Hitachi VB 16Y Manuel

POWER TOOLS

TECHNICAL DATA

AND

SERVICE MANUAL

PORTABLE REBAR CUTTER/BENDER

VB 16Y

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST No. 0790 Sep. 2001

MODEL

VB 16Y

REMARK:

Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s)

is(are) used in the place of company name(s) and model name(s) of our

competitor(s). The symbol(s) utilized here is(are) as follows:

Symbols Utilized Competitors

Company Name Model Name

JET RCB-16

Page

CONTENTS

1. PRODUCT NAME ........................................................................................................................... 1

2. MARKETING OBJECTIVE ............................................................................................................. 1

3. APPLICATIONS .............................................................................................................................. 1

4. CAPACITY ...................................................................................................................................... 1

5. SELLING POINTS .......................................................................................................................... 1

5-1. Selling Point Descriptions ............................................................................................................... 2

6. SPECIFICATIONS .......................................................................................................................... 3

6.1 Optional Parts .................................................................................................................................. 3

7. COMPARISONS WITH SIMILAR PRODUCTS .............................................................................. 4

7-1. Working Efficiency Comparison ...................................................................................................... 4

8. HOW TO USE THIS UNIT .............................................................................................................. 5

9. SERVICE LIFE OF CUTTER .......................................................................................................... 5

10. PRECAUTIONS IN SALES PROMOTION ................................................................................... 5

10-1. Handling Instructions .................................................................................................................... 5

11. SAFETY INSTRUCTIONS ............................................................................................................ 6

11-1. Pictograph Illustration and Explanation......................................................................................... 7

12. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY .......................................................... 8

12-1. Disassembly ................................................................................................................................ 8

12-2. Reassembly ................................................................................................................................ 14

12-3. Wiring Diagram ........................................................................................................................... 14

12-4. Confirmation after Reassembly .................................................................................................. 18

12-5. Tightening Torque ....................................................................................................................... 20

12-6. Insulation Tests ........................................................................................................................... 20

12-7. No-load Current Value ................................................................................................................ 20

13. STANDARD REPAIR TIME (UNIT) SCHEDULES ..................................................................... 21

Assembly Diagram for VB 16Y

--- 1 ---

1. PRODUCT NAME

Hitachi Portable Rebar Cutter/Bender, Model VB 16Y

2. MARKETING OBJECTIVE

A compact and lightweight power tool that reduces worker fatigue and enhances work efficiency.

3. APPLICATIONS

Cutting and bending of rebars (concrete reinforcing rod) during construction of foundations and external

structures.

Cutting and bending of rebars for fitting building parts during construction of reinforced concrete buildings.

4. CAPACITY

Rebar diameter: Max. 16 mm (5/8")

5. SELLING POINTS

Double-insulated

structure Reaction

receiver

Built-in slip

clutch

Hole for bolting

to a fixed base Center roller diameter: 62 mm (standard)

50 mm (optional)

38 mm (optional)

Changeable bending diameter

Easy to operate

Excellent cost/performance

ratio

Fig. 1

--- 2 ---

5-1. Selling Point Descriptions

5-1-1. Excellent cost/performance ratio

The Model VB 16Y is about two-thirds the price of ordinary electric cutters or benders which have only single

functions while the Model VB 16Y can perform both cutting and bending (16 mm (5/8") dia. rebar) with one unit. If

comparisons are made with another maker's electro-hydraulic cutter/benders (capacity rebar dia. 16 mm (5/8")),

the Model VB 16Y is about half the price of the electro-hydraulic cutter/bender and the cost/performance ratio is

excellent. This is because the Model VB 16Y is equipped with a gear and a cam instead of a hydraulic system for

cutting rebars, and an advanced microprocessor instead of an electromagnetic clutch for bending rebars.

5-1-2. Easy to operate

Rebars can be easily cut or bent just by operating the setting dial and the trigger switch.

5-1-3. Changeable bending diameter

The diameter of the standard center roller is 62 mm (2-29/64") {R31 mm (1-7/32")}. The bending diameter is

changeable to 38 mm (1-1/2") {R19 mm (1-3/4")} or 50 mm (1-31/32") {R25 mm (63/64")} by using the optional

center roller sets.

5-1-4. Double-insulated structure

The Model VB 16Y has double-insulated structure for safety in use outdoors or below the ground.

5-1-5. Reaction receiver

There is a need to prevent movement of the unit caused by cutting 5 m (197")-long rebars generally used in

construction sites. The Model VB 16Y has two reaction receivers at the front and the rear for stable operation.

5-1-6. Hole for bolting to a fixed base

A hole is provided at the center of the unit to fix and stabilize it. This hole comes in quite handy for bending

operations because it allows the unit to be bolted to a suitable work bench (bolt size M10, less than W3/8).

5-1-7. Built-in slip clutch

The Model VB 16Y is equipped with a slip clutch to protect the mechanism. The slip clutch functions if a rebar

beyond the capacity of the Model VB 16Y is attempted to be bent or cut. When the slip clutch works, a big slip

noise occurs but it is not a malfunction.

