 
ŭ 1.6 2.0 2.5 4.0 5.0 Under 6 Ů 1.2 1.6 2.0 2.8 4.0 
ŭ 2.0 2.3 3.2 5.0 6.3 Above 5 
Under 13 Ů 1.6 1.8 2.5 3.2 5.0 
Remarks: “ ŭ” represents the peripheral plate of the safety guard; while” Ů” represents the side 
plate of the safety guard. 
 
Table 32 
Aluminum tensile strength 
(Unit: kg/mm P2
P) Coefficient 
Above 18 and under 23 3.0 
Above 23 and under 31 2.5 
Above 31 2.0 
 
Table 33 
 Thickness of abrasive wheel 
(Unit: mm) Value 
(Unit: mm) 
Under 205 1.6 
Above 205 
Under 610 3.2 
More than 610 6.3  62Figure 9 
 
Remarks: 1.The diameter corr esponding to abrasive wheel ( Ű) 
 
Maximum values of A (Unit: mm): 
As DÙ205  5 
As 205ÖDÙ610  7 
As D×610  10 
2.The thickness corresponding to abrasive wheel  (T) 
Maximum value of B (Unit: mm):  
As TÙ25 0.5 T  
As 25ÖTÙ50  0.4 T 
As 50ÖTÙ150  0.33 T 
As T×150  50 
 Table 34 
Thickness of abrasive wheel 
(Unit: mm) Diameter 
(Unit: mm) Numbers 
Under 150 ƚÒ 1.6 2 
ƚÒ 2.0 2 Above 150 ƚÒ 1.4 4 
Remarks: 
1. The “ t” in this table represents  the thickness of the tongue plate. 
2. If the value calculated under the diameter column is below 5mm, the value of 5mm will be 
taken.