Hitachi DH 40MR User manual

POWER TOOLS

TECHNICAL DATA

AND

SERVICE MANUAL

ROTARY HAMMER

DH 40MR

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST No. E467 Sep. 2002

MODEL

DH 40MR

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

BOSCH GBH5-40DE

HILTI TE55

MAKITA HR4000C

Page

CONTENTS

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. Specifications................................................................................................................................. 3

5-2. Optional Accessories ..................................................................................................................... 4

6. COMPARISONS WITH SIMILAR PRODUCTS ..............................................................................8

6-1. Specification Comparisons ............................................................................................................ 8

6-2. Drilling Speed Comparisons .......................................................................................................... 9

6-3. Chiseling Performance Comparison ............................................................................................ 10

6-4. Comparison of Drilling Speed Change by Pushing Force ........................................................... 10

6-5. Drilling Speed and Quantity of Body Jumping ..............................................................................11

7. PRECAUTIONS IN SALES PROMOTION ...................................................................................11

7-1. Handling Instructions ....................................................................................................................11

7-2. Caution Plate ............................................................................................................................... 12

8. REFERENCE INFORMATION ......................................................................................................12

8-1. Grease Replacement................................................................................................................... 12

8-2. O-Ring Replacement ................................................................................................................... 12

8-3. Structure of DH 40MR Rotary Hammer ....................................................................................... 13

9. REPAIR GUIDE ............................................................................................................................18

9-1. Disassembly ................................................................................................................................ 18

9-2. Reassembly ................................................................................................................................. 20

9-3. Screw Locking Agent TB1401...................................................................................................... 23

9-4. Tightening Torque ........................................................................................................................ 23

9-5. Internal Wiring.............................................................................................................................. 24

9-6. Insulation Tests ............................................................................................................................ 25

9-7. No-load Current Value ................................................................................................................. 25

10. STANDARD REPAIR TIME (UNIT) SCHEDULES .....................................................................26

Assembly Diagram for DH 40MR

--- 1 ---

1. PRODUCT NAME

Hitachi Rotary Hammer, Model DH 40MR

2. MARKETING OBJECTIVE

The Model DH 40MR is an upgraded version of the current Models DH 40MA and DH 40MB, which feature the

use of SDS-max shank tools. The performance, durability and operability are greatly improved. With this

competitive Model DH 40MR, we aim to enhance the share of SDS-max type rotary hammers.

The main specifications are as follows:

(1) High drilling speed with low vibration and noise level

(2) Self-drilling (Good feeling)

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

(4) Constant speed with variable speed control

(5) Soft-touch grip for easier handling

(6) Variabel lock mechanism for easy working-angle adjustment of chisels etc.

(7) Avery original design

3. APPLICATIONS

Drilling holes in concrete and drilling anchor holes

Demolishing and chiseling of concrete. Edging, gravel road digging, compacting and tamping, grooving,

cutting, stripping and roughing, etc.

[Application examples]

Air conditioning Piping and wiring Electric fixtures

Sanitary facilities Interior finishing Other building, construction and repair work

4. SELLING POINTS

Needle-pin type slip clutch

Internal double-insulation construction

with sturdy aluminum frame Constant speed with

variable speed control

Soft-touch grip handle

for easier handling

Soft-touch grip side-handle

for easier handling

High drilling speed with low vibration and noise level

Self-drilling (Good feeling)

A very original design

Change lever for switching between "Rotation +

Hammering" (for drilling), "Neutral" (for positioning

the tool tip) and "Hammering only" (for chiseling

and chipping)

--- 2 ---

4-1. Selling Point Descriptions

4-1-1. High drilling speed with low vibration and noise level

The drilling speed is 10 % faster than that of similar products thanks to efficient striking energy transmission and

speed setting. Even so, the Model DH 40MR produces lower vibration and noise levels than those of similar

products.

Maker •Model

Ratio of drilling speed %

Full-load vibration level dB (VL)

m/s2

HITACHI

DH 40MR

100

116.8

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

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

of the current Model DH 40MA and the working tool smoothly penetrates into the workpiece with a light pressing

force. The Model DH 40MR realizes quicker self-drilling with better impact feeling.

4-1-4. Dial type, constant speed with variable speed control

The Model DH 40MR is equipped with a built-in electronic control circuit

that can adjust the number of hammering steplessly between 1320 and

2650 min-1 with the dial. Even though the load varies, the Model

DH 40MR provides better operability and stable and efficient drilling

performance because the constant speed control minimizes changes in

number of rotation and hammering.

Impact efficiency

Maximum compressed air force (piston force)

Quantity of body jumping

About 10 % up

About 50 % down

About 25 % down

Full-load noise level dB (A)

No-load noise level dB (A)

6.9

92.4

79.5

HITACHI

DH 40MA/MB

118.0

7.9

94.6

89.4

119.8

9.8

93.7

85.0

116.1

6.4

93.2

83.0

118.5

8.4

93.5

80.3

* Ratio of drilling speed: A28-mm dia. drill bit is used.

Full-load vibration and noise levels: A 20-mm dia. drill bit is used.

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

The aluminum die-cast outer frame is very sturdy (same as the Models H 45MR/H 45SR). 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 DH 40MR is heavy-duty and the service life of the

carbon brush is greatly prolonged (1.5 times longer than the conventional one) minimizing disconnection of the

armature, deviation of the core and grease leakage.

4-1-5. 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.

