BALLSCREW ACTUATORS
A ballscrew actuator of KURODA is a compact single-axis unit consisting of a ballscrew and a slide guide. With its slide block set in U-guide rail, the actuator has
achieved low-profile design and compact shape, making it possible to considerably
reduce necessary space as compared with the usual table type structure. Despiteof its compact structure, the actuator with U-guide rail shows high rigidity against
bending moment and deflection, and it can be applied to a st ructure supported by
one end. The linear motion unit, which is gothic arched and in 4 points-contact
structure, makes it possible to deliver high precision and high rigidity.

POSITIONS OF BALLSCREW ACTUATORS
High

High

SG series

Aluminum-frameballscrew actuators

SG series

Speed

Rigidity

SE/SC series

Aluminum-frameballscrew actuators

Accuracy

Low

High

SE/SC series

Accuracy

Low

High

WIDE VARIATIONS
Model No.
Performance
grade (Note 1)
Screw shaft dia. (mm)1

SG series

SE series

P: Repeated positioning accuracy ±1μm
H: Repeated positioning accuracy ±3μm
6

8

10

12

15

20

◎

2
5

◎
◎

H: Repeated positioning accuracy ±3μm (Note 3)
U: Repeated positioning accuracy ±5μm
W: Repeated positioning accuracy ±10μm
6

8

10

◎
●
◎

◎

●

◎

◎

◎

●

●

6
10

8

10

●

◎

●

◎

●

◎

◎

◎

◎

◎

8
20

15

15

◎

4
Lead
(mm)

SC series (Note 2)

SG20 SG26 SG33 SG3320 SG46 SG55 SE15 SE23 SE30 SE45 SC23 SC30 SC45

●
◎
◎

◎

◎
●

◎

●

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎：In-stock items●：Manufactured by order(Note 1) The above table shows precision information on repeated positioning accuracy in particular, as an example.
Performance of actuators may be diﬀerent from the values shown above, depending on applied options and usage.
For other precision information, refer to description pages for each series.
(Note 2) SC series is a full-cover version of SE series ballscrew actuators.
For more information, refer to Front matters 5 to 6, and pages 99 to 121.
(Note 3) There is no Performance Grade H in SE30 and SC30 leads 6mm and 20mm.

Front matter 2

FEATURES OF SC SERIES (FULL-COVER TYPE)
Full-cover type SC series, built on KURODA SE series, has remarkably improved its dust-preventive performance.
Structure

Coupling cover

Side coverCentral grease ﬁller hole

Table cover

Motor bracket

Center sheet

Table

Side cover

Guide rail

Housing■ Remarkably improved dust prevention!
Compared to SE series with dustproof cover, dust prevention has been remarkably improved through making clearance on side face ofactuator as narrow as it can be and effectively applying new center sheet designed to straddle the tables, so as to prevent entry of dust.
Center sheet is a flexible stainless sheet having a structure
to keep its position and to prevent it from being lifted.

Sheet magnet is used for attracting
center sheet to keep its position.

Center sheet Table
Table cover

Clearance on side face

Side cover(both sides)
Guide rail
Table

For further improved dust prevention, a wiper can be
optionally equipped so that a gap between bottom oftable cover and side cover/center sheet is filled.

Table cover
Wiper

Center sheet

Table

Table cover

Wiper

Side cover(both sides)
Guide rail

Guide rail

■ Down-sized body meeting space-saving needs!
SC series has full-cover type body with the same width and dimensions as SE series' guide rail.
Replacing SE series with the full-cover type SC series requires just the same mounting space (width) as SE series (Note that mounting height is different).

■ Easy maintenance!
In order for more efficient grease-up work, which is usually found cumbersome, a central grease filler hole is provided on the side faceof the table, as standard equipment of SC series.
Supplying grease to ball screws and guide parts can be completed at a time through the central grease filler hole. (A plug is equippedwith standard spec. model).
Grease nipple to be attached to grease filler hole is available as an option. (For more information, refer to pages 108, 114, and 120.)■ Guide with remarkable rigidity!
Having steel U-guide rails similar to SG/SE series, SC series shows high rigidity despite of its compact structure, and it can be applied
to a structure supported by one end. (For more information, refer to front matter 11.)

Front matter 5

KEY COMPONENTS AND MATERIALS OF SC SERIES
②

④
⑤
⑥
①

⑦

③

⑧

No.

Part name

Material①

Motor bracket

Aluminum alloy

Anodized treatment②

Coupling cover

Aluminum alloy

Anodized treatment③

Guide rail

Carbon steel

Black coating④

Side cover

Aluminum alloy

Anodized treatment

⑤

Table

Aluminum alloy

Anodized treatment⑥

Table cover

Synthetic resin⑦

Center sheet

Stainless steel⑧

Housing

Aluminum alloy(Note 1) Ball screws used for SC series have the same specifications as SE series.
(Note 2) Stainless steel is used for bolts and screws to joint components of actuator.

Front matter 6

Remarks

Anodized treatment

SUMMARY OF ACCURACY INDICATORS
Performance of ballscrew actuators are shown using various accuracy indicators described below.
For details in tolerance of the accuracy indicators, refer to table of performance (accuracy) information for each series.

● Repeated positioning accuracy
Repeat positioning of slide block in the same direction 7 times,
measure stop position of slide block and halve maximum difference between obtained readings. Perform this measurement at
the center and both ends of travel distance. Maximum value
among obtained value is used as measured value.
Repeated positioning accuracy＝±1/2 ((maximum value ofn) - (minimum value ofn))Position slide block properly in a fixed direction and use theobtained position as datum point. Perform positioning of slide
block in the same direction and measure difference between
actual traveling distance of slide block from datum point and distance ordered to be traveled from datum point. Perform this measurement throughout stroke range and use maximum value.
Positioning accuracy＝(Δn) maxActual traveling distanceof slide block- Ordered travelling distance● Positioning accuracy

Travelling distance● Traveling parallelism B
Fix indicator at the center of slide block and apply it to surface
plate equipped with guide rail. Move slide block throughout trav-

Traveling parallelism B

eling distance and use maximum distance among readings of test
indicator as measured value.

● Backlash
Move slide block by rotating ball screw shaft and read test indicator when slide block is slightly moved and use its reading as
reference value. Move slide block from this state in the same
direction by pressuring prescribed load and measure difference
between reading of test indicator with load removed and reference value. Perform this measurement at the center and bothends of traveling distance and use maximum value as a measured value.
Backlash＝Δ・Firmly tighten the fixed part and connection of theballscrew actuator.
Improper mounting of the body may adversely affect safety
and accuracy depends on the circumstances.
Front matter 8

Backlash
ReturnMove feed screw

Loaddisplacement

REFERENCE DATA ON ACCURACY
ACCURACY OF UNIT PRODUCT● Lost Motion
Perform positioning in a positive (or negative) direction and measure the position ( 1). Move the slide block in the same direction
and perform positioning in a negative (or positive) direction andmeasure the position ( 1'). Move it further in the same direction
and thereafter repeat the procedure in the positive and negative
directions seven times each. Obtain the differences of the average values of the stop positions. Conduct this measurement for
the entire moving range and use the obtained maximum value asa measured value.

● Traveling Parallelism A
In the case of ballscrew actuators:
Set dial gauge on surface plate, fix indicator on top of slide
block, obtain the maximum difference of dial gauge readings inmeasurable moving range in longitudinal direction of slide block.
And use it as a measured value. Since the measurable range issmall for ballscrew actuators, Traveling Parallelism B is used as
the measurement method for all of the cases except for a few
exceptions.

In the case of X-Y stages:
Set dial gauge on surface plate, fix indicator at the center oftable, obtain the maximum difference of dial gauge readings inentire moving range in X-Y direction. The maximum difference isused as a measured value.

Front matter 9

REFERENCE DATA ON ACCURACY
ACCURACY OF UNIT PRODUCT● SquarenessIn case squareness cannot be measured on the table top:
Set a dial gauge on the table top. On surface plate close to thetable travel range, fix a square gauge in parallel to X (or Y) travel

Table top

direction.
Place a fix indicator against the side of square gauge parallel toY (or X) travel direction. The maximum reading value of the dialgauge in the entire travel range is a measured value of squareness.

Surface plate

In case squareness can be measured on the table top:
Set a dial gauge on surface plate. On the table top, fix a squaregauge in parallel to X (or Y) travel direction.
Place a fix indicator against the side of square gauge parallel to

Square gauge

Square gauge

Y (or X) travel direction. The maximum reading value of the dialgauge in the entire travel range is a measured value of squareness.

Table top

Surface plate

Front matter 10

RIGIDITY
Linear motion units of SG, SE, and SC series, having gothic-arched grooves and 4 points-contact structure on guide rails and slide
blocks, have attained high rigidity. Displacement by each radial load in each size with long block configuration is shown below as areference.

Gothic arch shape
4 points-contact structure● Displacement of Slide block by Radial Load
SE/SC series

SG series

Displacement of slide block (mm)

SG20
0.004

SG26
SG33

SG46
SG55

0.003
0.002
0.001
0
0

200

400
600
Load (N)

800

1000

Displacement of slide block (mm)(Radial play 0μm)

0.005

SE23、SC23

0.005(Radial play 0μm)

SE15
0.004
SE30、
SC30

0.003

SE45、
SC45
0.002
0.001
0

0

200

400

600
Load (N)

800

1000

● Sectional Secondary Moment of Guide RailThe following table shows sectional secondary moments of guide rails in each size.

Sectional secondary moments (mm4)Mass(kg/100mm)

Model No.

IX
(X axis)ＩY(Y axis)SG20

6.50×103

6.00×104

0.250

SG26

4

1.69×10

1.47×10

5

0.380

SG33

5.11×104

3.42×105

0.600

SG46

5

2.42×10

1.49×10

6

1.240

SG55

5

2.29×10

2.28×10

6

1.500

SE15

3

2.71×10

2.36×10

4

0.147

SE23, SC23

1.44×104

1.37×105

0.410

SE30, SC30

3.88×104

3.14×105

0.560

SE45, SC45

5

6

1.110

1.45×10

1.26×10

Front matter 11

OPTION AND MANUFACTURING BY ORDER
Category

Item
Motor Intermediate ﬂange
bracketR0/RN type bracket (Note 1)
conﬁguration Parallel motor mounting unit
Dustproof coverStandard full-cover (Note 2)
Type ofcover Full-cover with grease nipple (Note 2)
Full-cover with wiper (Note 2)

OptionSensorSG series
SE series
SC series
SG20 SG26 SG33 SG46 SG55 SE15 SE23 SE30 SE45 SC23 SC30 SC45
○

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○

Full-cover with grease nipple and wiper (Note 2)

─

─

─

─

─

─

─

─

─

○

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Photo-microsensor Ass'y

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Proximity sensor Ass'y

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Sensor rail Ass'y

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Surface treatment (Note 3)

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Dust preventive grease

○

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Dowel pin hole (slide block)

○

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─

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─

─

─

Dowel pin hole (guide rail)

○

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─

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Lubrication unit LUBSEALTM

─

─

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─

─

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Reversed guide rail reference surface

─

─

─

─

─

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Sub guide rail

─

─

─

─

─

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Intermediate stroke

●

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●

Oil hole (Note 4)

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Motor bracket conﬁguration (Note 6)

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●

Sensor options (Note 7)

●

●

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●

●

XY bracket
Manufactured Motor assemblingby orderLong rail conﬁguration(Note 8)Grease options (Note 5)○: Option
─: Not available●: Manufactured by order(Note 1) R0 type bracket is applied to SG series and RN type is applied to SE and SC series.
(Note 2) Full-cover type with wiper and with grease nipple is applied only to SC series.
(Note 3) Anti corrosive black coating (ﬁlm thickness 1-2μm) is provided as surface treatment.
(Note 4) Oil hole for SG and SE series is applied to the conﬁguration with sub-table.
(Note 5) Any grease application other than standard or option grease applications will be provided on a manufactured byorder basis.
(Note 6) Ballscrew actuator with motor bracket or intermediate ﬂange conﬁguration other than standard or option
conﬁguration will be provided on a manufactured by order basis.
(Note 7) Ballscrew actuator requiring a sensor other than option conﬁguration or two sensors attached on both ends will
be provided on a manufactured by order basis.
(Note 8) For ballscrew actuators to be provided on a manufactured by order basis, speciﬁcations will be determined after
consultation with customers. Please consult KURODA after completing the Speciﬁcation Data Sheet attachedat the end of this catalog.

Front matter 12

HOW TO INTERPRET MODEL NO.
Model No.

Lead

Slide block

SG33

10

A

①

②

③

Guide rail length Performance grade

-

500

P

④

⑤

Motor bracket configuration Type of cover-Sensor

A1

C

C

⑥

⑦

⑧

Model No. of Main Body

Surface treatment

Grease

N

N

⑨

⑩

-

Dowel pin hole

-

PS
⑪

Model No. of Option① Model of ballscrew actuator
The 2-digits number represents height of mounting surface, from the bottom face of guide rail to top face of slide block.
(For SG/SE series with dustproof cover and SC series, Model No. of the unit used as base of the body is shown.)
SG series
SE series
SC series

SG20
SE15
SC23

SG26
SE23
SC30

SG33
SE30
SC45

SG46
SE45

SG55

② Lead of ball screw
Permissible speed varies depending on the lead. For more information, refer to dimensions of each series.
Lead
1mm
2mm
4mm
5mm
6mm
10mm
20mm

SG20
○

○

SG26

SG series
SG33
SG46

SG55

○
○

○
○
○

SE15
○
○

SE series
SE23
SE30
○
○

○
○

○

○
○
○
○
○

SE45

SC23
○

○

○

○
○

SC series
SC30
SC45

○
○
○
○
〇

○
○
○

③ Variation of slide blocks and number of blocks to be mounted
For configuration with 2 slide blocks, a driving block and driven block in combination is mounted. For more
information, refer to dimensions of each series.
④ Guide rail length
For more information, refer to dimensions of each series. Please note that the guide rail length is different from overall
length or maximum stroke length of actuator.
Model No.
Standard guide rail length
SE15
100
150
200
SE23
150
200
250
300
SE30
150
200
300
400
500
600
700
SE45
340
440
540
640
740
840
940
SC23
150
200
250
300
SC30
150
200
300
400
500
600
700
SC45
540
640
740
840
940
SG20
100
150
200
SG26
150
200
250
300
SG33
150
200
300
400
500
600（Note1）
SG46
340
440
540
640
740
840（Note1）
940（Note1）（Note1）（Note1）
SG55
980
1080
1180
1280
1380
(Note 1) Only available in Performance Grade H.
(Note 2) Guide rail length 750mm for SE30 and SC30 is only available in lead 10mm.