--- 3 ---

Bending

10 mm (3/8") max. ••••• 3 pieces

12 mm (1/2") max. ••••• 2 piece

16 mm (5/8") max. ••••• 1 piece

Capacities

Number of pieces that can be

processed at one time

Motor type

Enclosure

Insulation structure

Switch

Power source

Voltage and current

Power input

Rotation speed

Weight

Packaging

Cord

Standard accessories

6. SPECIFICATIONS

VB 16Y

(1) Material; Rebar: Yield strength 460N/mm2(47 kgf/mm2) max.

GRADE 460 (Great Britain)

BST 500 (Germany)

B 500 (Spain)

or equivalent grades

(2) Max. rebar diameter: 16 mm (5/8")

AC single-phase series commutator motor

Materials: Aluminum alloy die cast

Glass-fiber reinforced resin (Housing, handle, tail cover)

Painting: Silver, light green, black

Double insulation

Trigger switch

Single-phase AC 50 Hz

2.3 A (230 V)

510 W

14.5 min-1

Product: 17.0 kg (37.5 lbs.); excluding cord

Packed: 19.7 kg (43.4 lbs.)

Corrugated cardboard box

Two-core cabtire cable

2.5 m (8.2 ft.)

Allen key (for M5 hexagon socket bolt) ••••••••••••••••••••••••••••••••••••• 1 pc.

One set of cutters ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1 set.

Cutting

10 mm (3/8") max. ••••• 2 pieces

12 mm (1/2") max. ••••• 1 piece

16 mm (5/8") max. ••••• 1 piece

Model

6.1 Optional Parts

1. Cutter 2. Center roller (D38) set

3. Center roller (D50) set 4. Case

*Outer dimensions

525 x 346 x 236 (mm)

Code No. 314837

*A set of two cutters

Code No. 319706

* This is used when the

bending diameter of a

rebar is changed to

38 - 40 mm.

Code No. 319712

(The bending diameter

of the standard center

roller is 62 - 64 mm.)

38 mm diameter

(R19 mm)

* This is used when the bending diameter of a

rebar is changed to 50 - 52 mm.

Code No. 319713

(The bending diameter of the standard center roller is 62 - 64 mm.)

50 mm diameter (R25 mm)

Net

Gross

Type

Overall length

Fig. 2

--- 4 ---

7. COMPARISONS WITH SIMILAR PRODUCTS

Specification Comparisons

Fig. 3

Load

Manual cutter/bender

Length

Height

Width

Maker

Model name

Power Input

Rotation Speed

Dimensions

Insulation Structure

Full-load vibration level

No-load noise level

min-1

dB (VL)

dB (A)

Weight (excluding cord)

1,300

(51-3/16")

195

(7-43/64")

125

(4-59/64")

16.1

(35.5 Ibs.)

HITACHI

VB16Y

510

14.5

466

(18-11/32")

212

(8-11/32")

231

(9-3/32")

Double

Insulation

17.0

(37.5 Ibs.)

HITACHI

VB13Y

285

430

(16-15/16")

196

(7-3/4")

197

(7-3/4")

Double

Insulation

91.4

12.0

(26.5 Ibs.)

7-1. Working Efficiency Comparison

Maker

Model name P

Capacity Rebar Dia. mm 16 (5/8") 13 (1/2") 16 (5/8")

Drive system

Provided

(slip clutch). Motorized gear

drive system Manual

HITACHI

VB 16Y

HITACHI

VB 13Y

Cutting time*2

Bending time (180˚)*2

seconds/operation

3.1

5.1

3.2

4 30 (569N)*3

10 mm (3/8") max.

12 mm (1/2") max.

16 mm (5/8") max.

10 mm (3/8") max.

12 mm (1/2") max.

16 mm (5/8") max.

62 mm dia. (2-29/64")

38 mm dia. (1-1/2")*1

50 mm dia. (1-31/32")*1

38 mm dia. (1-1/2")

25 mm dia. (63/64")*1

36 mm dia. (1-27/64")

2 pieces

3 pieces

1 piece

2 pieces

1 piece

2 pieces

1 piece

2 pieces

1 piece

2 pieces

1 piece

15 (794N)*3

*1: These are values when using the optional accessories.

*2: These are values when cutting or bending maximum capacity rebars (the time required from turning on the

switch to completion of cutting or bending).

*3: The values in parentheses mean the loads.

Overload protector

Number of pieces that

can be cut at one time

Center roller diameter

Number of pieces that

can be bent at one time

Motorized gear

drive system

Not provided.

--- 5 ---

0˚

RETURN

CUT

45˚

90˚

135˚

180˚

8. HOW TO USE THIS UNIT

(1) Cutting work (Fig.4)

(2) Bending work (Fig. 5)

Fig.4

Fig. 5

Fig. 6

Rebar

Cutter

Setting dial

Alignment mark

ON-OFF switch

Rebar

ON-OFF switch

Bending roller

To switch between cutting and bending

To adjust bending angle (0 ﬂ

---

180 ﬂ)

9. SERVICE LIFE OF CUTTER

Repeated cutting of the rebar can result in the "wear and tear", "deformation", "nicked edges", etc. Replace it with

a new cutter after cutting about 8,000 pieces of rebar (a rough guide).

