Cut & Bending Machine

CB-5
OPERATION & MAINTENANCE MANUAL

Page

1. For safe use ---------------------

1

2. Components’ names ------------ 4
3. Preparation before working --5

4. How to operate ----------------

6

5. How to process ---------------

6

6 Maintenance -------------------

8

7 Main specifications ------------

10

8 Trouble shooting ---------------

11

9. Guarantee ----------------------- 12

1

1. FOR SAFE USE
Two types of pictorial symbols are used in this instruction manual to ensure correct use of theproduct and to prevent harm to you or others or damage to property. The symbols and theirmeanings are as follows. Please read the text after understanding the contents carefully.
As the result of improper use or operation in disregard of the⚠ WARNING indications, dangerous states may happen, causing the risk of deathor serious injury.

⚠ CAUTIONAs the result of improper use or operation in disregard of theindications, it will cause the possibility of slight or medium degreeof injury or material damage only.

Cautions when installed⚠ WARNING◼

Please install the product on a flat and stable surface.
Do not install the product in an unstable place, such as on a wobbly stand or on a tilt.
If the product falls, it may cause injury.

◼

When moving the product, be sure to have two or more people carry it.

◼

Do not use the product in places where there is a risk of ignition or explosion.
Do not use the product in a place where flammable liquids or gases are present. Thereis a risk of explosion or fire.

⚠ CAUTION◼

Please avoid rain and moisture, and use it in a place with as little dust as possible.

◼

Avoid direct sunlight during the summer months, as the temperature of the hydraulicfluid may rise, causing problems with processing and equipment.

◼

If the pump is used outdoors in extremely cold weather, attach a winter cover to thepump. The viscosity of the hydraulic fluid will increase as the temperature of the fluid
drops, which may cause problems with processing and equipment.

2Cautions when in use.

⚠ WARNING◼

Do not disassemble or modify the product.
Do not disassemble except where instructed to do so (e.g., at the fuel supply valve). In
particular, do not change the relief pressure setting. Do not attempt to change therelief pressure setting, as this may result in incomplete processing or damage to theframe or tools.

◼

Be careful of electric shock.
Do not pull out the power plug with wet hands.
Be sure to ground the unit with the grounding clip on the power plug before use.
Do not use this product near an electric welding machine or on grounded materials orequipment.

◼

Use the "UP-35RH-CB" electric pump.
This machine is designed for 34.3MPa (350kg/cm2). The use of other pumps,
especially those with different pressure settings, may result in incomplete processing
or damage to the frame and tools.

◼

Never put your hand or any part of your body near the cutting blade or bending die
during operation.

⚠ CAUTION◼

Do not work beyond the capacity of the machine.
If you work beyond the capacity of the machine, it will not be able to process perfectly.
It will also damage the equipment.

◼

Always work alone. It is dangerous to work with more than one person.

◼

The power supply for the electric pump is AC100V or AC110V or AC200V or AC 220V
(50/60Hz) single phase. It depends on a country.

◼

If the pump is used at the wrong voltage (a low voltage), it may burn out or generate
heat.
Please pay attention to the voltage drop especially when using a generator.

◼

When unplugging the power supply from the outlet, be sure to grab the power plugand pull it out. Pulling the power cord out of the outlet without grasping the powerplug may result in disconnection or short circuit.

◼

When using an auxiliary cord, use a cord with a thickness of 1.25 mm2 or greater and alength of 10 m or less to prevent voltage drop.

3Cautions when in use.

⚠ CAUTION◼

Connect the coupler securely in the following manner.
Unplugthepower

supplybefore connecting the coupler.

① Remove the coupler cap.
Make sure there is no dust or
debris on the connection.
② Insert the coupler (female)
into the coupler (male) all theway to the back.

③ Turn the bag nut of the coupler(female) and tighten it.
④ Pull the main unit and highpressure hose to make surethere is no rattle.
⑤ To remove the coupler, loosen
the bag nut of the female
coupler by turning it, pull it outof the bag nut, and then pullout the male coupler. Whenremoving the coupler, makesure that no pressure is being
applied before proceeding.
After removing the coupler,put on the cap to prevent dust
from sticking to it.

4

2. COMPONENTS’ NAMES
Cut & Bending machine (CB-5)

Electrical pump (UP-35RH-CB)

5

3. PREPARATION BEFORE WORKING3-1) Checking the productPlease make sure that there is no damage or oil leakage during transportation.
3-2) Checking the power supply
The power supply for the electric pump is AC100V or AC110V or AC200V or AC 220V
(50/60Hz) single phase. It depends on a country. Be sure to ground the unit when using it.
3-3) Connecting the metal connector
Insert the metal connector (plug) on the pump side into the metal connector (adapter) on thecontrol switch side, and tighten the ring of the plug to the adapter by turning it clockwise tomake a secure connection.

