Master RB16 User manual

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OPERATION MANUAL
RB16 25 32 Portable Rebar Bender
P E R F O R M A N C E · E F F I C I E N T · R E L I A B L E
Master sincerely thanks you for selecting the Concrete Cutting Machine.
For your Safety and proper operation, before you start to operate or carry
out any maintenance on this equipment, YOU MUST READ and STUDY
this manual carefully. Be sure to always keep it ready for reference.
Produced By Henan Master Machinery Co.,Ltd

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Dear Customer,
Thanks for choosing Master machine.
To ensure the safety and proper use of the machine, please read the
instruction book carefully before use.
Also, please fill this card and save it for warranty use.
Buyer Name
Purchase
Time
Tel
Contact
Person
Address
Product Name
Portable Rebar Bender
MODEL
RB16 RB25 RB32B
Motor Model
Note
Thank you very much that you have purchased the products.
This operation manual will tell you how to correctly operate and maintain
your machine. Before using the machine, please read the operation manual
thoroughly to guarantee the correct operation. Following the operation
requirements in the operation manual will make that your machine is in the
best operation state so as to extend the life of the set. For you own safety and
protection injury, carefully read, understand and observe the safety
instructions described in this manual.
Keep this manual or a copy of it with the machine. This machine is built with
user safety in mind; however, it can present hazards if improperly operate and
serviced. Follow operating instructions carefully!

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GENERAL SAFETY PRECAUTIONS
USAGE
Use rebar bender on concrete re-inforcing bars only.
RESRICT USE TO DESIGNATED MATERIALS
Don’t use the machine to bend very hard rebar.The hard rebar may
break and will also damage the tool. Do not attempt to bend rebars.
Harder,thicker or thinner than those specified (see page 5).
USE EYE PROTECTION
Wear safety goggles,safety glasses with side shields or a face shield
while using bender.
PROVIDE SAFETY BARRIERS
Erect safety screens to protect co-workers from possible flying
ends.Place safety screen under the rebar when working in high places.
GUARD AGAINST ELECTRIC SHOCK
To avoid possible electric shock,do not handle bender with wet hands
or use bender in the rain or damp places.Be aware of all power
lines,electric circuits and other hazards that may be
contacted,especially those that are below the surface or otherwise
hidden from view
UNPLUG TOOL

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Disconnect bender from outlet while not in use and before
cleaning,adjusting or servicing.Do not disconnect plug from outlet by
pulling the cord.Always check that the switch lock is OFF before
plugging in.
BEWARE OF ENVIRONMENT
Do not use bender in the presence of flammable materials(e.g.
paint,thinner, petroleum products ,adhesives).
Do not use bender in a possibly lighted and clear of
obstructions.Operator should at all times have an unobstructed view
of the cutter,rebar and surrounding area.
WEAR PROPER APPAREL
Do not wear loose clothes,dangling objects or jewellery.Restrain
long hair. The use of a safety-helmet and rubber soled boots is
recommended.If safety gloves are worn,be especially careful that
gloves does not get caught in moving parts
KEEP VISITORS AWAY
Keep all visitors at a safe distance from the work area for their own
protection And to prevent distraction of the operator.

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MAINTAIN BENDER WITH CARE
Inspect bender before each application.Keep handle dry,clean and free
from oil and/or grease.Keep housing and piston free of dirt and iron
filings.Check that no screws or bolts are loose or missing.Following
instructions for maintenance.Inspect switch,cord,Plug and any
extension cable at regular intervals.
STORE CAREFULLY
When not in use,store bender and accessories in a dry place where
they can’t be accessed by unauthorized persons.
PARTS AND SPECIFICATIONS OF NRB-32
1.Handl
e
2.Switc
h
3.Mode control
lever 4.Oil plug
5.Front
handle
6.Hook
7.Roller
8. Housing
9. Motor

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PARTS AND SPECIFICATIONS OF RB-16
Model
NRB-32
NRB-25
NRB-22
RB-16
Voltage +
5%
□100/115V □220-240V AC only
Wattage
1600 W
1500W
1200W
900W
Dimensions
560*260*200
560*170*220
mm
580*170*210
mm
600*170*200
mm
Weight
24 Kg
16 Kg
16KG
15KG
Max.rebar
diameter
32 mm
25mm
22mm
16mm
Min.rebar
diameter
4mm
4mm
4mm
4mm
Max.rebar
hardness
Tensile strength 650N/mm2
Bending
speed
5.0 -8.0 sec.
5.0s
4-5S
4-5s

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OPERATING INSTRUCTIONS
! CAUTION: Indicates hazard that could result in minor personal
injury and/or product damage.
CARE: Indicates hazard that will result in product
damage. PRE-USE CHECKS
1.Check oil level.
2.Check condition of bender blocks and tightness of bender block
bolts. 3.Check that the power source is appropriate to the bender
CARE: if voltage is too high,the motor will burn out.If the voltage
is too Low,insufficient power will be generated.Never use DC
power.
4.Check that power supply is properly earthed.
! CAUTION:Failure to earth power supply may result in electric shock to
operator.
5.Check that cord is undamaged and that plug is not loose.
If an extension cable is to be used,make sure that it is undamaged and
that it is the proper thickness for the length.See table below.
Cable length
110/115V
230V
Cable size (AWG)
Nominal diameter
Up to 10m (33 ft )
16
1.0mm²
Up to 15m (50 ft )
14
1.25mm²
Up to 30m (100 ft ) 10 1.5mm²