10. PRECAUTIONS IN SALES PROMOTION

In the interest of promoting the safest and most efficient use of the Model VB 16Y Portable Rebar Cutter/Bender

by all of our customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer

seriously recognizes the importance of the contents of the Handling Instructions, and fully understands the

meaning of the precautions listed on the Caution Plate attached to each tool.

10-1. Handling Instructions

Salespersons must be thoroughly familiar with the contents of the Handling Instructions in order to give pertinent

advice to the customer. In particular, they must have a thorough understanding of the precautions for use of the

portable rebar cutter/bender which is different from those of ordinary electric power tools.

--- 6 ---

11. SAFETY INSTRUCTIONS

Be particularly careful to ensure that the customer understands the following precautions which are listed on the

Handling Instructions and Caution Plates attached to the main body of each tool.

Fig. 7

(1) Do not cut and/or bend any materials other than the rebars.

Avoid any work exceeding the maximum capacities of the unit described in the specifications. For example,

cutting or bending a hard rebar made of PC steel will not only damage the cutter but also there will be a fear of

the broken rebar fragments flying around. A slip clutch is built in the Model VB 16Y to protect the mechanism.

If the material with the diameter or quality beyond the capacity is processed, the slip clutch can sometimes

function. In such a case, stop processing immediately and check the material. When the slip clutch works, a

big slip noise occurs, but it is not a malfunction.

(2) Make absolutely sure that the cutter cover is closed when you do not carry

out the cutting work.

If the cover is kept open, the cutter can jam on foreign objects and cause

serious accidents.

(3) Reserve an extra length of at least 200 mm (8") on the bending length of the

rebar to be bent (Fig. 7).

If the extra length is not long enough, the rebar can come off during bending

operation, or it can break into fragments and scatter dangerously.

(4) Observe the specified number of rebars that can be bent or cut at one time.

Rebar of 10 mm (3/8") diameter: 3 pieces maximum

Rebar of 13 mm (1/2") diameter: 2 pieces maximum

Rebar of 16 mm (5/8") diameter: 1 piece

Rebar of 10 mm (3/8") diameter: 2 pieces maximum

Rebar of 13 mm (1/2") diameter: 1 piece

Rebar of 16 mm (5/8") diameter: 1 piece

Extra length

200 mm (8 ") or

(5) Setting bending angles by setting dial

Even at the same dial setting position, the bending angle can sometimes differ if the diameter or hardness of

the rebar is different. Use the angle marks merely as a rough guide. (Refer to the Handling Instructions and

Caution Plates attached to the main body of each tool for details.) When replacing with the optional center

roller set, the bending angle may be slightly smaller than the set angle. Instruct the customers to set the

bending angle about 5 - 15˚larger than the desired angle when replacing with the optional center roller (D38)

set or the center roller (D50) set.

--- 7 ---

11-1. Pictograph Illustration and Explanation

If you bend the rebar with a large angle while placing your hand onto it, there is

a fear of getting your hand caught in by the fold-back reaction of the rebar.

Never place your hand onto the position where the rebar may fold back.

The cutter blade can get worn out by repeated rebar cutting. Continued use of

a worn-out cutter can result in the damage and the broken pieces flying

around. Replace it with a new cutter after approximately 8,000 times of cutting

as a rough guide.

The machine is so designed that the upper cutter and the grip rubber can

support a rebar.

If the grip rubber gets worn out, there is a fear that it cannot sufficiently hold the

rebar and gets broken down with its parts flying around, etc.

If the grip rubber cannot hold the rebar much longer, replace it with a new grip

rubber.

During cutting work, securely hook the rebar to the reaction stopper B.

Furthermore, secure enough length of a rebar to be hooked to the reaction

stopper B.

Avoid bringing your hand near to the reaction stopper B during operation;

otherwise, you may get your finger caught in or may run the hazard of other

injuries.

Set the rebar in the center or the recess of the cutter during cutting work. Any

cutting work with the rebar set on corners or ends of the cutter can result in the

pieces of broken rebar flying around or the damage to the cutter and the

machine.

Read handling

instructions before use.

Never bring your hand

close to the cutter

during operation.

Begin operation only after

ensuring that there are no

people within the turning range

of the material to be bent.

Do not use this electric

power tools in wet

weather conditions.

If the switch is turned off and then

immediately turned on again, the motor

may not start. Wait for at least one full

second before attempting to turn the motor

on again after it has been switched off.

Avoid any work exceeding

the maximum capacities.

(Rebar diameter: 16 mm dia. (5/8"))

(Returning halfway)

1 Select RETURN with the dial.

2 Pull the trigger.

(Selecting the rebar size)

Select the rebar size and the

bending angle.

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