3-4) Checking the hydraulic oil (in case of a drop in work efficiency or abnormality)
When the work efficiency drops or an abnormality occurs, one of the causes may beinsufficient oil level. To check the oil level, follow the steps below.
(1) Make sure that the tool is in the fully returned state. (2) Unplug the power supply.
(3) Stand the pump upright with the oil tank side down. Turn the oil supply plugcounterclockwise with a flat head screwdriver to remove it. At this time, be careful not to lose
the O-ring. (5) Clean the oil gauge part of the removed plug with a cloth, etc., and then insert
it back into the oil supply port. At this time, do not screw it in, but make sure that it touches
the oil supply port. (6) If the oil gauge is filled to the upper limit, it is normal. If it is low,
replenish the oil. (7) After confirming that the oil level is normal, turn the oil cap clockwise
to tighten it. Be careful not to tighten it too much, or the O-ring will be damaged.

64. HOW TO OPERATEa) When the A switch is pressed, the motor will rotate and the tool will descend. When you
release the switch, the motor stops and the tool stops at that position.
b) Pressing the B switch once will raise the tool and return it. It is not possible to stop during
the return process.

5. HOW TO PROCESS⚠ CAUTION

Never cut and bend at the same time.

5-1) Capacity
The limit capacity is as follows. Never process more than the capacity.
Thickness: Steel: 1.6 mm / Stainless steel - 1.2mm
Processing width: 300mm /For steel, plate thickness of 2.3mm can be processed up to100mm in width, and plate thickness of 3.2mm can be processed up to 35mm in width.
5-2) Cutting
To cut, follow the steps below.
(1) Make sure that no pressure is applied.
(2) Set the workpiece.
Insert the workpiece between the table and the guide.
Place the workpiece at least 10 mm ahead of the cutting edge.
If it is shorter than this, the workpiece may bite the cuttingedge and make it impossible to work.
a. Cutting a long workpiece
Draw a rule on the workpiece.
Then decide the position while looking at A (blade) in the figure.

Ａ7b. Cutting a short workpiece (70 mm or less)
The scale on the cutting guide plate indicates the distance from the cutting edge. Use this asa guide when positioning the workpiece.
(3) The cutting edge descends when pressing the A of operation switch. The UP-35RH-CB
is a pump with high stopping accuracy. If you release the A switch, it will stop at that position.
Gradually move the blade down and adjust the cutting position.
5-3) Bending
For bending, follow the steps below.
(1) Make sure that no pressure is applied.
(2) Positioning of the workpiece
Insert the workpiece between the upper die and the lower die,and set it at the center of the die.
Adjust the bending position by the position of the guide plate.
The adjustment range is 10 mm to 54.5 mm from the bending part.
If the adjustment range is exceeded, remove the two locking screws
on both sides of the guide plate and remove the guide plate.
The guide plate can be moved back and forth by loosening
the two locking screws on both sides.
To determine the position of the guide plate,
apply a scale to both ends of the guide plate and match the distance.
Once the position is determined, tighten the locking screws to fix it in place.
(3) Insert the workpiece until it touches the guide plate. If the guide plate has been removed,use a squeegee to align the workpiece.
(4) While the A switch is pressed, the upper die descends.
The angle of the groove of the lower die is 90°, but the bending angle at the stroke end varies
depending on the thickness and width of the workpiece. If an accurate angle is required, werecommend using a pressure gauge to control the angle or an optional pressure switch.
The UP-35RH-CB is a pump with high stopping accuracy. If you release the A switch, it willstop at that position. Gradually move the upper die down and adjust the bending position.
(5) When the bending is completed, press the B switch on the operation switch to return theupper bending die to its original position.
Relationship between pressure and bending width in 90° bending process unit：Mpa（kg/cm2）
Material/width

50mm

100mm

150mm

200mm

250mm

300mm

SS400

6.9（70）13.2（135）

19.1（195）

21.6（220）25（255）28.9（295）SUS304

7.4（75）12.7（130）19.6（200）23.5（240）27.4（280）

32.3（330）

86. MAINTENANCE
6-1) Hydraulic oil / fluid(a) Type
As a general rule, use genuine oil NHO-32 (1 liter).
In case of emergency, use high quality hydraulic oil (ISO standard 32Cst).
(b) Temperature
The proper operating temperature for hydraulic fluid is 55℃ or lower. If the color of thetemperature seal attached to the tank changes, the oil temperature has risen above 55°C.
Stop working until the temperature drops to the proper level.