750（Note2）

750（Note2）

1040（Note1）1140（Note1）1240（Note1）⑤ Performance of ballscrew actuators, including various positioning accuracy indicators and traveling parallelism
For more information on accuracy, refer to a table of accuracy information for each series.
⑥ Motor bracket configuration
Intermediate flange may be used in combination with basic configuration. For more information, refer to a table ofmotor bracket configurations and motor option for each series.
⑦ Type of cover
For more information, refer to dimensions of each series.
⑧ With or without sensor / type of sensor
For more information, refer to dimensions of each series.
⑨ With or without surface treatment applied on guide rails and ball screws
With standard specifications (Symbol N), only guide rails are treated with black coating (except for guide rails madefrom stainless steel).
⑩ Type of grease applied on slide blocks and ball screws of ballscrew actuators
With standard specifications, Multemp PS No.2 Grease (KYODO YUSHI CO., LTD.) is contained.
⑪ Additional options such as reversed reference surface and dowel pin holes
Left blank when additional options are not included.
Front matter 13

TM⁅⁧⁛⁦⁓⁔⁞⁗‒⁘⁡⁤‒⁥⁗ ⁛⁕⁡⁠⁖⁧⁕⁦⁡⁤‡⁞⁛⁣⁧⁛⁖‒⁕⁤⁫⁥⁦⁓⁞‒ ⁓⁠⁧⁘⁓⁕⁦⁧⁤⁛⁠⁙‒ ⁓⁕⁚⁛⁠⁗⁥„‒ ⁓⁕⁚⁛⁠⁗‒⁦⁡⁡⁞⁥‒⁓⁠⁖‒⁓⁧⁦⁡ ⁡⁔⁛⁞⁗‒⁢⁤⁡⁖⁧⁕⁦⁛⁡⁠‒⁘⁓⁕⁛⁞⁛⁦⁛⁗⁥†‚‾⁧⁔⁤⁛⁕⁓⁦⁛⁠⁙‒⁙⁤⁗⁓⁥⁗‒⁛⁥⁘⁛⁞⁞⁗⁖‒⁡⁠⁞⁫‒⁓⁦‒⁦⁚⁗‒⁗⁓⁤⁞⁫⁡⁢⁗⁤⁓⁦⁛⁡⁠‒⁥⁦⁓⁙⁗†‛‚⁀⁡‒⁞⁧⁔⁤⁛⁕⁓⁦⁛⁠⁙‒⁙⁤⁗⁓⁥⁗⁛⁥‒⁘⁛⁞⁞⁗⁖†‛⁅⁗⁤⁛⁗⁥⁅‷⁅‵

Front matter 14‿⁡⁖⁗⁞‒⁀⁡†
⁅‷․‥
⁅‷‥•
⁅‷…‧
⁅‵․‥
⁅‵‥•
⁅‵…‧

‾⁗⁓⁖
․„‒‧
…„‒‧„‒‣•‧„‒‣•„‒․•․„‒‧…„‒‧„‒‣•‧„‒‣•„‒․•⁆⁫⁢⁗‒⁡⁘‒⁅⁞⁛⁖⁗‒‴⁞⁡⁕⁝‾⁡⁠⁙‒‴⁞⁡⁕⁝‾⁡⁠⁙‒‴⁞⁡⁕⁝„‒⁅⁚⁡⁤⁦‒‴⁞⁡⁕⁝‾⁡⁠⁙‒‴⁞⁡⁕⁝‚⁇⁠⁛⁦‬‒ ‛″⁢⁢⁞⁛⁕⁓⁔⁞⁗‒‹⁧⁛⁖⁗‒⁄⁓⁛⁞‒⁞⁗⁠⁙⁦⁚‚‒‛․••‟‥••․••‟ ‧•‥…•‟‫•…‫‬․••‟‥••․••‟ ‧•‧…•‟‫•…‫‬

⁅‷‒⁥⁗⁤⁛⁗⁥⁅‵‒⁥⁗⁤⁛⁗⁥

Front matter 15

FOR SAFETY USE
Be sure to read the following instructions before use.
For common instructions, refer to the text of this catalog.

The following safety precautions recommend the correct usage of our products to prevent an injury and a damage.
These precautions are classified into 3 categories : "DANGER","WARNING" and "CAUTION" according to the degree of possible
injury or damage and the degree of impendence of such injury or damage.
Be sure to follow all these precautions, as they include important contents regarding safety.

DANGERWARNINGCAUTION

Indicates an impending hazardous situation

Indicates a potentially hazardous situation that

Indicates a potentially hazardous situation thatthat may arise due to improper handling or

may arise due to improper handling or opera-

may arise due to improper handling or opera-

operation and could result in a serious injury

tion and could result in a serious injury ortion and could result in an injury or property

or death.

death.

damage only.

Be sure to obey "Labor Safety and Sanitation Law" and other safety rules and regulations in addition to these precautions.
There is some situation that may lead to a serious result according to circumstances, even if it is mentioned in the
category of "CAUTION". Be sure to follow these precautions, as they contain important matters.

WARNING• Select a ballscrew actuator properly.
As operating conditions for products mentioned in this catalog are diversified, the applicability of ballscrew actuator to the intended system should bedetermined by the total system designer or the person who determined specifications for such system after conducting an analysis and testing asnecessary.
The person who determined the applicability of the system shall be responsible for assuring the intended system performance and safety. When configuring a system, the system designer should thoroughly examine all specifications for such a system by referring to the latest product catalog anddata, and also take into consideration the possibility of equipment troubles.

• The ballscrew actuator should be handled by persons who have sufficient knowledge and rich experience.
Thoroughly read this catalog and operation manual before use.
· Never disassemble the ballscrew actuator. Dust can enter the inside, degrading the accuracy of the module and causing an accident. When theballscrew actuator has been disassembled from necessity, return it to our company for repair and reassembling. (In this case, repairing charges are
required.)· When mounting a ballscrew actuator to a machine and dismounting it from machine, check that a fall prevention means has been taken and themoving part of the machine has been fixed beforehand.

• When using the ballscrew actuator in the following conditions or environments, take the proper safety measures and consult KURODA beforehand.
· Conditions and environments other than specified and outdoor use.
· Applications to nuclear power equipment, railroads aircraft, vehicles, medical equipment, equipment connected with food and drink, and the likes.
· Applications which require extreme safety and will also greatly affect men and property.

• During operation, make sure to keep your hands away from either of stroke ends, where slide block moves,to prevent your finger from being caught.
• During operation, make sure to keep your hands away from screws and axis terminals of ball screw shaft,which are rotating parts, to prevent your hands from being caught.
• Pay adequate attention not to allow the actuators to be used for military purpose including for arms andweapons.

Front matter 16

BALLSCREW ACTUATOR/COMMON INSTRUCTIONS
Be sure to read the following instructions before use.
Also refer to "FOR SAFETY USE".

DESIGNWARNING• Especially when there is the possibility that the ballscrew
actuator is dangerous to the human body, provide it with aprotective cover.
When there is the possibility that the load and the moving part of theballscrew actuator are dangerous to the human body, design the structure toprevent the human body from touching such load and moving part directly.

• Firmly tighten the fixed part and connection of the ballscrew
actuator.Improper mounting of the body may adversely
affect safety and accuracy according to circumstances.
• Take into consideration the behavior of the ballscrew actuator in an emergency.
When the machine is immediately stopped in an emergency by a person or
by a safety device in case of power failure or system trouble, the motion of
the module can injure the human body and can damage the machine. So
design the machine to prevent an injury to the human body and a damage
to the machine.

SELECTIONWARNING• Check specifications.
Be sure to use the ballscrew actuator within the given specifications.

• When selecting a rigid type as coupling for connecting a
motor, consult KURODA.

MOUNTING

CAUTION• Be careful not to dent and flow the body and the mounting
surface of the table, side cover, and center sheet.
Such dent or flaw will degrade parallelism of mounting surface, resulting inrattling of the guide and increased slide resistance. Note that, since thecenter sheet of SC series are very thin, such dent or flaw may ruin its dust
preventive capability or lead to damage of the sheet function.

• When connecting the ballscrew actuator to a load with an
external support or guide, do so in accordance with a proper connecting method and perform centering satisfactorily.
• When mounting a load, do not apply an excessive shock or
moment.
If the ballscrew actuator receives external force exceeding the permissible
moment, the guide will loosen and sliding resistance will increase.

• Do not start the system until it is confirmed that theballscrew actuator works properly.
After mounting the ballscrew actuator, perform an appropriate functional test
and make sure that it is correctly mounted and works safely without fail before
starting the system.

• Although corners of components, such as motor bracket,
housing, side cover, and center sheet, are beveled, pay
enough attention not to hurt yourself when handling them.

OPERATING ENVIRONMENTDANGER• Do not use the ballscrew actuator in a place where an
explosive atmosphere exists.

WARNING• Do not use the ballscrew actuator in an atmosphere containing corrosive gases, chemicals, seawater, water andvapor and in a place where it can be stained with such matters.
• When using the ballscrew actuator in a place where it is
exposed to dust, cuttings, spatters, etc., fit a protective
cover or other protector.
• Do not use the ballscrew actuator in a vibratory or shockable place ; otherwise causing a bad condition or breakdown.
When using the ballscrew actuator in such an environment, consult KURODA.

CAUTION• Since the SC series is equipped with sheet magnet on side
covers for attracting center sheet to keep its position, be
careful not to have the magnet contaminated with ironpower or metallic fragments.

LUBRICANTS

CAUTION• Unless otherwise specified, the nut contains Multemp PS
No.2 Grease (KYODO YUSHI CO., LTD.) as a lubricant.
• Checking and supplying lubricant
Check the lubricant 2 to 3 months after the ball screw is used for the firsttime. If it is extremely dirty, wipe off old grease and apply new grease.
Then, check and supply the lubricant once every year as a general rule.
However, as the service life of lubricants varies according to operating
conditions and environment, adjust the intervals properly.
When feeding additional grease (lubricant), use the same brand of grease
as initially contained.
With SC series, a central grease filler hole (M3) is provided on side surfaceof table, making it possible for the grease to be supplied to ball screw andguide through the filler hole.
Supply additional grease as necessary, preferably with the interval indicated above. When adding grease, 2 dispenses by grease gun (approx. 1 to
2 cc) should be supplied.
After supplying additional grease, operate the table to the extent of fullstroke to apply the grease over the component. Wipe off excess greaseattached around the central grease filler hole.

• Do not use at high temperature over 60 celsius degree.
As resin is used in ballscrew actuator, use at lower temperature than 60
celsius degree. For ballscrew actuator with sensor, use at lower temperature than 55 celsius degree.

Front matter 17

FULL-COVER TYPE BALLSCREW ACTUATORS/SC SERIES
Variations, Model No. ……………………………………………………………………………… 100
Specifications ………………………………………………………………………………………… 101
Accuracy ……………………………………………………………………………………………… 102
Inertia ………………………………………………………………………………………………… 103
SC23 Long block configuration ………………………………………………………………… 104
Long block configuration, dimensions, permissible speed and mass ……………… 105
Sub guide rail configuration ……………………………………………………………… 106
Sub guide rail configuration, dimensions, permissible speed and mass …………… 107

SG SG20 SG26 SG33 SG46 SG55

CONTENTS

Cover configuration ………………………………………………………………………… 108

SE

Sensors and sensor rails ………………………………………………………………… 109(Note) For motor bracket configurations, refer to pages 68 to 71 in SE series section.

SE15 SE23 SE30 SE45

SC30 Long block configuration ………………………………………………………………… 110
Long block configuration, dimensions, permissible speed and mass ……………… 111
Sub guide rail configuration ……………………………………………………………… 112
Sub guide rail configuration, dimensions, permissible speed and mass …………… 113
Cover configuration ………………………………………………………………………… 114
Sensors and sensor rails ………………………………………………………………… 115(Note) For motor bracket configurations and parallel motor mounting, refer to pages 78 to 81
in SE series section.

SC SC23 SC30 SC45

SC45 Long block configuration ………………………………………………………………… 116
Long block configuration, dimensions, permissible speed and mass ……………… 117
Sub guide rail configuration ……………………………………………………………… 118
Sub guide rail configuration, dimensions, permissible speed and mass …………… 119
Cover configuration ………………………………………………………………………… 120
Sensors and sensor rails ………………………………………………………………… 121(Note) For motor bracket configurations and parallel motor mounting, refer to pages 92 to 95
in SE series section.
Sensor specifications - Photo-microsensor S, M, Y …………………………………………… 122

SensorSensor specifications - Proximity sensor K, E…………………………………………………… 123
Sensor specifications - Photo-microsensor C, P, H, J ………………………………………… 124

Technical Data
99

SG
SG55 SG46 SG33 SG26 SG20

VARIATIONS
Model No.
Performance
grade
Screw shaft dia. (mm)

Lead
(mm)

SC23

SC30

H: Repeated positioning accuracy ±3µm(Note 1) (Note 2)
U: Repeated positioning accuracy ±5µm(Note 2)
W: Repeated positioning accuracy ±10µm(Note 2)
8

10

2

◎

●

4

●

◎

5

◎

◎

6
8

SC45

15

◎

◎
●

10

◎

◎

20

◎

◎

◎: In-stock items●: Manufactured by orderSE

HOW TO INTERPRET MODEL NO.

