Hitachi H 45SR Handbuch

POWER TOOLS

TECHNICAL DATA

AND

SERVICE MANUAL

HAMMER

H 45SR

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST No. E464 May 2002

MODEL

H 45SR

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

MAKITA HM0810

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

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

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

4. SELLING POINTS .......................................................................................................................... 1

4-1. Selling Point Descriptions ............................................................................................................... 2

5. SPECIFICATIONS .......................................................................................................................... 3

5-1. Optional Accessories ...................................................................................................................... 4

6. COMPARISONS WITH SIMILAR PRODUCTS .............................................................................. 6

6-1. Specification Comparison ............................................................................................................... 6

6-2. Demolition Performance Comparison ............................................................................................. 6

6-3. Full-load Vibration Level Comparison ............................................................................................. 7

6-4. Quantity of Working Tool Penetration and Quantity of Body Jumping ............................................ 7

7. PRECAUTIONS IN SALES PROMOTION ..................................................................................... 8

7-1. Handling Instructions ...................................................................................................................... 8

7-2. Caution Plate .................................................................................................................................. 8

7-3. Grease Replacement ...................................................................................................................... 8

7-4. O-Ring Replacement ...................................................................................................................... 9

8. REFERENCE INFORMATION ........................................................................................................9

8-1. Striking Operation ........................................................................................................................... 9

8-2. Idling-Proof Mechanism ................................................................................................................ 10

8-3. Shock-Absorbing Mechanism ....................................................................................................... 10

8-4. Sealed and Dustproof Construction ............................................................................................... 11

8-5. Vibration Absorbing Construction .................................................................................................. 11

8-6. Tool Retainer ................................................................................................................................. 12

8-7. Side Handle .................................................................................................................................. 12

9. REPAIR GUIDE ............................................................................................................................ 13

9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body..................... 13

10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..................................................................... 18

Assembly Diagram for H 45SR

CONTENTS

Page

--- 1 ---

1. PRODUCT NAME

Hitachi Electric Hammer, Model H 45SR

2. MARKETING OBJECTIVE

The Model H 45SR is an upgraded version of the current Model H 41SA, which features the use of Hitachi 17-mm

hexagonal tools. The performance, durability and operability are greatly improved. With this competitive Model

H 45SR, we aim to enhance the share of the Hitachi 17-mm hexagonal shank type hammers.

The main specifications are as follows:

(1) High chipping and demolishing performance with low vibration and noise level

(2) Self-chiseling (Good feeling)

(3) Internal double-insulation construction with sturdy aluminum frame

(4) A highly reliable mechanism for prevention of idle hammering and shock-absorbing mechanism results in

prolonged service life and comfortable operation.

(5) D-type side handle with adjustable mechanism for 360˚ rotation plus positioning from front to rear

(6) Soft-touch grip for easier handling

(7) Easy-to-hold plastic grip for efficient wall chipping

(8) A very original design

3. APPLICATIONS

Demolishing and chiseling of concrete

Edging, gravel road digging, compacting and tamping, grooving, cutting, stripping, roughing and anchor piling

work, etc. (with use of appropriate optional accessories)

4. SELLING POINTS

Hitachi original design

vibration-absorbing handle for

excellent vibration reduction

Easy-to-hold plastic grip

for efficient wall chipping

D-type side handle with adjustable

mechanism for 360˚ rotation plus

positioning from front to rear

Internal double-insulation construction

with sturdy aluminum frame

Soft-touch grip

for easier handling

Large trigger switch for

comfortable operation

A highly reliable mechanism for prevention of idle

hammering and shock-absorbing mechanism results

in prolonged service life and comfortable operation.

High chipping and demolishing performance with low vibration and noise level

Self-chiseling (Good feeling)

A very original design

--- 2 ---

4-1. Selling Point Descriptions

4-1-1. High chipping and demolishing performance with low vibration and noise level

Demolition performance is 1.3 to 1.4 times higher than that of similar products thanks to the 12.5 J impact energy

and efficient striking. The chipping performance is 1.3 to 1.4 times higher than that of similar products. Even so,

the Model H 45SR produces equivalent or lower vibration and sound levels than those of similar products.

4-1-2. Self-chiseling (Good feeling)

Thanks to the computer-simulated optimum striking characteristics, the quantity of body jumping is less than that

of the current Model H 41SA and the working tool smoothly penetrates into the workpiece with a light pressing

force. The Model H 45SR realizes quicker self-chiseling with better impact feeling.

