Benner-Nawman BN Products JMB-25H User manual

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BN Products-USA www.bnproducts.com
PRODUCT: JMB-25H
REBAR BENDER
OPERATIONS MANUAL
3450 Sabin Brown Road • Wickenburg, AZ 85390
[phone] • [email protected]
JMB-25H 2023 HALF LETTER Operations Manual.indd REV | 0522023

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BN Products-USA www.bnproducts.com
Thank you for choosing our JMB-25H Rebar Bender
This manual covers the proper operation and maintenance.
Before operating, please read this manual carefully for im-
portant procedures and safety.
All technical data and drawings in this manual are consistent
with the information on this product. As a result of revisions
and other on going updates, the contents of this manual
may be slightly dierent from the actual product. BN Prod-
ucts reserves the right to make changes at any time, without
notice and without incurring any obligation, please under-
stand.
The copyright of this instruction manual belongs to us. No
reproduction is allowed without the written consent from BN
Products-USA. All rights are reserved.
This manual is a permanent part of this rebar bender and
should accompany the rebar bender if it is resold.

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BN Products-USA www.bnproducts.com
Please read this manual carefully to ensure the safe use of this bender.
Failure to comply with the instructions in this manual may lead to acci-
dents and injuries. Therefore, make sure to operate the machine in com-
pliance with these instructions. We are not liable for any damage caused to
the machine or injury to the operator resulting from unauthorized modi-
cation of the device or the use of parts that are not genuine.
Basic Specications and Performance
Specications
Classication JMB-25H
Power Supply Single Phase 115V / 60HZ
Current 12 Amp
Motor 2.2 kW
Bending Capacity 25mm ( #8)
Bending Angle 1~180
Bending Time 180 / 7sec.
Weight 132kg
Feature Identication
1. Power Switch
2. Emergency Switch
3. Operation Switch
4. Footing Switch
5. Angle Adjustment Handle
6. Bar Adjustment Stopper
7. Center Roller
8. Moving Roller
9. Spring Tension Bolt
Simultaneous Bending Capacity and Number of Bars
(refer to the front panel of the machine)
Rebar No. No. 3 No. 4 No. 5 No. 6 No. 7 No. 8
JMB-22 4 3 2 2 1 1

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BN Products-USA www.bnproducts.com
Installation and Work Preparation
Installation
• Install the machine on a level, even surface.
• If the ground is not level, use an auxiliary base capable of supporting
the bender rigidly.
Power Connection
• Power cable conductor must be at least 5.5mm2.
• Power cable length must not exceed 50m.
(If it exceeds 50m, use a cable of 8mm2 minimum.)
Work Preparation
• Turn on the power switch. Set the Angle Adjustment at about 135, and
let the machine run idly for at least 3 minutes.
• (Warming up should be at least 5 minutes in winter.)
• Once warmed up, set the desired angle for bending.
• Select the roller according to the thickness of the steel bar.
Bar Diameter Center Roller Moving Roller
#8 1” (25mm) No. 7 - 5.97” (153mm) No. 1 - 2.54” (65mm)
#7 7/8” (22mm) No. 6 - 5.15” (132mm) No. 3 - 3.63” (93mm)
#6 3/4” (19mm) No. 4 - 4.45” (114mm) No. 5 - 4.45” (114mm)
#5 5/8” (16mm) No. 3 - 3.63” (93mm) No. 6 - 5.15” (132mm)
#4 1/2” (13mm) No. 2 - 3.09” (79mm) No. 8 - 6.48” (166mm)
#3 3/8” (10mm) No. 1 - 2.54” (65mm) No. 9 - 7.14” (183mm)
Periodic Check and Maintenance
Trouble Inspection and Maintenance
Excessive noise Check the precision of the reducing
gear.
Check for wear or damage of the gears
in the gearbox.
Bar angle cannot be adjusted Remove foreign matter from the Angle
Adjustment Slide.
Check switch for ease of operation.
Repair or replace as appropriate.

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BN Products-USA www.bnproducts.com
Trouble Inspection and Maintenance
Does not rotate Check Foot Switch connection.
Check if Emergency Switch is pressed.
Check gear connection. Take measures
as necessary.
If motor output power is reduced, re-
place carbon brush of motor.
Electric devices and wiring connection Check connections from time to time.
Fix wiring when necessary.
Check switch operation. Remove for-
eign matter if necessary.
Check wiring connections. Correct bro-
ken or damaged lines.
Clean-up Clean the machine of dust and bar
chips with a brush (do not use com-
pressed air).
Check for cracks or damage in mechan-
ical parts. Replace or request after-ser-
vice as necessary
After the rainy season or after rain, pull
o cover and dry machine completely.
When soaked in water or exposed to
rain, there is a danger of electric shock.
Do not try to use the machine. Call for
service.
Precautions
• Do not exceed the machine’s capacity for simultaneous bending. If
exceeded, machine failure may result.
• When bending rebars while holding them, watch out for your ngers
and prevent accidents.
• Depending on the rebar material, it may fracture during bending, re-
sulting in an accident. Therefore, keep your attention fully focused on
the bending work.
• Ensure that no persons or objects are within the radius of the bending
rebar.
• Since this machine uses electric power, rain or water may cause an
electricity leak. Keep in a dry place or cover with a waterproof lm.
• When moving the machine, check that the transportation handle is
rmly xed.

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BN Products-USA www.bnproducts.com
Repairs and Security
• Replacing the carbon brush - Be sure to isolate the power plug from
the power source. Check the carbon brush for wear when the machine
is not in operation. If the carbon brush in the motor, which is subject
to wear and tear, is worn, the motor will lose power or even stop until
the power is next turned on. In such cases, the carbon brush(es) must
be replaced.
• On the motor inside the machine, unscrew the brush cap with a
straight tip screwdriver, and remove the brush together with the spring
(replace both of the brushes.)
• When replacing the rotating roller or xed roller, clean up with a brush.
• Inspection and Security. Check that bolts and nuts are fully tightened
from time to time.
• Dry the machine suciently after the rainy season or rainfall before
operation
• If the rotating roller jolts when returning to its original position, adjust
it by unscrewing the spring tension adjustment bolt. If it returns too
slowly, tighten the adjustment bolt.
• The machine is ready for operation when the power indicator lamp
lights up after power input and power switch. If the lamp is not lit,
check the power cable connection.
• If the machine does not start up when the power lamp is lit, check the
fuse or check the carbon brush in the motor for wear.
• In the event of other troubles, please call [phone]