SC45 SC30 SC23

SC

(Note 2) Performance may be different from the values shown above, depending on applied options and usage.

SE45 SE30 SE23 SE15

(Note 1) There is no Performance Grade H in SC30 leads 6mm and 20mm.

SC30
│
①

05
│
②

A
│
③

-

① Model ② Lead
① Model② Lead② Sub guide rail
SC23
2，5
SB
SC30 4，5，6，10，20SBSC45
5，10，20
SB③ Slide block

150
│
④

-

A1
│
⑥

N
│
⑦

N
│
⑧

⑥ Motor bracket configuration
Model Motor bracket configuration Sub guide rail
SC23 A0，
A1，
A2，
A3，
A5，
A6，
A7
NN
A0，
A1，
A2，
A3，
A4，
A5，
A7，
SC30
NN
B1，
RN，
E□，
F□
A0，
A1，
A2，
A3，
A4，
A5，
A6，
SC45
NN
RN，
E□，
F□，
G□

Model
Slide block
SC23
A：With 1 long block
SC30
E: With 1 long block (LUBSEAL)
SC45④ Guide rail length (Note 1) (Note 2)
Model
Guide rail length (mm)SC23 150，200，250，
300
150，200，300，
400，
500，
SC30
600，700*，750*
SC45 540，640，740，
840，
940

SensorU│⑤⑤ Performance grade (Note 3)
H
U

Repeated positioning accuracy±3µm
Repeated positioning accuracy±5µm

WL

Repeated positioning accuracy±10µm
Sub guide rail-

Standard coverWith grease nipple
With wiper

D

With grease nipple and wiper

N
│
⑩

-

PR
│
⑪

⑨ Surface treatment (Note 4)
N
L

Standard treatment
Anti corrosive black coating⑩ Grease (Note 5)
ModelGreaseSC23 N: Standard grease
SC30 S: Dust preventive
KURODA S grease
SC45⑦ Type of cover
N
G
S

N
│
⑨

⑪ Additional options⑧ Sensor
Sensor
N: Without sensor
S: Photo-microsensor
SC23
K，
E: Proximity sensor
1: For sensor rails only
N: Without sensor
SC30
M，
Y，
C，
P: Photo-microsensor
K，
E: Proximity sensor
SC45
1: For sensor rails only

Blank
PR
ML

Model

MPR

No dowel pin hole
For guide rail only
For reversed guide rail
reference surface
For both reversed guide rail
reference surface andguide rail

Technical Data

(Note 1) For specifications of guide rail with long rails or intermediate stroke with non-standard length, consult KURODA.
(Note 2) The SC30 rail lengths marked with "*" are not available in Performance Grade H.
(Note 3) There is no Performance Grade H in SC30 leads 6mm and 20mm.
(Note 4) With standard specifications of surface treatment (Symbol: N), only guide rails are treated with black coating.
(Note 5) With standard grease (Symbol: N), Multemp PS No.2 Grease (KYODO YUSHI CO., LTD.) is contained in slide
block and ball screw components.
(Note 6) With Lubrication unit LUBSEAL specifications refer to Front matters 14 to 15.
100Model no.

SC2302 SC2305 SC3004 SC3005 SC3006 SC3010 SC3020 SC4505 SC4510 SC4520

Performance grade

W U H W U H W U H W U H W U W U H W
−3〜0
−3〜0
μm

Radial clearance

U W U H W U H W U H−5〜0

Basic dynamic load rating C

kN

4.3

7

27

Basic static load rating C0

kN

7.0

11.8

45.0

29

43

68

51

107

194

61

84

250

Guide Long
block Static
permissible
moment

MP
M

Y

N・m

MR

Shaft diameter

mm

Lead

Ball
screw Basic dynamic load rating Ca

mm
kN

Basic static load rating C0a

kN

8
2

15

10
5

10

20

5

4

5

6

10

20

1.8

1.9

3.0

3.0

3.0

2.0

2.2

5.1

5.1

3.1

3.2

3.1

5.3

5.3

5.3

3.2

3.5

10.5

10.5

6.6

708DFP5 or equivalent

5201A or equivalent

4.40

5.90

4.36

3.20

SE

Model No. of bearing
AC6-16DF or equivalent
Fixedside Basic dynamic load rating Cb kN
1.79
bearing Basic static load rating C0b kN
1.76

SG SG20 SG26 SG33 SG46 SG55

SPECIFICATIONS

SE15 SE23 SE30 SE45

(Note 1) Static permissible moment shows rigidity value based on dimensions and material of table.
(Note 2) There is no Performance Grade H in SC30 leads 6mm and 20mm.

DIRECTION OF MOMENT
ＭＹ

ＭＰ
ＭＲ

SC SC23 SC30 SC45
SensorTechnical Data
101

ModelNo.

SC23

Repeated positioning accuracy Positioning accuracy Travelling parallelism B
(μm)
(μm)
(μm)
W

U

H

200
250

SC30

±10

±5

±3

U
75
85

300

90

150

70
80

300

±3

90

400

（±5）

95

500

±10

±5

100

600

110

700

−

750

SC45

W

120
130

540

110

640

120

740
840

H

W

U

Backlash(μm)

Starting torque (Note 2)
(N・m)

H

W

U

H

W

U

H

20

5

5

0.03 0.06 0.06

5

0.15

70

200

±10

±5

±3
（±5）

940

130
150
170

60

15

15

60

15

15
20

100

5

0.07 0.15

25
25

−
100

−
40

20
50

−

40

120
150

−

5

5

0.1

0.2

0.2

50

(Note 1) Measurement is to be performed with KURODA's specified motor mounted.
(Note 2) Above starting torque value is applied when the standard grease is used. The value may change depending on
the properties of the grease.
(Note 3) For repeated positioning accuracy, the value in parentheses is for parallel motor mounted configurations.

SG
Technical Data

Sensor

SC45 SC30 SC23SCSE45 SE30 SE23 SE15

Guide rail
length
(mm)
150

SE

SG55 SG46 SG33 SG26 SG20

ACCURACY102

Inertia for slide block and ball screw of ballscrew actuator is shown in the following table.

Model No.

SC2302SC2305SC3004

SC3020SC4520Technical Data

SC4510SensorSC4505SC SC23 SC30 SC45SC3010

SE15 SE23 SE30 SE45

SC3006

150
200
250
300
150
200
250
300
150
200
300
400
500
600
700
150
200
300
400
500
600
700
150
200
300
400
500
600
700
150
200
300
400
500
600
700
750
150
200
300
400
500
600
700
540
640
740
840
940
540
640
740
840
940
540
640
740
840
940

Full-cover typeLong block
A: 1 block0.06160.0773
0.09300.10900.0756
0.09130.10700.1230
0.165
0.204
0.280
0.357
0.434
0.510
0.587
0.176
0.214
0.291
0.367
0.444
0.521
0.597
0.188
0.227
0.303
0.380
0.457
0.533
0.610
0.261
0.299
0.376
0.453
0.529
0.606
0.683
0.721
0.602
0.640
0.717
0.793
0.870
0.947
1.023
2.43
2.81
3.20
3.59
3.98
2.68
3.07
3.46
3.84
4.23
3.69
4.08
4.47
4.86
5.24

SE

SC3005

Guide rail length (mm)(Unit : ×10−5kg・m2)

SG SG20 SG26 SG33 SG46 SG55

INERTIA103

75

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)

30

5.5

＋0.0182-φ4 0depth 619
38

4-M4 depth 6Overall length L2

51.2

Guide rail length L1

9(39.3)

47

52

Maximum stroke(44.3)

44
25

SE45 SE30 SE23 SE15

4.9

P2
M2×P2

50.5

N2

2×(M2＋1)-M3 depth 4 (both sides)
2×(M1＋1)-M4 tap hole
N1

M1×P1

P1

Slide block

0.5

5.9

SC45 SC30 SC23SC

Guide rail

25

SG

● FULL-COVER TYPE LONG BLOCK CONFIGURATIONSSE

SG55 SG46 SG33 SG26 SG20

SC23

Technical Data

SensorLength of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)104

● FULL-COVER TYPE LONG BLOCK DIMENSIONS
Guide rail length Overall length

Maximum stroke
N1

M1×P1

N2

211

35

1×80

25

200

261

20

250

311

45

300

361

30

L1

L2

150

50

2×80

25

3×80

50

M2×P2
1×100
2×100

(Unit: mm)

Long block

Long block (with LUBSEAL)

A: 1 block

E: 1 block

66

─

116

110

166

160

216

210

● PERMISSIBLE SPEED / MASS

200
250
300

Full-cover type
A: With 1 long block

Mass of table(slide block + table + table cover parts)

1.20
200

490

1.41
1.63

SE15 SE23 SE30 SE45

150

Mass (kg)SE

Guide rail length Permissible speed (mm/s)
L1
Lead
(mm)
2mm
5mm

SG SG20 SG26 SG33 SG46 SG55

SC23

0.25

1.84

(Note 1) Mass of full-cover type actuators in the above table includes mass of table.
(Note 2) For long rail configurations, please consult KURODA.

● MOTOR BRACKET CONFIGURATIONS
Please refer to Pages 68 to 71 of SE23 series regarding to motor bracket configurations.

SC SC23 SC30 SC45

● DOWEL PIN HOLE (Guide rail only)
Please refer to Pages 73 of SE23 series regarding to guide rail positioning hole.

SensorTechnical Data105

● FULL-COVER TYPE SUB GUIDE RAIL CONFIGURATIONS
75
5.5

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)30

SG
SG55 SG46 SG33 SG26 SG20

SC23

＋0.0182-φ4 0depth 6

4-M4 depth 61938Overall length L2
Guide rail length L1

9

47

9

Maximum stroke(39.3)

7(39.3)

25

P2
50.5

4.9

44

SE45 SE30 SE23 SE15

SE

51.2

N2

M 2×P22×(M2＋1)-M3 depth 4 (both sides)

2×(M1＋1)-M4 tap holeN1

25

SC45 SC30 SC23

SC

M1×P1

Slide block

0.5

5.9

Sensor

15.4

Guide rail

Technical Data

Length of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)106

● FULL-COVER TYPE SUB GUIDE RAIL DIMENSIONS
Guide rail length Overall length

Maximum stroke
N1

M1×P1

N2

211

35

1×80

25

200

261

20

250

311

45

300

361

30

L1

L2

150

50

2×80

25

3×80

50

M2×P2
1×100
2×100

(Unit: mm)

Long block

Long block (with LUBSEAL)

A: 1 block

E: 1 block

71

─

121

115

171

165

221

215

● PERMISSIBLE SPEED / MASS
Full-cover typeLead

A: With 1 long block

250
300

Mass of table(slide block + table + table cover parts)

1.12
490

1.32
1.51

SE15 SE23 SE30 SE45

150
200

Mass (kg)Permissible speed(mm/s)SE

Guide rail length
L1(mm)

SG SG20 SG26 SG33 SG46 SG55

SC23

0.25

1.71

(Note 1) Mass of full-cover type actuators in the above table includes mass of table.
(Note 2) For long rail configurations, please consult KURODA.

SC SC23 SC30 SC45
SensorTechnical Data
107

SG
SG55 SG46 SG33 SG26 SG20

SC23
● COVER CONFIGURATIONThe below-mentioned configurations with grease nipple and/or wiper are available for full-covered series. Standard specification (Symbol: N) has a plug equipped with grease filler hole.

Full-cover type with grease nipple (Symbol: G)←Motor bracket side

SE45 SE30 SE23 SE15

5SEGrease nipple

Full-cover type with wiper (Symbol: S)

SC←Motor bracket side

SC45 SC30 SC23

Wiper (mounted inside table cover)SensorFull-cover type with grease nipple and wiper (Symbol: D)←Motor bracket side
Grease nipple

Technical Data

5

Wiper (mounted inside table cover)108

SG SG20 SG26 SG33 SG46 SG55

SC23
● SENSOR
Symbol S (NPN): Photo-microsensor (Panasonic Industrial Devices SUNX)
15
Sensor dog

5Motor bracket side→

17.9

12

Photo-microsensor

15
Sensor mounting plate

Sensor rail

SE

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)

SE15 SE23 SE30 SE45

15

5
Sensor rail

11.9

8

Sensor dog

Motor bracket side→

6
Proximity sensor
13.3

SC SC23 SC30 SC45

● SENSOR RAIL
Sensor rails only available with no sensors.
Sensor rail No. 1

7

3

5

3.5

1

Sensor

11.9

3

5

Sensor rail No. 1

Technical Data
109

Motor bracket configuration: A0
4-M3 depth 6

52
30.5

49
10

90°

10

3

D3

SE45 SE30 SE23 SE15SCSC45 SC30 SC23

SensorTechnical Data
68

15.4

34.4

7.4 11.5

φ24 H8

PC

φ5 h7

SG

● MOTOR BRACKET CONFIGURATIONSSE

SG55 SG46 SG33 SG26 SG20

SE23

43
4-3.4 drilled hole50

SG SG20 SG26 SG33 SG46 SG55

SE23
● MOTOR BRACKET CONFIGURATIONS (INTERMEDIATE FLANGE)
Motor bracket configuration: A1 (mass: 28g)
4-M4 depth 10.5
10.5

52
30.5

90°

10

40

φ5 h7

＋0.05

40

φ22

2

φ30 0

10

SE

6
D4

PC

3.5

SE15 SE23 SE30 SE45

D1
6Motor bracket configuration: A2 (mass: 12g)

PC

5.5

52
30.5

10

12

30

0°

φ10 0

12

φ8

30

0°

2
＋0.05

10

SC SC23 SC30 SC45

φ5 h7

2.5
3-3.4 drilled hole
6 spot facing depth 3.5(from back side)

Motor bracket configuration: A3 (mass: 24g)
4-M3 depth 10.5
10.5

52
30.5

90°

10

38

38

PC

D4
5

φ30

3.5

Sensor

φ5 h7

＋0.05
0

2

φ22

10

Technical Data

(Note) For A2 configuration, install the intermediate flange to motor before mounting it to actuator.