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6.Before plugging in,make sure that the switch lock is OFF.
WARM-UP
In cold weather,warm up unit for 30~60 seconds so that the
hydraulic oil reaches the proper viscosity.Pull trigger-switch to
extend piston and release when it has reached its full stroke.Repeat
15~20 times.
POINTS OF ATTENTION
1.Do not cover air vents.
CARE: If events are covered,motor will overheat and may burn
out. 2.If hydraulic oil exceeds 70.( (158.F) in temperature,
power will drop.
Allow unit to cool before resuming operation.(Be particularly
careful in summer, when the aluminum pump case heats up
quicker.)
3.If a drop in power is observed and motor is unusually hot, check
carbon-Brushes.
OPERATION
The NRB-32 is primarily intended to straighten deformed rebar. It
can or course , also be used to bend straight rebar.
To enable the unit to be used in confined spaces, there are two

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operating modes: PUSH & PULL. The mode is selected by
moving the mode control lever to the appropriate position.
“A” for push (piston advances) and “B” for
pull
(pisto
n retracts) in either mode, simply press the switch to
move the piston
NB: The movement of the piston is limited by a safety valve. To
prevent overheating , release the trigger switch when the piston has
reached its travel limit.
TO PUSH
Advance or retract the piston so that the hook is in a suitable starting
position . Set the mode control lever to “A” and fit the rebar as shown
at the left. Pull the trigger switch until the rebar is at the desired angle.
TO PULL
Set the hook in the correct starting position, make sure that the mode
control lever is in the “B” position and fit the rebar as illustrated . Pull
the trigger switch until the desired angle is attained.

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NB: It is important that the rebar be properly fitted in the hook and
against the rollers.
INTERIOR ANGLE
Since the piston stroke is limited , interior straightening/bending angle
will vary according to rebar diameter and operating mode. Refer to
the table below.
MAINTENANCE
CLEANING
Cleaning bender every day,preferably immediately after use.
!CAUTION: Wear gloves to protect hands from metal splinters.Do
not use an air-gun:blasting with air can cause metal filings and/or
dust to get into eyes and respiratory system.
1.Disconnect unit.
2.Wipe or brush away all dirt and metal filings.Pay particular attention
to the lower half of the piston, where dirt is more easily accumulated.
OIL-LEVEL CHECK
As the bender is hydraulically operated,the oil-level must be
checked at frequent intervals,preferably every day.Failure to
maintain the oil at the proper level results in a drop in pressure and
loss of bending power

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!CAUTION: Hydraulic oil is highly flammable.Keep away from
sparks and naked flame.Do not smoke.
!CAUTION:Hydraulic oil may cause inflammation of the eyes and
skin.If ingested,it will cause diarrhoea and vomiting. In case of eye
contact, rinse in clean water for at least 15 minutes And consult a
physician.
In case of skin contact, wash thoroughly with soap and
water. In case of ingestion, consult a physician
immediately. Do not Deliberately induce vomiting.
1. Oil should be warm but not hot. Warm up unit if cold.
2. Adust stopper and make three or four cuts, noting exactly at what point
the Rebar is actually breaking.
3. Pinch a short piece of rebar,stopping just before it breaks off. Unplug
unit From power source.
4. with partially severed rebar in place, turn unit over so that oil-plug is
uppermost. ( If unit is hot,allow to cool down.)
5. Remove oil-plug and seal-washer (packing).
!CAUTION: Never remove oil-plug when unit is hot or oil will spurt out.
6. Check that oil is level with bottom of plug hole(i.e. that pump case is full
to The brim). If oil level is too low,top up with 20-weight hydraulic oil
with Anti-foam and anti-abrasion properties (ISO viscosity grade VG46,
e.g. Shell Oil Tellus 46, Mobil oil DTE-25 or Esso Uni power SQ46 ).

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7. After topping up, extract air from system.Gently tilt cutter lengthwise
and Return it to a level position.Top up again and tilt in the opposite
direction. Repeat this process until all air has been extracted.CARE:
Bender cannot function properly if oil contains air bubbles.
8. Replace seal washer (packing) and plug. Connect cutter to power source
and completely sever rebar.
OIL-CHANGE
The hydraulic oil should be changed at least once a year,sooner if it
appears dirty.
Unplug unit from power source. Remove oil-plug and packing.Turn bender Over
and drain oil into a suitable receptacle.When oil ceases to drain out, tilt unit to rear
so that oil trapped in the piston housing can run out. When housing is empty,tilt
unit in the opposite direction to empty residue in the pump case.
1.With drain-hole uppermost, slowly fill the unit with fresh oil. Replace
plug And lightly tighten. Connect unit to power source and advance
piston two or three times.Unplug unit and remove oil-plug.Top up
oil-level and replace plug.
2.Finally,follow procedure for oil-level check.( Steps 2~8.)
Note: Dispose of hydraulic oil in accordance with local regulations.
Do not Pour into the sea, a river, a lake or drains.
BOLT TIGHTNESS
Once a week, or after every 500 bends, check the tightness of all
bolts, especially those securing the housing to the cylinder. Loose
bolts will result in a loss of power.

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CARBON BRUSHES
Inspect the two carbon brushes at least once every two
months,(Nominal brush life is 200 hours).
CARE: worn brushes will result in power loss, cause the motor to
run hot And irreparably damage the armature’s commutator.
1.Disconnect unit.
2.Unscrew both brush caps and pull out carbon
brushes. 3.Replace brushes if less than 6 cm in length