4-1-3. Internal double-insulation construction with sturdy aluminum frame

The aluminum die-cast outer frame is very sturdy (highly rigid). In addition, a plastic internal S holder is adopted

to realize double-insulation construction. Thus the housing has greater rigidity and the double-insulated motor

has greater durability. The Model H 45SR is heavy-duty and the service life of the carbon brush is greatly

prolonged (3 times longer than the conventional one) minimizing disconnection of the armature, deviation of the

core and grease leakage.

4-1-4. A highly reliable mechanism for prevention of idle hammering and shock-absorbing mechanism results

in prolonged service life and comfortable operation

Conventional mechanism for prevention of idle hammering is to open and close the air holes according to the

movement of the striker. The Model H 45SR has air holes located at the position unaffected by the rebound of the

striker at no load. The air holes are opened and closed by the movement of sleeve (A) provided around the

cylinder that interlocks with the tool and the second hammer to prevent idle hammering. This mechanisms

securely prevents idle hammering even in wall hammering works or even if a tool that can cause great rebound on

the striker such as a cutter is used. Thanks to the highly reliable mechanism for prevention of idle hammering, the

service life of the Model H 45SR is prolonged and hammering works requiring much attention not to break the

surroundings can be efficiently performed with the Model H 45SR. At the instance of releasing the bull point from

the concrete by moving the main body up, the second hammer contacts hammer holder (A) then the cushion

(damper (A)) provided between hammer holder (A) and the front cover absorbs the striking force of the second

hammer. Thus the Model H 45SR has greater durability than the similar products.

Impact energy

Maximum compressed air force (piston force)

Quantity of body jumping

65% up (7.5 J to 12.5 J)

About 30% down

About 45% down

Ratio of demolished weight

Full-load vibration level

Full-load noise level

No-load noise level

100

118.5

95.7

84.3

119.0

95.7

88.0

121.5

97.0

89.2

HITACHI

H 45SR HITACHI

H 41SA C

dB (VL)

dB (A)

Maker •Model

--- 3 ---

4-1-5. D-type side handle with adjustable mechanism for 360˚ rotation plus positioning from front to rear

The D-type side handle can be adjusted by 360˚rotation and also allows convenient operation from front to rear.

This side handle has a two-layer plastic construction (integral molding) made of nylon resin as the base and soft

resin around it for a comfortable cushion grip.

4-1-6. Soft-touch grip for easier handling

The double-layer molded handle consists of a nylon resin base covered with a soft plastic layer to ensure a soft

touch and firm, non-slip grip of the handles.

4-1-7. Easy-to-hold plastic grip for efficient wall chipping

The tool retainer is equipped with a small-diameter (50 mm) nylon resin grip. The easy-to-grip tool retainer does

not get hot and the working tool can be easily positioned on the workpiece for the works such as wall chipping.

Thus the Model H 45SR offers excellent workability.

4-1-8. Original design vibration-absorbing handle (Vibration-absorbing is significantly improved)

Hitachi's original design vibration-absorbing handle minimizes vibration through the rolling and compression of

four cylindrical rubber cushions on inclined surfaces. The spring constant factor is as low as that of the Models

H 45SB2, H 41SC, H 45MR, H 60KA, H 60MA and H 60MB, and the cushioning structure greatly reduces vibration.

Full-load current

Power input

Striking speed

Power source

Voltage

Motor type

Insulation structure

5. SPECIFICATIONS

Single-phase AC 50/60 Hz

110 V, 220 V, 230 V, 240 V

AC single-phase series commutator motor

Double insulation

Materials: Aluminum alloy die casting

Nylon resin (Handle, tail cover and crank cover)

Paint : Silver green metallic, black

Trigger switch (with stopper)

D-shaped handle and side handle

Product : 5.9 kg (13.0 lbs.); excluding cord and side handle

Packed : 10.2 kg (22.5 lbs.)

Corrugated cardboard box with plastic tool case

Bull point 280 mm (11-1/32") ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Side handle •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Hex. bar wrench (for M6) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Hex. bar wrench (for M5) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Hex. bar wrench (for M4) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Plastic tool case •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 pc.

Enclosure

Switch

Type of handles

For Europe, Australia, Korea

4.6 A (220 V), 4.4 A (230 V),

4.2 A (240 V)

For Asia, etc.