69

● MOTOR BRACKET CONFIGURATIONS (INTERMEDIATE FLANGE)
Motor bracket configuration: A5 (mass: 32g)
4-3.4 drilled hole
6 spot facing depth 4(from back side)

7

49

10

42

＋0.05

30.5

φ5 h7

31

31

2

φ16

10

23

52
30.5

φ22 0

SG
SG55 SG46 SG33 SG26 SG20

SE23

SE

2.5

4-3 drilled hole
5 spot facing depth 3(from back side)

5

52
30.5

10

49

2

2

φ5 h7

SC

＋0.05

23

φ16

10

φ22 0

SE45 SE30 SE23 SE15

Motor bracket configuration: A6 (mass: 16g)

SC45 SC30 SC23

Motor bracket configuration: A7 (mass: 8g)
3.5

52
30.5

30

10
2

17

Sensor

φ5 h7

30

φ10 0

＋0.05

10

2-2.8 drilled hole
5.5 spot facing depth 4.2(from back side)

Technical Data

(Note) For A5, A6, and A7 configuration, install the intermediate flange to motor before mounting it to actuator.

70

● MOTOR BRACKET CONFIGURATIONS AND MOTOR OPTION
Motor option
Motor type

Maker

PANASONICMITSUBISHI
ELECTRICMSME5A

50W

MSME01

100W

MINAS
A6

MSMF5A50W

MSMF01100W

MELSERVO
J3

HF-KP（MP）053

50W

HF-KP（MP）13100W

MELSERVO
J4

HG-KR（MR）053

50W

HG-KR（MR）13100W

SGMJV，SGMAV-A550W

SGMJV，SGMAV-01

100W

SGMJV，SGMAV-C2150W

SGM7J，SGM7A-A550W

SGM7J，SGM7A-01

100W

SGM7J，SGM7A-C2150W

YASKAWA
ELECTRIC
Σ-7

SANMOTION R2AA04005
R
R2AA04010
α step5-Phase2-PhaseSANYO
ELECTRIC

5-Phase

100W

A3

A1

A1
SFC-010DA2（MIKI PULLEY）
ACD-19A（ISEL）
A1

ARM2

□28mm

A6

ARM4

□42mm

A5

CRK52

□28mm

A6

CRK54

□42mm

RKS54

□42mm

PKP22

□28mm

A6

PKP24

□42mm

A5

F series□42mm

□42mm

A5

A5

・For motors other than above-mentioned, consult KURODA.
・When selecting a rigid type of coupling for connecting a motor, consult KURODA.
・For detailed specifications of above-mentioned motors and couplings, refer to catalogs or websites provided by the makers.

SC SC23 SC30 SC45

Stepping
motor

ORIENTAL
MOTOR

50W

Recommended coupling

SE15 SE23 SE30 SE45

MINAS
A5

Σ-V

SANYO
ELECTRIC

Model No.

SE

AC SERVO
motor

SeriesMotorbracketOutputconfiguration

SG SG20 SG26 SG33 SG46 SG55

SE23

SensorTechnical Data
71

● SENSOR
Symbol S (NPN): Photo-microsensor (Panasonic Industrial Devices SUNX)
Without coverWith dustproof coverSensor dog

Sensor dog

15

17.9

12

Sensor mounting plate

15 5

Sensor rail

12

Photo-microsensor

Photo-microsensor

17.9

SG
SG55 SG46 SG33 SG26 SG20

SE23

Sensor mounting plate

15

Sensor rail

20

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)
Without coverWith dustproof coverSensor dog

15

Proximity sensor

8
11.9

8

Sensor dog

11.9

SE45 SE30 SE23 SE15

SE

20

15 5

65

Sensor rail

15

Proximity sensor

13.1

SC

Sensor rail No. 1
1

3

5

3.5

3

5

Sensor rail No. 1

7

11.9

Sensor

SC45 SC30 SC23

Sensor rails only available with no sensors.

Technical Data

Sensor rail
13.1

● SENSOR RAIL

72

65

● DOWEL PIN HOLE
Dowel pin holes are applicable on the slide blocks with part number "PS", sub-tables "PR"or slide blocks and sub-tables "PSR".
For an acutuator with 2 blocks, they are on both driving-side block and driven-side block. Please note that dowel pins are notequipped.

Long block with dustproof cover with "PS"50 ±0.05

Long block without dustproof cover with "PS"2-φ2＋0.014
depth 402-φ2＋0.014
depth 40

SG SG20 SG26 SG33 SG46 SG55

SE23

Motor side

SE15 SE23 SE30 SE45

16 ±0.05

SE

16 ±0.05

Motor side

Guide rail with "PR"Guide rail lengthN

SC SC23 SC30 SC45

3 H9 throughM

φ3 H9 through5

Guide rail length

N

M

150

35

80

200

20

250

45

300

30

160

(Unit: mm)
Dowel pin heightLess than 5.9

240

Sensor

Notice: In case dowel pin is stuck out from the U-guide rail, it may interfere with and break the slide block.

Technical Data73

● FULL-COVER TYPE LONG BLOCK CONFIGURATIONS
89
40

7

＋0.0182-φ4 0depth 625

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)4-M5 depth 650Overall length L2
61.2(47.2)

57

59(52.4)

Maximum stroke

30
60.5

M2×P2

P2

5

SE45 SE30 SE23 SE15

52

SE

Guide rail length L1

9N2

2×(M2＋1)-M3 depth 6 (both sides)
2×(M1＋1)-M5 tap hole

SC

P1

8.0

SC45 SC30 SC23

Guide rail

N1

30

M1×P1

Slide block

0.5

SG
SG55 SG46 SG33 SG26 SG20

SC30

Technical Data

SensorLength of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)110

● FULL-COVER TYPE LONG BLOCK DIMENSIONS
Guide rail length Overall length
L1

L2

150

218

200

268

300

368

400

468

500

568

600

668

700

768

750

818

Maximum stroke
N1
25

M1×P1
1×100

N2

M2×P2

25

1×100

Long block (with LUBSEAL)

A: 1 block

E: 1 block

50

−

100

94

200

194

3×100

300

294

4×100

400

394

5×100

5×100

500

494

6×100

6×100

600

594

7×100

650

644

3×100

25

Long block

2×100

2×100
50

(Unit: mm)

4×100

7×100

50

25

SE

Permissible speed (mm/s)

Mass (kg)

Lead
4mm

5mm

Full-cover type

6mm 10mm 20mm

A: With 1 long block

150

1.9

200
300

Mass of table(slide block + table + table cover parts)

2.2
320

400

480

810

400

1200

500

2.9
3.5
4.2

240

300

360

600

4.9

700

170

210

250

430

910

5.5

750

−

−

−

380

790

5.8

(Note 1) Guide rail length of 750 mm is available only for SC3010.
(Note 2) Mass of full-cover type actuators in the above table includes mass of table.
(Note 3) For long rail configurations, please consult KURODA.

● MOTOR BRACKET CONFIGURATIONS
Please refer to Pages 78 to 81 of SE30 series regarding to motor bracket configurations and parallel motor mounting.

Sensor● DOWEL PIN HOLE (Guide rail only)

SC SC23 SC30 SC45

600

0.43

SE15 SE23 SE30 SE45

● PERMISSIBLE SPEED / MASS
Guide rail length
L1(mm)

SG SG20 SG26 SG33 SG46 SG55

SC30

Please refer to Pages 83 of SE30 series regarding to guide rail positioning hole.

Technical Data111

● FULL-COVER TYPE SUB GUIDE RAIL CONFIGURATIONS
89＋0.0182-φ4 0depth 6

4-M4 depth 62550Overall length L2

9Maximum stroke(47.2)

7.1(47.2)

60.5

M 2×P2P2

2×(M1＋1)-M4 tap hole
N1

M1×P1

21.3

8.0

SC45 SC30 SC23

Slide block

0.5

SC

P1

Guide rail

N2
2×(M2＋1)-M3 depth 4 (both sides)

30

30

5

52

SE

Guide rail length L1

9

61.2
57

SE45 SE30 SE23 SE15

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)

7

40

SG
SG55 SG46 SG33 SG26 SG20

SC30

Technical Data

SensorLength of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)112

● FULL-COVER TYPE SUB GUIDE RAIL DIMENSIONS
Guide rail length Overall length
L1

L2

150

218

200

268

300

368

400

468

500

568

600

668

700

768

750

818

Maximum stroke
N1
25

M1×P1

N2
25

1×100

Long block (with LUBSEAL)

A: 1 block

E: 1 block

55

−

105

99

205

199

3×100

305

299

4×100

405

399

5×100

5×100

505

499

6×100

6×100

605

599

7×100

655

649

3×100

25

1×100

Long block

2×100

2×100
50

M2×P2

(Unit: mm)

4×100

50

7×100

25

SE

Mass (kg)Permissible speed(mm/s)

Full-cover typeLead

A: With 1 long block

150

1.80

200

2.09

300

2.69

400
500

1200

SE15 SE23 SE30 SE45

● PERMISSIBLE SPEED / MASS
Guide rail length
L1(mm)

SG SG20 SG26 SG33 SG46 SG55

SC30

Mass of table(slide block + table + table cover parts)

3.28
3.87
4.46

700

5.05

750

5.35

SC SC23 SC30 SC45

600

0.43

(Note 1) Guide rail length of 750 mm is available only for SC3010.
(Note 2) Mass of full-cover type actuators in the above table includes mass of table.
(Note 3) For long rail configurations, please consult KURODA.

SensorTechnical Data
113

SG
SG55 SG46 SG33 SG26 SG20

SC30
● COVER CONFIGURATIONThe below-mentioned configurations with grease nipple and/or wiper are available for full-covered series. Standard specification (Symbol: N) has a plug equipped with grease filler hole.

Full-cover type with grease nipple (Symbol: G)←Motor bracket side

SE45 SE30 SE23 SE15SE

5Grease nipple

Full-cover type with wiper (Symbol: S)←Motor bracket side

SC45 SC30 SC23

SC

Wiper (mounted inside table cover)Full-cover type with grease nipple and wiper (Symbol: D)

Technical Data

Wiper (mounted inside table cover)114

Grease nipple
5

Sensor←Motor bracket side

● SENSOR
Symbol C (NPN) / P (PNP), M (NPN) / Y (PNP): Photo-microsensor (OMRON, Panasonic Industrial Devices SUNX)
15
Sensor dog

15.5

Photo-microsensor

5

18.5

Motor bracket side→

15

SE

Sensor mounting plate

20

Sensor rail

SE15 SE23 SE30 SE45

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)
15

Motor side

SC SC23 SC30 SC45

5 6

12.5

8

Sensor dog

Sensor rail

SG SG20 SG26 SG33 SG46 SG55

SC30

Proximity sensor

13.3● SENSOR RAIL
Sensor rails only available with no sensors.
Sensor rail No. 1

7

3

5

1

3.5

12.5

Sensor3

Technical Data

5

Sensor rail No. 1

115

● MOTOR BRACKET CONFIGURATIONS
Motor bracket configuration: A0
4-M3 depth 859
φ32 H8

10

16.5

39.3

120°

21.3

9

φ28

34

4-φ4.8
59

φ6 h7

SG
SG55 SG46 SG33 SG26 SG20

SE30

SE45 SE30 SE23 SE15

51

6.5

49

14.3

D3

2-M4 depth 10

PC

SE

8

2.5

Motor bracket configuration: RN
4-M4 depth 8

34
6

59

φ30 h821.3

SCSC45 SC30 SC23

41.3

39.5

27

27

9

φ6 h7

12

1.8

16

Technical Data

SensorMass of the RN configuration is 0.085 kg less than the value shown in the table on page 75.