(c) Changing oil
The hydraulic fluid should be changed after 300 hours of operation or 3 months. The
replacement procedure is as follows:(1) With no pressure applied, unplug the power supply.
(2) Remove the coupler.
(3) Stand the pump upright with the tank side down.
(4) Turn the oil supply plug counterclockwise to loosen and remove it.
Be careful not to lose the O-ring.
(5) Put the oil supply port down and drain the hydraulic oil.
(6) Put in new hydraulic fluid. For the amount of oil, refer to "3-4) Checking the hydraulicoil".
(7) Turn the oil supply cap clockwise and screw it in.
Do not forget to install the O-ring. Do not forget to install the O-ring, and be careful not toover-tighten it, as it may damage the O-ring.
(8) Wipe off the oil from the oil supply port and the surrounding area.
Immediately after replacing the hydraulic fluid, air may enter the pump, and the operation
may become unstable. In this case, bleed the air by referring to "6-4) Bleeding the pump".

96-2) Hose for high pressure
The high pressure hose will deteriorate after a long period of use, so it should be replaced
every two years. When replacing the hose, use the genuine hose as a rule.
For urgent use, use a high pressure hose with a normal pressure of 34.3MPa (350kg/cm2) or
higher (mounting screw is PT3/8). Use a hose with as large a bending radius as possible.
(Minimum bending radius: 70mm)
When connecting the tapered pipe screw to the hose piping or to various valves and couplers,
wrap a sealing tape around the screw and refer to the tapered screw tightening torque tablebelow, taking care not to over-tighten.
NPT,PT size

Tightening torque N-m (kgf・m)

1/8

13 -

14 (1.3 -1.4 )

1/4

30 -

40 (3.0 -4.0 )3/8

60 -70 (6.0 -7.0 )1/2

100 - 110 ( 10.0 - 11.0 )When replacing the tapered screw, be careful to remove all remaining sealing tape from theinside of the female screw to prevent it from entering the equipment or circuit. The same
applies to the removed male screw.
6-3) Coupler
Use the genuine coupler. If any other coupler is used, oil will not be discharged.
6-4) Bleeding the pump
Air may enter the pump after the hydraulic fluid and hose have been replaced, or when thepump is operated with insufficient hydraulic fluid. If this happens, the tool may not operate,or it may operate erratically, or the pressure may not increase. In this case, follow theprocedure below to bleed the air.
(When removing the air, remove the coupler and use the pump alone.)(1) Check the amount of oil.
For the method of checking, refer to "3-4) Checking the hydraulic oil".
(2) If the problem persists even after replenishing the hydraulic fluid,
intermittently press A and B on the control switch for 2 to 3 minutes
while the pump is standing.

7. MAIN SPECIFIATIONS

10

CUT & BENDING MACHINE (CB-5)

Cylinder
Model

Flame

OutputMax pressure

StrokeSize

WeightTON

MPa (kgf/cm2)

mmmm

kg

534.3 ( 350 )

10410(W)x136(D)x370(H)

50

CB-5

Hydraulic pump (UP-35RH-CB)

Motor ( 50/60Hz )Model

UP-35RH-PS

Insulation

Voltageclass(V)

Model

AC

E type100

Pump capacity

Oil tank

Motor

Rotation

Max pressure

Dischargekw(HP)rpm

MPa ( kgf/cm2)

l/min

0.35Single （1/3）
整流子2000HighLow

HighLow

34.3

0.98

0.3

1.0

Amount Effective 重 量1.0（350） （10）●High pressure hose 1.5m included●Operation: pressure holding and intermediate stop are possible (*stop on return is not possible).
●The oil tank is closed type, so it can be used in any direction.

油量kg

0.87.5

118. TROUBLE SHOOTING

129. WARRANTY9-1) Warranty period
Within 365 days from the end of production month for general defect / failure.
i.e. If a customer purchase a pump on January 1, 2021, the warranty period is until
January 31, 2022.
9-2) Warranty condition
All NITTOH products and parts, with the exception mentioned below, are warranted
against defects in materials and workmanship, which results in damage to products
and parts.
9-3 Warranty exceptions
No warranty claim will be accepted for damage or breakdown arising for any of thefollowing reasons.
“Abuse or improper use, fair wear and tear, faulty or negligent operation, improper
storage, chemical/ electrical influences or climatic or other effects which cannot berelated specially to faults in manufacture”
No liability is accepted for packing seals, springs, and/ or the like, and the following:◎ Alterations or remodeling on the products undertaken by the purchasers without
any prior notice and agreement to NITTOH.
◎ Severe and very highly frequent use, deviating from product specifications.
◎ Damage due to faulty installation or assembly by purchasers or third parties.
◎ Damage from natural disaster.
◎ Damage from such accidents as fire, submersion, dropping, etc. Read and carefully
follow these instructions. Most problems with new equipment are caused byimproper operation or installation.