10.0 A (110 V), 5.0 A (220 V),

4.8 A (230 V)

950 W 1,050 W

No-load : 4,000 min-1

Full-load : 3,000 min-1

Weight

Packaging

Standard accessories

--- 4 ---

5-1. Optional Accessories

(1) Bull point Hexagonal shank bull point Round shank bull point

(2) Cutting, peeling, grooving and edging work (asphalt cutting, etc.)

(1) Cutter

(3) Roughing surface work

(1) Bushing tool

(4) Tamping work

(1) Demolition work

Code No.

980752

980753

Overall length

280 mm (11-1/32")

450 mm (17-23/32")

Code No.

981922

981923

Overall length

280 mm (11-1/32")

450 mm (17-23/32")

Code No.

981924

982705

Code No.

955183

Code No.

955186

982710 (Common use with bushing tool)

(2) Shank

(1) Rammer

Code No.

955181

Code No.

955186

982710 (Common use with rammer tool)

(2) Shank

O.D. 140 mm dia. (5-33/64")

(5) Digging work (Substitute pick-ax)

(1) Scoop

Code No.

956126

982711

--- 5 ---

(Note)

Code numbers listed above are subject to change without notice.

Please refer to periodic Technical News Bulletins.

(9) Grease for impact drill

500 g Can 30 g Tube

70 g Tube

Code No. 308471

Code No. 980927

(6) Self-drilling anchor setting work

(1) Anchor adaptor (for impact)

(7) Syringe (for chip removal)

(1) Earth adaptor

(2) Turning handle

Code No. 944573

(3) Drift key

Code No. 944574

Code No. 981840

Code No. 318085

(8) Ground bar driving work

Code No. 980696

Code No. 991342

Code No. 991343

Code No. 991344

Size No.

No. 30

No. 40

N. 50

Code No.

981929

982702

981930

982703

981931

982704

Anchor size

W3/8

W1/2

W5/8

--- 6 ---

min-1

dB(VL)

dB(A)

6. COMPARISONS WITH SIMILAR PRODUCTS

6-1. Specification Comparison

Maker

Model name

Power input

Striking energy per stroke

Full-load impact rate

Full-load vibration level

Full-load noise level

No-load noise level

Dimensions

Double insulation

HITACHI

H 45SR H 41SA

Weight (without cord and

side handle)

6-2. Demolition Performance Comparison

The data shown in Fig. 1 are obtained in actual factory tests, and are for reference only. Demolished amount may

vary in accordance with operating conditions, operator skill, etc.

Demolished amount

(kg/30 min.)

At rated

voltage 60

Demolished weight

for 30 min. (kg)

H 45SR

H 41SA

Insulation structure

Length

Height

Width

Double insulation Double insulation

5.9

(13.0 lbs.)

454

(17-7/8")

3,000

12.5

118.5

95.7

84.3

106

(4-11/64")

230

(9-1/16")

4.8

(10.6 lbs.)

386

(15-3/16")

3,000

7.5

119.0

95.7

88.0

106

(4-11/64")

210

(8-9/32")

5.3

(11.6 lbs.)

410

(16-9/64")

2,900

8.53

121.5

97.0

89.2

100

(3-15/16")

230

(9-1/16")

Fig. 1

950

For Europe,

Australia,

Korea

For

Asia

etc.

1,050 810

For

Europe,

Australia

For

Southeast

Asia

1,050 900

For

Europe,

Australia

For

Southeast

Asia

1,050

--- 7 ---

H 45SR H 41SA

150

100

1.0

125

0.54

1.00

100

1.20

6-3. Full-load Vibration Level Comparison

The graph shown in Fig. 2 illustrates the relationship between handle pressing force and handle vibration level in

the Z direction.

Fig. 2

6-4. Quantity of Working Tool Penetration and Quantity of Body Jumping

The graph shown in Fig. 3 illustrates the relationship between ratio of

quantity of working tool penetration and ratio of quantity of body jumping.

The quantity of body jumping is less than the similar products and the working

tool quickly penetrates into the workpiece.

Pressing force: 100 N

Fig. 3

Ratio of quantity of

working tool penetration Ratio of quantity of

body jumping

HITACHI H 45SR

HITACHI H 41SA

100 150 200 250

Normal pressing force range

Pressing force (load) (N)

114.0

116.0

118.0

120.0

122.0

124.0

126.0

Vibration level (dB (VL))

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