78

SG SG20 SG26 SG33 SG46 SG55

SE30
● MOTOR BRACKET CONFIGURATIONS (INTERMEDIATE FLANGE)

2

φ28

40

φ28

φ30 0

＋0.05

90°

47.14

D4

6

2

4-M4 depth 7

47.14

3.5

7

□56.4

42

＋0.08

4-M4 depth 10

10Motor bracket configuration: A5 (mass: 46g)
φ38.1＋0.03

Motor bracket configuration: A1 (mass: 25g)

PC

2

3.5

42

Motor bracket configuration: A7 (mass: 64g)
1090°

4-M5 depth 10
3.5

90°

□60

＋0.05

D7

PC

PC

D4

0

2

5

2

φ50 0

φ28

40

φ28

φ30

＋0.05
0

SE15 SE23 SE30 SE45

4-M3 depth 10

10SEMotor bracket configuration: A2 (mass: 25g)

Motor bracket configuration: B1 (mass: 37g)
4-3.4 drilled hole
6 spot facing depth 3.5(from back side)

4-M4 depth 10

10

90°

3

SC SC23 SC30 SC45

Motor bracket configuration: A3 (mass: 55g)

7

59

42

D6

0

2

31

φ22 0

□54

＋0.05

φ50 0

φ28

＋0.05

31

PC

2

SensorMotor bracket configuration: A4 (mass: 71g)

50

□60

φ36

50

(Note) For B1 configuration, install the intermediate flange2

to motor before mounting it to actuator.
79

Technical Data

φ28

2.5

＋0.05
0

4-M4 depth 10

10

SG

● MOTOR BRACKET CONFIGURATIONS AND MOTOR OPTION
Motor option
Motor type

Maker

PANASONICMITSUBISHI
ELECTRIC

AC SERVO
motor

MSME5A

50W

MSME01

100W

MINAS
A6

MSMF5A50W

MSMF01100W

HF-KP（MP）053

50W

HF-KP（MP）
13100W

MELSERVO
J3
MELSERVO
J4

Σ-V

OMRON
SANYO
ELECTRIC

SC45 SC30 SC23

G55-PhaseStepping
motor
2-PhaseSANYO
ELECTRIC

5-PhaseRecommended coupling

A2

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A1

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A7

XBW-27C2（NABEYA BI-TECH）

A1

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A7

XBW-27C2（NABEYA BI-TECH）

A1

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A7

XBW-27C2（NABEYA BI-TECH）

A1

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A7

XBW-27C2（NABEYA BI-TECH）

A1

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）A3

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）200W

A7

XBW-27C2（NABEYA BI-TECH）

ARM4

□42mm

B1

SFC-010DA2（MIKI PULLEY）
ACD-19A（ISEL）

ARM6

□60mm

A4

SFC-020D2（MIKI PULLEY）
ACD-27A（ISEL）CRK54，RKS54

□42mm

B1

SFC-010DA2（MIKI PULLEY）
ACD-19A（ISEL）CRK56，RKS56

□60mm

A4

SFC-020D2（MIKI PULLEY）
ACD-27A（ISEL）

PKP24

□42mm

B1

SFC-010DA2（MIKI PULLEY）
ACD-19A（ISEL）

PK26

□60mm

A5

SFC-020D2（MIKI PULLEY）
ACD-27A（ISEL）F series□42mm

□42mm

B1

SFC-010DA2（MIKI PULLEY）
ACD-19A（ISEL）F series□60mm

□60mm

A4

SFC-020DA2（MIKI PULLEY）
ACD-27A（ISEL）

HF-KP（MP）
23200W

HG-KR（MR）053

50W

HG-KR（MR）13100W

HG-KR（MR）23200W

SGMJV，SGMAV-A550W

SGMJV，SGMAV-01

100W

SGMJV，SGMAV-C2150W

SGMJV，SGMAV-02

200W

SGM7J，SGM7A-A550W

SGM7J，SGM7A-01

100W

SGM7J，SGM7A-C2150W

SGM7J，SGM7A-02

200W

R88M-K05030

50W

R88M-K10030

100W

R2AA04005
SANMOTION
R2AA04010
R
R2AA06020
α stepORIENTAL
MOTOR

Model No.

Motor
bracketOutputconfiguration

MINAS
A5

Σ-7

SensorTechnical Data

SeriesYASKAWA
ELECTRICSC

SE45 SE30 SE23 SE15

SE

SG55 SG46 SG33 SG26 SG20

SE30

50W
100W

・For motors other than above-mentioned, consult KURODA.
・When selecting a rigid type of coupling for connecting a motor, consult KURODA.
・For detailed specifications of above-mentioned motors and couplings, refer to catalogs or websites provided by the makers.

80

● PARALLEL MOTOR MOUNTING

SG SG20 SG26 SG33 SG46 SG55

SE30
A-A sectional view
21

3

Pulley-cover ﬁxing bolt

Motor position No.
"3"

Tension plate

Motor position No.
"6"

72

117

24

A

21

60

16

42

3

Motor position No.
"0"

9

SE

A
0.3

16
<Tension of belt>
Td

28

d

Motor position No.
"9"・Td=1.9N
・d=1.1mm
・Belt tension=29N・Pulley unit position can be adjusted at every 90 degree.
・Motor parallel mounting can be equipped with dust-

E□
F□

Inner dia. φ8
Inner dia. φ8Applicable motor
Panasonic

50 - 100W motor and so on

Yaskawa

50 - 100W motor and so on

Mitsubishi Electric 50 - 100W motor and so on
Sanyo Electric

50 - 100W motor and so on

for modifying positions of the pulley-cover fixing bolts (3 Fullfill the motor position No. in □.
Check the spec. if the motor can be assembled before using.
M3 hex socket bolts).
・Tension plate position can be built in pulley cover.
・Although tension plate is attached inside the cover with standard specifications, it can also be attached to outside the cover. Consult
KURODA for such modification.
・The mass is 0.2kg larger than the values shown in table on page 75.
・Inertia moment is 2.22×10−6kg・ｍ2 larger than the value shown in table on page 55.

Parallel motor mounting type F□
Tension plate dimension

4-M3

4-M4

PCD45

PCD46

90°

SensorParallel motor mounting type E□
Tension plate dimension

SC SC23 SC30 SC45

proof cover and sensor.
・Fill Motor position No. in □.
If the pulley cover may not be removable due to restrictions arising from direction of the unit, consult KURODA

Mark Pulley Inner dia.

SE15 SE23 SE30 SE45

42.3

90°

Technical Data81

● SENSOR
Symbol C (NPN) / P (PNP), M / Y (PNP): Photo-microsensor (OMRON, Panasonic Industrial Devices SUNX)
Without dustproof cover

18.3

15.5

Photo-microsensor

15.5

Motor side

Sensormounting plate

15 5

Sensor rail

Motor side
Sensormounting plate

24

20

SE

15 5

Sensor rail

20

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)
Without dustproof coverWith dustproof coverSensor dog

Proximity sensor

15

8
12.5

8

Sensor dog

12.5

65

SC

Motor side

Sensor rail

Proximity sensor

24

Motor side

13.1

● SENSOR RAIL
Sensor rails only available with no sensors.
Sensor rail No. 1

82

3

5

12.5

SensorTechnical Data

Sensor rail No. 1

5

3.5

3

1

7

SE45 SE30 SE23 SE15

Sensor dog

Sensor dog
Photo-microsensor

15

SC45 SC30 SC23

With dustproof cover

18.3

SG
SG55 SG46 SG33 SG26 SG20

SE30

65

Sensor rail
13.1

● DOWEL PIN HOLE
Dowel pin holes are applicable on the slide blocks with part number "PS", sub-tables "PR"or slide blocks and sub-tables"PSR". For actuators with 2 blocks, they are on both driving-side block and driven-side block. Please note that dowel pins are
not equipped.

Long block with dustproof cover with "PS"70 ±0.05

Long block without dustproof cover with "PS"2-φ3＋0.014
depth 502-φ3＋0.014
depth 50

SG SG20 SG26 SG33 SG46 SG55

SE30

SE15 SE23 SE30 SE4522±0.05

SE

19 ±0.05
Motor side

Motor side

Guide rail with "PR"Guide rail length

φ5 H9 through7

Guide rail length

N

M

150

25

100
100

300

200

500

50

600

400

Less than 8

500

700
750

300

(Unit: mm)
Dowel pin height

Sensor200
400

N

SC SC23 SC30 SC45

5 H9 through

M

600
25

700

Technical Data

Notice: In case dowel pin is stuck out from the U-guide rail, it may interfere with and break the slide block.

83

115
10
60
＋0.0182-φ4 0depth 6

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)4-M6 depth 83672Overall length L2

81

77

Maximum stroke(61.5)(63.5)

43

7.5

71

SE45 SE30 SE23 SE15

Guide rail length L1

14

88.2

P2

86.5

M2×P2

N2
2×(M2＋1)-M3 depth 8 (both sides)

2×(M1＋1)-M6 tap hole

SC

M1×P1

N1

Slide block11

Guide rail

0.5

SC45 SC30 SC23

P1

46

SG

● FULL-COVER TYPE LONG BLOCK CONFIGURATIONSSE

SG55 SG46 SG33 SG26 SG20SC45Technical Data

SensorLength of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)116

● FULL-COVER TYPE LONG BLOCK DIMENSIONS
Guide rail length Overall length
L1

L2

540

631

640

731

740

831

Maximum stroke
N1

M1×P1

N2

M2×P2

4×100
5×100
70

6×100

20

(Unit: mm)

Long block

Long block (with LUBSEAL)

A: 1 block

E: 1 block

2×250

415

407

2×300

515

507

2×350

615

607

840

931

7×100

2×400

715

707

940

1031

8×100

3×300

815

807

● PERMISSIBLE SPEED / MASS
Permissible speed (mm/s)
Lead
10mm

Full-cover type
20mm

A: With 1 long block

540

9.2

640

10.5

740

260

520

1040

840
940

Mass of table(slide block + table + table cover parts)

11.8

1.27

13.0
200

410

830

14.3

(Note 1) Mass of full-cover type actuators in the above table includes mass of table.
(Note 2) For long rail configurations, please consult KURODA.

Please refer to Pages 92 to 95 of SE45 series regarding to motor bracket configurations and parallel motor mounting.

● DOWEL PIN HOLE (Guide rail only)
Please refer to Pages 97 of SE45 series regarding to guide rail positioning hole.

SC SC23 SC30 SC45

● MOTOR BRACKET CONFIGURATIONS

SE15 SE23 SE30 SE455mm

Mass (kg)SE

Guide rail length
L1(mm)

SG SG20 SG26 SG33 SG46 SG55

SC45

SensorTechnical Data117

● FULL-COVER TYPE SUB GUIDE RAIL CONFIGURATIONS
115
10

M3 grease ﬁller hole (standard spec. (Symbol: N) is with a hole plug)(Less than 1 mm protrusion from table cover.)60

SG
SG55 SG46 SG33 SG26 SG20SC45

＋0.0182-φ4 0depth 6
36

4-M6 depth 872Guide rail length L1

14

88.2
81

14

Maximum stroke(61.5)

71

7.9(61.5)

7.5

43
P2

86.5

N2

M 2×P22×(M2＋1)-M3 depth 6 (both sides)

2×(M1＋1)-M6 tap hole

N1

M1×P1

SC45 SC30 SC23

P1

Slide block

31.5

11

0.5

Guide rail

46

SC

SE45 SE30 SE23 SE15SE

Overall length L2

Technical Data

SensorLength of ﬁxing bolts should be determined to the length that satisﬁes above-mentioned conditions.
(Fixing bolts longer than thickness of bottom surface of guide may interfere with function of slide block.)118

● FULL-COVER TYPE SUB GUIDE RAIL DIMENSIONS
Guide rail length Overall length
L1

L2

540

631

640

731

740

831

Maximum stroke
N1

M1×P1

N2

4×100
5×100
70

6×100

20

M2×P2

(Unit: mm)

Long block

Long block (with LUBSEAL)

A: 1 block

E: 1 block

2×250

417

409

2×300

517

509

2×350

617

609

840

931

7×100

2×400

717

709

940

1031

8×100

3×300

817

809

● PERMISSIBLE SPEED / MASS
Mass (kg)Full-cover typeLead

A: With 1 long block
8.5

640

9.7
2000

Mass of table(slide block + table + table cover parts)

10.8

840

12.0

940

13.1

SE15 SE23 SE30 SE45

Permissible speed(mm/s)

540
740

SE

Guide rail length
L1(mm)

SG SG20 SG26 SG33 SG46 SG55

SC45

1.27

(Note 1) Mass of full-cover type actuators in the above table includes mass of table.
(Note 2) For long rail configurations, please consult KURODA.

SC SC23 SC30 SC45
SensorTechnical Data
119

SG
SG55 SG46 SG33 SG26 SG20SC45
● COVER CONFIGURATIONThe below-mentioned configurations with grease nipple and/or wiper are available for full-covered series. Standard specification (Symbol: N) has a plug equipped with grease filler hole.

Full-cover type with grease nipple (Symbol: G)←Motor bracket side

SE45 SE30 SE23 SE15SE

5Grease nipple

Full-cover type with wiper (Symbol: S)←Motor bracket side

SC45 SC30 SC23

SC

Wiper (mounted inside table cover)Full-cover type with grease nipple and wiper (Symbol: D)

Technical Data

Wiper (mounted inside table cover)120

Grease nipple
5

Sensor←Motor bracket side

● SENSOR
Symbol C (NPN) / P (PNP), M (NPN) / Y (PNP): Photo-microsensor (OMRON, Panasonic Industrial Devices SUNX)
Sensor dog

34

15.5

15

Sensor rail

5

14.8

Motor side

Photo-microsensor

SE

Sensor mounting plate

SE15 SE23 SE30 SE45

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)
15

8

14.5

Sensor dog

SC SC23 SC30 SC45

Motor side

56

Sensor rail

Proximity sensor

13.3● SENSOR RAIL
Sensor rails only available with no sensors.
Sensor rail No. 1

Sensor

1

3
5
7

3.5

14.5

3

SG SG20 SG26 SG33 SG46 SG55

SC45

5

Technical Data

Sensor rail No. 1

121

85
7

8-M4 depth 8
φ10 h7
3.5

19.5

62.5

31.5

＋0.05

90°

φ50 0

18

4-4.8 drilled hole

8

51

120°

PC
D

77

60

Motor bracket configuration: A0

φ46

SG

● MOTOR BRACKET CONFIGURATIONS

74

SE

SG55 SG46 SG33 SG26 SG20

SE45

51
0

40
4-M5 depth 10

SC

40

18

φ40 −0.039

85
3

φ10 h720

57.5

SE45 SE30 SE23 SE15

Motor bracket configuration: RN

Technical Data

Sensor

SC45 SC30 SC23

Mass of the RN configuration is 0.26 kg less than the values shown in the tables on pages 85 and 87.

92

SG SG20 SG26 SG33 SG46 SG55

SE45
● MOTOR BRACKET CONFIGURATIONS (INTERMEDIATE FLANGE)

90°

D4
6

4-M4 depth 8

PC

+0.05

φ30+0.02

8

□62

+0.05

φ50+0.02

φ46

90°

□62

4-M5 depth 10

10Motor bracket configuration: A4 (mass: 73g)
PC
D7
0

Motor bracket configuration: A1 (mass: 53g)

4

D4
5

90°

□62

4-M3 depth 6

PC

+0.05

φ30+0.02

D7
0
PC

8

□62

φ50

+0.05
+0.02

φ46

90°

SE15 SE23 SE30 SE45

4-M4 depth 10

10Motor bracket configuration: A5 (mass: 73g)

SE

Motor bracket configuration: A2 (mass: 53g)

4

+0.05

4-M4 depth 8

50

50

8

φ36+0.02

PC

90°

□62

□80

+0.05

φ70+0.02

φ46

4-M5 depth 10

SC SC23 SC30 SC45

10Motor bracket configuration: A6 (mass: 64g)
D90Motor bracket configuration: A3 (mass: 103g)

4

SensorTechnical Data
93

SG

● MOTOR BRACKET CONFIGURATIONS AND MOTOR OPTION
Motor option
Motor type

Maker

MINAS
A5
PANASONICMUMA02
MUMA04
MSME5AMSME01
MSME02
MSME04

MSMF5AMSMF01
MSMF02
MSMF04
MSMF08MELSERVO
J3
MITSUBISHI
ELECTRICMELSERVO
J4
AC SERVO
motor

Σ-V

SC45 SC30 SC23SCSE45 SE30 SE23 SE15

Model No.

MSME08MINAS
A6

HF-KP（MP）053
HF-KP（MP）
13
HF-KP（MP）
23
HF-KP（MP）
43
HG-KR（MR）053
HG-KR（MR）13
HG-KR（MR）23
HG-KR（MR）43
SGMJV，SGMAV-A5
SGMJV，SGMAV-01
SGMJV，SGMAV-C2
SGMJV，SGMAV-02
SGMJV，SGMAV-04
SGMJV，SGMAV-06

YASKAWA
ELECTRIC

Σ-7

SGM7J，SGM7A-A5
SGM7J，SGM7A-01
SGM7J，SGM7A-C2
SGM7J，SGM7A-02
SGM7J，SGM7A-04
SGM7J，SGM7A-06

OMRON

SensorTechnical Data

Series
MINAS
E

SE

SG55 SG46 SG33 SG26 SG20

SE45

SANYO
ELECTRIC

R88M-K05030
R88M-K10030
G5
R88M-K20030
R88M-K40030
R2AA04005
SANMOTION R2AA04010
R
R2AA06020
R2AA06040

Motor
Recommended couplingbracketOutput configuration
200W
SFC-030DA2（MIKI PULLEY）
A2
ACD-34A（ISEL）
400W
50W
SFC-020DA2（MIKI PULLEY）
A5
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A2
ACD-34A（ISEL）
400W
SFC-040DA2（MIKI PULLEY）
750W
A3
ACD-44A（ISEL）
50W
SFC-020DA2（MIKI PULLEY）
A5
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A2
ACD-34A（ISEL）
400W
SFC-040DA2（MIKI PULLEY）
750W
A3
ACD-44A（ISEL）
50W
SFC-020DA2（MIKI PULLEY）
A4
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A1
ACD-34A（ISEL）
400W
50W
SFC-020DA2（MIKI PULLEY）
A4
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A1
ACD-34A（ISEL）
400W
50W
SFC-020DA2（MIKI PULLEY）
100W
A4
ACD-27A（ISEL）
150W
200W
SFC-030DA2（MIKI PULLEY）
ACD-34A（ISEL）
400W
A1
SFC-035DA2（MIKI PULLEY）
600,
550W
ACD-39A（ISEL）
50W
SFC-020DA2（MIKI PULLEY）
100W
A4
ACD-27A（ISEL）
150W
200W
SFC-030DA2（MIKI PULLEY）
ACD-34A（ISEL）
400W
A1
SFC-035DA2（MIKI PULLEY）
600W
ACD-39A（ISEL）
50W
SFC-020DA2（MIKI PULLEY）
A4
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A2
ACD-34A（ISEL）
400W
50W
SFC-020DA2（MIKI PULLEY）
A4
ACD-27A（ISEL）
100W
200W
SFC-030DA2（MIKI PULLEY）
A1
ACD-34A（ISEL）
400W

ORIENTAL
α step
ARM6
□60mm
A6
MOTOR
SFC-020DA2（MIKI PULLEY）
Stepping
ACD-27A（ISEL）
motor
SANYO
5-PhaseF series□60mm□60mm
A6
ELECTRIC
・ For motors other than above-mentioned, consult KURODA.
・ When selecting a rigid type of coupling for connecting a motor, consult KURODA.
・ For detailed specifications of above-mentioned motors and couplings, refer to catalogs or websites provided by the makers.
94

SG SG20 SG26 SG33 SG46 SG55

SE45
● PARALLEL MOTOR MOUNTING
Pulley-cover ﬁxing bolt

Motor position No.
"3"

31

86.5

102

167

34

3

A

3

SE

A

d

20

34

62

0.5

Motor position No.
"6"

62.5

Td=2.9N
d=1.6mm
Belt tension=44N

Td

Motor position No.
"9"

Tension of belt

A-A sectional view

90°

4-M5
PCD70

90°

Parallel motor mounting type G□
Tension plate dimension
4-M4

50

Technical Data

50

4-M4

PCD70

Parallel motor mounting type F□
Tension plate dimension

SensorParallel motor mounting type E□
Tension plate dimension

SC SC23 SC30 SC45

・Pulley unit position can be adjusted at every 90 degree.
Mark Pulley Inner dia.
Applicable motor
・Fill motor position No. in □.
E□ Inner dia. φ11 Panasonic
200W motor and so on
If the pulley cover may not be removable due to restrictions
Yaskawa
200W motor and so on
arising from direction of the unit, consult KURODA for modF□ Inner dia. φ14 Mitsubishi Electric 200W motor and so on
ifying positions of the pulley-cover fixing bolts (3 M3 crossrecessed flat head machine screws).
Sanyo Electric
200W motor and so on・Motor parallel mounting can be equipped with dustproof
Oriental Motor
G□
Inner dia. φ8
cover and sensor.
Stepping Motor □60 series and so on"・Although tension plate is attached inside the cover with
Fullfill the motor position No. in □.
standard specifications, it can also be attached to outside
Check the spec. if the motor can be assembled before using.
the cover. Consult KURODA for such modification.
・Tension plate position can be built in pulley cover.
・The mass is 0.7kg larger than the values shown in tables on pages 85 and 87.
・Inertia moment is 1.24×10−5kg・ｍ2 larger than the value shown in table on page 55.

SE15 SE23 SE30 SE45

Motor position No.
"0"

12

95

● SENSOR
Symbol C (NPN) / P (PNP), M (NPN) / Y (PNP): Photo-microsensor (OMRON, Panasonic Industrial Devices SUNX)
Without dustproof coverWith dustproof cover

15.5

Sensor dog

34

15.5

Photo-microsensor
Sensor dog

34

SG
SG55 SG46 SG33 SG26 SG20

SE45

14.8

10
Motor side

5

Sensor rail

14.8

10

Motor side
Photo-microsensor

5

Sensor rail

Sensor mounting plate

Symbol K (NPN) / E (PNP): Proximity sensor (Azbil)
Without dustproof coverWith dustproof cover

10

14.5

65

Sensor rail

10

13.1

Motor side

● SENSOR RAIL
Sensor rails only available with no sensors.
Sensor rail No. 1
3

Technical Data

Sensor rail No. 1

96

3

5

7

14.5

Sensor15

3.5

SC45 SC30 SC23

SC

Motor side

Proximity
sensor8

Sensor dog

8

Sensor dog

14.5

SE45 SE30 SE23 SE15

SE

Sensor mounting plate

Proximity
sensor65

Sensor rail
13.1

● DOWEL PIN HOLE
Dowel pin holes are applicable on the slide blocks with part number "PS", sub-tables "PR"or slide blocks and sub-tables"PSR". For an actuator with 2 blocks, they are on both driving-side block and driven-side block. Please note that dowel pins
are not equipped.

Long block without dustproof cover with "PS"Long block with dustproof cover with "PS"For actuators with 2 blocks, the holes are on both blocks.

Motor side

Motor side

Short block without dustproof cover with "PS"

Short block with dustproof cover with "PS"For actuators with 2 blocks, the holes are on both blocks.
depth 62-φ4＋0.018
02-φ4＋0.018
depth 60121242±0.03

100 ±0.03

SC SC23 SC30 SC45

Motor side

Motor side

Guide rail with "PR"Guide rail length

5 H9 throughφ5 H9 through

N

70

700
800

Technical Data

7

N

(Unit: mm)
Dowel
M
pin
height200
300
400 Less
500 than11
600

Sensor

M

Guide
rail
length
340
440
540
640
740
840
940

SE15 SE23 SE30 SE4542±0.03SE

100 ±0.03

14

2-φ4＋0.018
depth 602-φ4＋0.018
depth 60

SG SG20 SG26 SG33 SG46 SG55

SE45

Notice: In case dowel pin is stuck out from the U-guide rail, it may interfere with and break the slide block.

97

SG

● Specifications
NPN output typePNP output type
Sensing range
Minimum sensing object
Hysteresis
Repeatability
Supply voltage
Current consumption

PM-L25-Model No.

SE

OutputOutput operation
Short-circuit protection

SE45 SE30 SE23 SE15

SG55 SG46 SG33 SG26 SG20

PHOTO-MICROSENSOR/Panasonic Industrial Devices SUNX

Operation indicator
Pollution degree
Protection
Ambient temperature
Ambient humidity
Environmental Ambient illuminanceresistance
Voltage withstandability
Insulation resistanceVibration resistance
Shock resistance
Emitting element
Material
Cable

Response time

Cable extension

SC45 SC30 SC23

SC

Mass

Specifications
S
PM-L25 (NPN) : 3
:3
:1
:1
-

Sensor Model No.
Sensor mounting plate (Note 1)
Sensor rail
Sensor dog (Note 2)
Connector for sensor

M
PM-Y65 (NPN) : 3:3:1:1
CN-14A : 3

Y
PM-Y65P (PNP) : 3:3:1:1
CN-14A : 3(Note 1) Sensor mounting plate is applied to SE and SC series.
(Note 2) 2 sensor dogs are used for SG33□ D-150 sensor with Symbol "M" or "Y".

● I/O circuit diagram● Wiring diagram

NPN output type

NPN output type

Color code of cable type and connector attached cable

Brown(Brown)+V(Black) Output 1

Main circuit

Sensor6mm (fixed)
0.8X1.2mm opaque object
0.05mm or less
0.01mm or less
5 to 24V DC ±10% Ripple P-P 10% or less
15mA or less
NPN output type: NPN transistor open collector
NPN output type: NPN transistor open collector
Maximum sink current : 50mA
Maximum sink current : 50mA
Applied voltage : 30V DC or less
Applied voltage : 30V DC or less(between output and 0V)(between output and 0V)
Residual voltage : 2V or less (at 50mA sink current) Residual voltage : 2V or less (at 50mA sink current)
1V or less (at 16mA sink current)
1V or less (at 16mA sink current)
PNP output type: PNP transistor open collector
Maximum sink current : 50mA
Applied voltage : 30V DC or less(between output and +V)
Residual voltage : 2V or less (at 50mA sink current)
1V or less (at 16mA sink current)
Incorporated with 2 outputs : Light-ON/Dark-ON
Incorporated
Under light received condition : 20µs or less
Under light shielded condition : 80µs or less (Maximum response frequency 3kHz)
Orange LED (lights up under light received condition)
3
IP64 (IEC)
IP40 (IEC)-25 to +55℃ : (No dew condensation or icing allowed), Storage: -30 to +80℃ :5 to 85% RH, Storage: 5 to 95% RH
Fluorescent light : 1000lx or less at the light-receiving face
1000V AC for 1 min. between all supply terminals connected together and enclosure
20MΩ or more with 250V DC megger between all supply terminals connected together and enclosure
10 to 2000Hz frequency, 1.5mm amplitude (maximum acceleration 196m/s2) in X, Y and Z directions for 2 hours each
15000m/s2 acceleration (1500G approx.) in X, Y and Z directions for 3 times each
Infrared LED (Peak emission wavelength: 855nm (0.034mil), non-modulated)
Case: PBT Display: Polycarbonate
0.09mm2 4-core cabtyre cable, 1m long
Extension up to total 100m (328.084ft) is possible Extension up to total 100m (328.084ft) is possible
22
with 0.3mm , or more, cable.
with 0.3mm , or more, cable.
Main body : 10g approx.
Main body : 3g approx.

Accessories

ZD1

ZD2
Tr2

Resistance

50mA MAX.

Tr1

Resistance ＋(White) Output 2
D(Blue) 0V

−

Black

5〜24V DC
±10%

ResistanceResistance

50mA MAX.

＋
−

White

5〜24V DC
±10%BlueInternal circuit

Users' circuit

PNP output typeD
Tr1

Main circuit

Technical Data

PM-Y65
PM-Y65P

Tr2

ZD1

ZD2

Color code of cable type and connector attached cable

PNP output type
Brown

(Brown)+V
50mA MAX.

(Black) Output 1

50mA MAX.

＋

Resistance −(White) Output 2
Resistance(Blue) 0V

5〜24V DC
±10%

Black
White
Blue

Internal circuit

Users' circuit＋

Resistance−

5〜24V DC
±10%

Resistance(Note) For detailed information and operating precautions, refer to catalogs and operating instructions supplied by the sensor maker.

122

● Specifications
NPN output typePNP output type
Sensing method
Rated supply voltage
Rated sensing distance
Usable sensing distanceSensing object
Hysteresis
Operating voltage range
Current consumption

Sensor Model No.
Sensor rail
Sensor dog

E
APM-D3E1 (PNP) : 2
APM-D3E1F (PNP) : 1:1:1

NPN output typePNP output type
Brown
Resistance
Output Black30mA or lessBlue

DC10.8〜26.4V

Main circuit

Brown

30mA or lessDC10.8〜26.4V

Output Black
Resistance
Blue

123

Technical Data

Main circuit

Sensor● Wiring diagram

SC SC23 SC30 SC45

SpecificationsK
APM-D3B1 (NPN) : 2
APM-D3B1F (NPN) : 1:1:1

SE15 SE23 SE30 SE45

AccessoriesSE

APM-D3B1, APM-D3B1F (different-frequency type)
APM-D3E1, APM-D3E1F (different-frequency type)High-frequency oscillation type (unshielded type)DC 12/24V
2.5mm ±15%0〜1.8mm15×15mm t=1mm Iron
15% or less in sensing length
DC 10.8〜26.4V(Ripple 10% or less)
10mA or less
NPN transistor open collector
Output type
PNP transistor open collector
Operation mode
Normally closed (N.C.)
Switching current
30mA or less (resistance load)
Control Output
Residual voltage
1V or less (switching current 30mA
Output dielectric strength
26.4V
Response frequency
120Hz
Repeatability
0.05mm or lessTemperature characteristics±15% max. for the range of -10 to +55℃ when +25℃ is taken as standard temperature in sensing distance
Supply voltage characteristics±2% max. with 10% voltage fluctuation with rated supply voltage as standard voltage in sensing distanceOperation indicator
Lights up in orange under light received condition
Ambient temperature−10〜＋55℃
Ambient temperature at storage−25〜＋70℃
Ambient humidity
35〜85%RH
Insulation resistance
50MΩ or more (measured by DC 500V insulation ohmmeter)
Voltage withstandability
1000V AC , 50/60Hz for 1 min. between all supply terminals connected together and enclosure
Vibration resistance
10 to 55Hz, 1.5mm amplitude in X, Y, and Z directions for 2 hours each
Shock resistance
500m/s2 in X, Y, and Z directions for 3 times eachProtection
IP67 (IEC529)
Mass
10g approx.
Circuit protection
Surge absorption, reverse connection protection circuit (-S: load short protection)
Connection
Pre-leaded (oil-resistant cord: 2.5 mm O.D., 0.08 mm2, 3-core, 1 m)
Case material
Polyarylate resin
Tightening torque
0.5N･m (M2.6 screw)
Model No.

SG SG20 SG26 SG33 SG46 SG55

PROXIMITY SENSOR/Azbil

SG● Specifications
NPN output typePNP output type
Sensing range
Sensing object
Hysteresis
Light source (peak emission wavelength)
Operation indicator
Supply voltage
Current consumption

EE-SX674
EE-SX674P

Model No.

SE45 SE30 SE23 SE15

Response frequency
Ambient illuminanceAmbient temperature
Ambient humidity
Vibration resistance
Shock resistanceProtection
Connection
Mass
Case
Material
Cover
Terminal

Polycarbonate

Sensor

SC45 SC30 SC23

SC

Accessories

Technical Data

EE-SX671
EE-SX671P

5mm (slot width)
Opaque object 2 x 0.8mm or more
0.025mm or less
GaAs IRED (940 nm)
Lights up at light-received (Red LED)
5 to 24V DC±10% Ripple P-P 10% or less
12mA and less (connector type, when to open L connector)
NPN output type: NPN transistor open collector
Output : 5 to 24V DC 100mA or less
Residual voltage : 0.8V or less (at 100mA load current),
0.4V or less (at 40mA load current)
OFF-state current 0.5mA or less
PNP output type : PNP transistor open collector
Output : 5 to 24V DC 50mA or less
Residual voltage : 1.3V or less (at 50mA load current)
OFF-state current 0.5mA or less
1kHz or above (3kHz in average)
Fluorescent light : 1000 lx at the light-receiving face
Operation: -25 to +55℃, Storage: -30 to +80℃ (no dew condensation or icing allowed)
Operation: 5 to 85% RH, Storage: 5 to 95% RH (no dew condensation or icing allowed)
20 to 2000Hz (100m/s2 peaked acceleration), 1.5mm amplitude in X, Y and Z directions for 2 hours
each (4min. cycle)
500m/s2 in X, Y and Z directions for 3 times each
IP50 IEC60529
Connector (available for direct soldering)
3g approx.
Poly Butylene Terephtalate (PBT)

OutputSE

SG55 SG46 SG33 SG26 SG20

PHOTO-MICROSENSOR/OMRONC
EE-SX674 (NPN) : 3
EE-1001: 3
:1
:1
:3

Sensor Model No.
Connector for sensor
Sensor rail
Sensor dog (Note 3)
Sensor mounting plate (Note 1)

SpecificationsP
H (Note 2)
EE-SX674P (PNP) : 3
EE-SX671 (NPN) : 3
EE-1001: 3
EE-1001: 3
:1
:1
:1
:1
:3

J (Note 2)
EE-SX671P (PNP) : 3
EE-1001: 3:1:1(Note 1) Sensor mounting plate is applied to SE and SC series.
(Note 2) If H or J configuration is used for the model without cover in SG33 series, a sensor mounting plate is attached in addition
to the above-mentioned accessories.
(Note 3) 2 sensor dogs are used for SG33□D-150 sensor with Symbol "M" or "Y".

● I/O circuit diagram
NPN output type
Indicator
lamp
(Red)
Main
circuitPNP output type
Indicator
lamp
(Red)

＋
○
L

ResistanceOUT
IC Output(100mA or less)
−
○

DC
5〜24V

Main
circuit

＋
○
L

OUT
IC
−
○

DC
5〜24V
Resistance(Note) For detailed information and operating precautions, refer to catalogs and operating instructions supplied by the sensor maker.

124

SG SG20 SG26 SG33 SG46 SG55

CONTENTSTECHNICAL DATA FOR BALLSCREW ACTUATORS
Ballscrew actuator selection guide ……………………………………………………………… 126
Expected-life design for guide ……………………………………………………………… 127-129
Expected-life design for ball screw and fixed side bearing …………………………………… 130
Example of selection ① For horizontal use …………………………………………………… 131
Example of selection ② For vertical use ……………………………………………………… 132
Ballscrew actuator specification data sheet …………………………………………………… 133

SE
SE15 SE23 SE30 SE45SC SC23 SC30 SC45
SensorTechnical Data
125

SG

Similar to ball screw selections, there is no instant way of selecting appropriate ballscrew actuators forvarious purposes. The following is an example of general procedures in actuator selection, with someconsiderations to be made on each step and pages to refer to.
Selection
procedures

Considerations●Mass of work/table ●Maximum feed speed ●Velocity diagram
Conditions of use●External load ●Maximum stroke●Mounting conditions (horizontal, vertical, wall mounting) ●Duty cycle●Expected life ●Precision ●Environmental conditions ●Lubrication

SC

SE45 SE30 SE23 SE15

SE

SG55 SG46 SG33 SG26 SG20BALLSCREW ACTUATOR SELECTION GUIDE

Tentative selection of actuator●Maximum stroke ●Permissible speed ●Precision

Calculation of life forvarious elements●Comparison between expected life and calculated life

SC45 SC30 SC23

Lubrication, dust prevention,and other factors

Technical Data

SensorDecision in Model No.

126●Grease to be used ●With or without cover ●Motor bracket dimensions●Sensor ●Surface treatment ●Dowel pin hole●Conﬁrmation of Model No.

The shortest life expectancy of among guid-rail, ballscrew
and support bearing can be defined as the life expectancy

Table 1 Contact factor (fC)
Number of blocks to be
used in contact, whensingle axis module is used.

of ballscrew actuators, SE, SG, and SC series.
The following formula is used to calculate the life expectancy.

Contact factor
(fc)

1

1.0

2

0.81

LIFE EXPECTANCY OF GUIDETable 2 Load factor (fW)

Calculate the life expectancy of guide using the following

Vibration and shock

Speed

Load factor
(fW)

Zero

250mm/s or less1.0〜1.5

formula:
LG ＝

3

fC C
・
・50
f W PT

Formula (1)SG SG20 SG26 SG33 SG46 SG55

LIFE EXPECTANCY

Operating condition

Small

1000mm/s or less1.0〜2.0Large

1000mm/s or more

2.0〜3.5

LG : Life expectancy operational length (km)fC : Contact factor (see Table 1)SE

f W : Load factor (see Table 2)
C : Basic dynamic load rating (N)Calculation of PT

Table 3 Moment equivalent factor
7.84×10−2

SG20**B

3.98×10−2

3.34×10−2

3.92×10−2

SG26**A

1.51×10−1

1.27×10

5.88×10−2

SG26**B

2.72×10−2

2.28×10−2

2.94×10−2

SG33**A

1.26×10−1

1.06×10

4.55×10−2

SG33**B

2.20×10−2

1.84×10−2

2.27×10−2

SG33**C

2.31×10−1

1.94×10

4.55×10−2

SG33**D

3.09×10−2

2.59×10−2

2.27×10−2

SG46**A

8.39×10−2

7.04×10−2

3.17×10−2

SG46**B

1.56×10−2

1.31×10

1.59×10−2

SG46**C

1.39×10−1

1.17×10−1

3.17×10−2

SG46**D

2.15×10−2

1.18×10

1.59×10−2

SG55**A

6.80×10−2

5.71×10−2

2.74×10−2

SG55**B

1.35×10−2

1.14×10

1.37×10−2

value in this formula, therefore it is recommended that you

SE15**A

2.70×10−1

2.45×10−1

9.64×10−2

calculate the life expectancy with an ample margin.

SE15**B

4.50×10−2

3.80×10−2

4.82×10−2

SE23**A

1.52×10−1

1.37×10

5.22×10−2

SE23**B

2.54×10−2

2.29×10−2

2.61×10−2

SE30**A

1.17×10−2

9.83×10

4.54×10−2

SE30**B

1.95×10−2

1.64×10−2

2.27×10−2

SE45**A

8.39×10−2

7.04×10

3.17×10−2

SE45**B

1.56×10−2

1.31×10−2

1.59×10−2

SE45**C

1.26×10−1

1.06×10−1

3.17×10−2

SE45**D

2.10×10−2

1.76×10

1.59×10−2

SC23**A

1.52×10−1

1.37×10−1

5.22×10−2

SC30**A

1.17×10−1

9.83×10−2

4.54×10−2

SC45**A

8.39×107.04×10

3.17×10−2

need to obtain the calculated load per block (PT) in consideration of actual moment load.
If the acceleration is high or short-stroke operation is conducted, calculate PT in consideration of acceleration. This
acceleration calculation is made for a mass loaded on SG,
SE, and SC.
Obtain the calculated load in uniform motion, accelerated
motion, and decelerated motion, and its average figure isused as PT.
For the calculation of P T, select a calculation formulaaccording to the installation conditions.
If acceleration needs not to be considered,
PT = PTC (See Formula (2), (5) and (8)) can be used for calculation. However, you can calculate only the approximate

−1

−1

−1

−2

−2

−2

−1

−1

−2

−2

−2

−2

(Note) The specifications of a model with two blocks show
factors when the two blocks are used in contact.
127

Technical Data

Er(E2r)1.89×10−1

SensorEy(E2p)2.25×10−1

SC SC23 SC30 SC45

Ep(E2p)
SG20**ATo calculate the life expectancy using Formula (1), you

SE15 SE23 SE30 SE45

PT : Calculated load per block (N)SG
SG55 SG46 SG33 SG26 SG20

SE
SE45 SE30 SE23 SE15SCSC45 SC30 SC23

● PT in the case of Horizontal Movement (Horizontal Installation)① For uniform motion (PTC)

SensorX

Y② For accelerated motion (PTa)Z

1
PTa＝ n・W＋Ep (MpL＋m・aa・Z) ＋Ey (MyL＋m・aa・X) ＋Er・MrL─ Formula (3)If item (MpL＋m・α a・Z) or (MyL＋m・α a・X) is a negative value,W(m)the value should be set to 0.

③ For decelerated motion (PTd)1
PTd＝ n ・W＋Ep (MpL＋m・αd・Z) ＋Ey (MyL＋m・αd・X) ＋Er・MrL─ Formula (4)If item (MpL＋m・α d・Z) or (MyL＋m・α d・X) is a negative value,

the value should be set to 0.

If a load is applied from a different direction otherthan W (m) in this figure, contact KURODA.

PTC : Calculated load per block in uniform motion (N)Ep : Moment equivalent factor in pitching direction (see Table 3)

PTa : Calculated load per block in accelerated motion (N)Ey : Moment equivalent factor in yawing direction (see Table 3)

PTd : Calculated load per block in decelerated motion (N)Er : Moment equivalent factor in rolling direction (see Table 3)

n : Number of block of SG / SE / SC

MpL : Load moment in pitching direction (N・mm)

W : Load (N)m : Load mass (kg)αa : Acceleration in accelerated motion (m/sec2)
αd : Acceleration in decelerated motion (m/sec2) (with a minus sign)
X : Distance from center of SG / SE / SC to center of gravity of loaded mass (mm)MpL = W・Y
MyL : Load moment in yawing direction (N・mm)
MyL = 0 (The load moment is zero under this usage.)
MrL : Load moment in rolling direction (N・mm)
MrL = W・X

Y : Distance from center of SG / SE / SC to center of gravity of loaded mass (mm)Z : Distance from center of SG / SE / SC ballscrew to center of gravity of loaded mass (mm)(Note) For the moment directions, see Pages 3, 53 and 101.

● PT in the Case of Horizontal Movement (Wall Installation)① For uniform motion (PTC)

Figure 2

1
PTC＝・W＋Ep・MpL＋Ey・MyL＋Er・MrL─ Formula (5)1.19・n② For accelerated motion (PTa)

PTa＝1
・W＋Ep (MpL＋m・aa・Z) ＋Ey (MyL＋m・aa・X) ＋Er・MrL─ Formula (6)1.19・nIf item (MpL＋m・a a・Z) or (MyL＋m・a a・X) is a negative value,

the value should be set to 0.

Y

Z③ For decelerated motion (PTd)

PTd＝

X

1
・W＋Ep (MpL＋m・ad・Z) ＋Ey (MyL＋m・ad・X) ＋Er・MrL─ Formula (7)1.19・nIf item (MpL＋m・α d・Z) or (MyL＋m・α d・X) is a negative value,

Technical Data

Figure 1

1
PTC＝ n ・W＋Ep・MpL＋Ey・MyL＋Er・MrL─ Formula (2)the value should be set to 0.

W(m)If load is applied from a different direction otherthan W (m), contact KURODA.

PTC : Calculated load per block in uniform motion (N)Ep : Moment equivalent factor in pitching direction (see Table 3)

PTa : Calculated load per block in accelerated motion (N)Ey : Moment equivalent factor in yawing direction (see Table 3)

PTd : Calculated load per block in decelerated motion (N)Er : Moment equivalent factor in rolling direction (see Table 3)

n : Number of block of SG / SE / SC

MpL : Load moment in pitching direction (N・mm)

W : Load (N)m : Load mass (kg)αa : Acceleration in accelerated motion (m/sec2)
αd : Acceleration in decelerated motion (m/sec2) (with a minus sign)
X : Distance from center of SG / SE / SC to center of gravity of loaded mass (mm)MpL = 0 (The load moment is zero under this usage.)
MyL : Load moment in yawing direction (N・mm)
MyL = W・Y
MrL : Load moment in rolling direction (N・mm)
MrL = W・Z

Y : Distance from center of SG / SE /SC to center of gravity of loaded mass (mm)Z : Distance from center of SG / SE / SC ballscrew to center of gravity of loaded mass (mm)128(Note) For the moment directions, see Pages 3, 53 and 101.

① For uniform motion (PTC)

Figure 3

PTC＝Ep・MpL＋Ey・MyL＋Er・MrL─ Formula (8)② For accelerated motion (PTa)

PTa＝Ep (MpL＋m・aa・Z) ＋Ey (MyL＋m・aa・X) ＋Er・MrL─ Formula (9)If item (MpL＋m・α a・Z) or (MyL＋m・α a・X) is a negative value,Xthe value should be set to 0.

③ For decelerated motion (PTd)Y

PTd＝Ep (MpL＋m・ad・Z) ＋Ey (MyL＋m・ad・X) ＋Er・MrL─ Formula (10)

If item (MpL＋m・α d・Z) or (MyL＋m・α d・X) is a negative value,SEthe value should be set to 0.

Z

If load is applied from a different direction otherthan W (m) in this figure, contact KURODA.
PTC : Calculated load per block in uniform motion (N)Ep : Moment equivalent factor in pitching direction (see Table 3)

PTa : Calculated load per block in accelerated motion (N)Ey : Moment equivalent factor in yawing direction (see Table 3)

PTd : Calculated load per block in decelerated motion (N)Er : Moment equivalent factor in rolling direction (see Table 3)

n : Number of block of SG / SE / SC

MpL : Load moment in pitching direction (N・mm)
MpL = W・Z

m : Load mass (kg)

MyL : Load moment in yawing direction (N・mm)
MrL = W・X

αa : Acceleration in accelerated motion (m/sec2)

MrL : Load moment in rolling direction (N・mm)

X : Distance from center of SG / SE / SC to center of gravity of loaded mass (mm)

MyL = 0 (The load moment is zero under this usage.)

Y : Distance from center of SG / SE / SC to center of gravity of loaded mass (mm)Z : Distance from center of SG / SE / SC ballscrew to center of gravity of loaded mass (mm)(Note) For the moment directions, see Pages 3, 53 and 101.

● Using one of the above calculation formulas according to your usage,
calculate average load in each motion to obtain calculated load per block
(PT).

)

PT : Calculated load per block (N)Formula 4

Stroke in accelerated
motion (S1)

Speed (mm/sec)

Stroke in uniform
motion (S2)
Stroke in decelerated
motion (S3)S1 : Traveling distance in accelerated motion (mm) (see Figure 4)

PTa : Calculated load per block in accelerated motion (N) - Formulas (3), (6), (9)PTC : Calculated load per block in uniform motion (N) - Formulas (2), (5), (8)PTd : Calculated load per block in decelerated motion (N) - Formulas (4), (7), (10)
T1

T2

T3

Time (sec)T

129

Technical Datav

S2 : Traveling distance in uniform motion (mm) (see Figure 4)
S3 : Traveling distance in decelerated motion (mm) (see Figure 4)

Sensor(1
3
3
3
PTa ・S1＋PTC ・S2＋PTd ・S 3 ─ Formula (11)
( S1＋S 2＋S3)

SC SC23 SC30 SC45

αd : Acceleration in decelerated motion (m/sec2) (with a minus sign)

PT ＝ 3

SE15 SE23 SE30 SE45

W(m)W : Load (N)SG SG20 SG26 SG33 SG46 SG55

● PT in the Case of Vertical Movement

SG
SG55 SG46 SG33 SG26 SG20

SE
SE45 SE30 SE23 SE15SCSC45 SC30 SC23

SensorTechnical Data

● LIFE EXPECTANCIES OF BALL SCREW AND SUPPORT BEARINGThe life expectancies of the ball screw and the support bearing can be cal-

La : Life expectancy operational length (km)culated using the following common calculation formula shown as below.

fW : Load factor (see Table 2)

Therefore, compare the dynamic load ratings of the ball screw and the sup-Ca : Basic dynamic load rating of ball screw (N)port bearing and substitute a smaller value in the formula for calculation.

Cb : Basic dynamic load rating of support bearing (N)Pa : Ave. Axial load (N)

3

La ＝

1 C a or C b・・ ─ Formula (12)fW
Pa

: Ball screw lead (mm)● Calculation of Pa
To calculate the life expectancy using Formula (6), calculate Pa in consideration of acceleration. Calculate the axial load in uniform, accelerated, and decelerated motions and its average figure is used as Pa.

● In the Case of Horizontal Movement

Pac : Axial load in uniform motion (N)Paa : Axial load in accelerated motion (N)Pad : Axial load in decelerated motion (N)① For uniform motion (Pac)

μ : Friction factor (0.006)

Pac＝m・W＋F＋Fb・n─ Formula (13)

W : Load on block (N)F : External force (load) in axial direction (N)② For accelerated motion (Paa)

Paa＝m・W＋F＋fb・n＋ (m＋mb・n) αa─ Formula (14)fb : Slide resistance per block (N) (see Table 4)n : Number of blocks of SG / SEm : Load mass (kg)③ For decelerated motion (Pad)

Pad＝m・W＋F＋fb・n− (m＋mb・n) αd ─ Formula (15)mb : Block mass of SG / SE (kg)g : Gravitational acceleration (9.8 m / sec2)
αa : Acceleration in accelerated motion (m / sec2)
αd : Acceleration in decelerated motion (m / sec2)● In the Case of Vertical Movement① For uniform motion (Pac)

Pac＝ (m＋mb・n) g＋F＋fb・n─ Formula (16)② For accelerated motion (Paa)

Paa＝ (m＋mb・n)・(g＋α a) ＋F＋fb・na─ Formula (17)③ For decelerated motion (Pad)

Pad＝ (m＋mb・n)・(g−α d) ＋F＋fb・nd ─ Formula (18)

● Using one of the above calculation
formulas according to your usage,
calculate an average axial load (Pa).
Pa ＝ 3

(

)

1
3
3
3
Paa・S1＋Pac ・S2＋Pad ・S 3 ─ Formula (19)
( S1＋S 2＋S3)

Table 4 Slide resistance per block (fb) (seal resistance)(Unit: N)
Model No.

P

SG20

2.3

4.9

SG26

5.4

9.8

SG33

4.4

10.2

SG46

7.4

13.3

SG55

9

16

(Unit: N)

Pa : Average axial load (N)S1 : Traveling distance in accelerated motion (mm) (see Figure 4)
S2 : Traveling distance in uniform motion (mm) (see Figure 4)
S3 : Traveling distance in decelerated motion (mm) (see Figure 4)
Paa : Axial load in accelerated motion (N) - Formulas (14), (17)Pac : Axial load in uniform motion (N) - Formulas (13), (16)
Pad : Axial load in decelerated motion (N) - Formulas (15), (18)130

Accuracy gradeH

Model No.

Accuracy grade
H/U/W

SE15

2.0

SE23, SC23

2.5

SE30, SC30

2.5

SE45, SC45

7.5

SG SG20 SG26 SG33 SG46 SG55

EXAMPLE OF BALLSCREW ACTUATOR SELECTION● Linear motion robot - X-axis<Specifications>
10kg

Load distribution

See right side diagram.

Maximum stroke: st

550mm

Fast-feed speed: v

500mm/s

Acceleration/deceleration time constant: t

0.2ｓ

Maximum motor speed

6000min−1

Orientating orientation

Horizontal

Repeated positioning accuracy±0.01 mm or less

Expected life

30,000h

Load distribution diagram
X＝100

Z＝100

Mass of work and table: M

10kg

SE
SE15 SE23 SE30 SE45

Duty cycle model diagramv (mm/s)
500

0

1.3
0.2

st: 500.9

0.2

st: 450

st: 50t(s)st: 550② Calculation of life expectancy②-1. Calculating life expectancy of guide
Considering the usage with moment being loaded, average load and life expectancy were calculated in accordance with "LIFEEXPECTANCY OF GUIDE" on page 127, and they resulted in 1,274 N and 39,030 hours, respectively. The load coefficient for
the above calculation was determined to be 2, based on the conditions of use.
②-2. Calculating expected life of ball screw and support bearings

SC SC23 SC30 SC45

① Tentatively select SE4510A-740W-A1NN-NN in SE series, based on the conditions such as stroke and speed.

Average axial load and life expectancy were calculated in accordance with "LIFE EXPECTANCIES OF BALL SCREW ANDSUPPORT BEARING" on page 130, and the axial load resulted in 14.9 N and expected life of both ball screw and supportof use.
③ Results of the selection

Sensorbearing in over a million hours. The load coefficient for the above calculation was determined to be 2, based on the conditions

The above calculation results of life expectancies confirmed that the tentatively selected model would satisfy the required specifications. Since there is no other particular specification to be further considered, the model is selected officially.

If longer life expectancy than the calculated life is preferred, make re-calculation after changing specifications, such as upgrading
model size or adding extra slide block.

131

Technical Data

Selected model of ballscrew actuator: SE4510A-740W-A1NN-NN

SG● Lift - Z-axis

Load distribution diagram<Specifications>
Mass of work and table: M

6kg

Load distribution

See right side diagram.

Maximum stroke: st

350mm

Fast-feed speed: v

500mm/s

Acceleration/deceleration time constant: t

0.2ｓ

Z＝50

Maximum motor speed

6000minOrientating orientation

Vertical

Repeated positioning accuracy±0.003 mm or lessLife expectancy

40,000h−1Center of load
6kg

SE45 SE30 SE23 SE15

SE

SG55 SG46 SG33 SG26 SG20

EXAMPLE OF BALLSCREW ACTUATOR SELECTION

Duty cycle model diagramv (mm/s)
500

0

0.9
0.2

0.5

0.2

st: 50

st: 250

st: 50t(s)st: 350① Tentative selection of ballscrew actuator

SC45 SC30 SC23

SC

Tentatively select SG3310A-500H-A0NN-NN in SG series, based on the conditions such as strokes and speed.
② Calculation of life expectancy②-1. Calculating life expectancy of guide
Considering the usage with moment being loaded, average load and life expectancy were calculated in accordance with "LIFEEXPECTANCY OF GUIDE" on page 127, and they resulted in 805 N and 17,166 hours, respectively. The load coefficient for
the above calculation was determined to be 2, based on the conditions of use.
②-2. Calculating expected life of ball screw and support bearing
Average axial load and life expectancy were calculated in accordance with "LIFE EXPECTANCIES OF BALL SCREW ANDSUPPORT BEARING "on page 130, and the axial load resulted in 60N and expected life of ball screw and support bearing in
44,202 and 353,620 house, respectively. The load coefficient for the above calculation was determined to be 2, based on the

Sensorconditions of use.
③ Results of the selection
According to the above results of life expectancies, the life of the guide does not satisfy the life expectancy requirement. Since
the ball screw and support bearing have satisfactory life expectancies, make re-calculation after changing the block on theTechnical Data

guide. Leaving the guide rail length and required stroke as they are, change the model to SG3310D-500H-A0NN-NN.
④ Re-calculation of life
As in the previous step, average load and life expectancy were calculated in accordance with "LIFE EXPECTANCY OF GUIDE"on page 127, and they resulted in 198 N (load per block) and 146,740 hours, respectively.
⑤ Results of the re-selection
The results of re-calculation of life expectancy of the guide confirmed that the selected model would satisfy required hours of life expectancy.

132

Company Name

Date

Department

Contact personnel

AdressTel / Fax

SG SG20 SG26 SG33 SG46 SG55BALLSCREW ACTUATOR SPECIFICATION DATA SHEET

Location of use

Name of Equipment/machine used
Drawing/conceptual drawing attached?

Yes

pieces of pages

No

Conditions of Use (Either unit system may be used.)
Mass of work and table (kg)Operating orientation

Horizontal

VerticalMaximum table speed (mm/s)

Wall installation

Maximum table stroke (mm)Expected life (h)Operating conditions
Max.Speed

Hold Time

SE

s
mm/s

SE15 SE23 SE30 SE45

s, mm

0
Accel.

Cons.

Decel.

Positioning TimeTimes
Positioning Time (Stroke)

Distance
Load distribution (see below)

mm
mm

X=

mm

Z=

Wall
installation

VerticalGrease (brand) / Unless otherwise specified, Multemp PS No. 2 Grease (KYODO YUSHI CO.,LTD.) will be used as lubricant.
Environmental conditions

Temp.

Dust

Humidity

Gas

Clean room

VacuumOthersParallel motor mounting

Required

Not required

Liquid%Name of motor
Actuator quantity per a machine

Quantity for prototype
Change control

Yes

SensorQuantity of mass production

No

Ballscrew actuator specifications
Size

Lead

Dust-preventive coverSensorGuide rail length

Slide block
Type:

Precision gradeSurface treatment

Qty:

Technical Data

Additional description / request*KURODA office

SC SC23 SC30 SC45

HorizontalmmY=*Contact personnel

133