Speed-adjust dial

--- 3 ---

5. SPECIFICATIONS

5-1. Specifications

Capacity

Power source

Current

Power input

Switch

Type of handles

Impact rate

Weight

Packaging

Standard accessories

Drill bit (Max. diameter): 40 mm (1-9/16")

Core bit (Max. diameter): 105 mm (4-1/8")

AC single phase 50 Hz or 60 Hz

950 W

Trigger switch

D-shaped handle and side handle

No load and full load: 1,320 to 2,650 min-1

Product: 6.5 kg (14.3 lbs.); excluding cord and side handle

Packed: 10.0 kg (22.1 lbs.)

Corrugated cardboard box with plastic tool case

•Plastic case •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

•Side handle •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

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

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

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

•Stopper ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

•Grease (A) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

4-1-6. Change lever for switching between "Rotaion + Hammering", "Neutral" and "Hammering only"

The Model DH 40MR provides three functions, "rotation + hammering"

function (for drilling), "neutral" function (for positioning the tool tip) and

"hammering only" function (for chiseling and chipping).

These function modes can be easily switched by using the change lever.

The tool angle can be easily changed in 12 steps by turning the grip

with the change lever positioned at "Neutral".

4-1-7. Needle-pin type slip clutch

The Model DH 40MR is equipped with a needle-pin type slip clutch for higher slip torque accuracy and enhanced

safety (same as the Model DH 40MA).

Voltage 110 V

10 A

120 V

9.2 A 220 V

5 A 230 V

4.8 A 240 V

4.6 A

Enclosure

Motor type AC single-phase series commutator motor

Materials: Aluminum alloy die casting

Nylon resin (Handle, handle cover, tail cover and crank cover)

Paint : Silver green metallic, black

Double insulation

Insulation structure

Rotation rate No load and full load: 240 to 480 min-1

--- 4 ---

5-2. Optional Accessories

1. Drilling work for through-holes (Rotation + Hammering)

(1) Drill bit (taper shank) (2) Taper shank adapter

(SDS max shank)

(3) Cotter

(1) Drill bit (SDS max shank)

Outer diameter

(mm)

16 (5/8")

19 (3/4")

22 (7/8")

25 (1")

28 (1-1/8")

32 (1-1/4")

38 (1-1/2")

40 (1-9/16")

Over length

(mm)

340 (13-3/8")

320 (12-5/8")

370 (14-9/16")

Code No.

313448

313449

313450

313451

313452

313453

313454

313455

Outer diameter

(mm)

16 (5/8")

19 (3/4")

22 (7/8")

25 (1")

28 (1-1/8")

32 (1-1/4")

38 (1-1/2")

40 (1-9/16")

Over length

(mm)

540 (21-1/4")

520 (20-15/32")

570 (22-7/16")

Code No.

313456

313457

313458

313459

313460

313461

313462

313463

2. Drilling work for anchor holes (Rotation + Hammering)

1 Drill bit (Taper shank)

(1) Drill bit (Taper shank)

Outer diameter (mm)

11 (7/16")

12.3 (15/32")

12.7 (1/2")

14.3 (9/16")

14.5 (9/16")

17.5 (11/16")

Code No.

944460

944461

993038

944462

944500

944463

(2) Taper shank adapter

Taper dimension Code No.

Morse taper No. 1 313464

(3) Cotter

Code No.

944477

2 SDS-plus shank bit adapter

(1) Drill bit (SDS-plus shank) (2) SDS-plus shank

bit adapter

(SDS max shank)

Code No. 313465

--- 5 ---

3. Boring work for large-diameter holes (Rotation + Hammering)

(1) Guide plate

(2) Center pin

(3) Core bit (4) Core bit shank

(SDS max shank)

(1) Guide plate

Core bits with outer diameter of 32, 35, 38, 45, 50, 54, 60, 64, 70, 75, 79, 94, 100, 105 mm (1-1/4", 1-3/8",

1-1/2", 1-3/4", 2", 2-1/8", 2-3/8", 2-2/1", 2-3/4", 2-15/16", 3-1/8", 3-1/16", 3-15/16", 4-1/8")

[Guide plate is not used with core bits with outer diameter of 25 mm (1") and 29 mm (1-1/8")]

(2) Center pin

Code No. 956009 for core bits with outer diameter of 32, 35 mm (1-1/4", 1-3/8")

Code No. 955165 for core bits with outer diameter of 38, 45, 50, 54, 60, 64, 70, 75, 79, 94, 100, 105 mm

(1-1/2", 1-3/4", 2", 2-1/8", 2-3/8", 2-1/2", 2-3/4", 2-15/16", 3-1/8", 3-11/16", 3-15/16", 4-1/8")

[Center pin is not used with core bits with outer diameter of 25 mm (1") and 29 mm (1-1/8").]

(3) Core bit

Outer diameter (mm)

25 (1")

29 (1-1/8")

32 (1-1/4")

35 (1-3/8")

38 (1-1/2")

45 (1-3/4")

Code No.

955994

955995

955996

955998

956000

955154

Outer diameter (mm)

50 (2")

54 (2-1/8")

60 (2-3/8")

64 (2-1/2")

70 (2-3/4")

75 (2-15/16")

Code No.

959706

955155

959707

956002

959708

959709

Outer diameter (mm)

79 (3-1/8")

94 (3-11/16")

100 (3-15/16")

105 (4-1/8")

Code No.

955157

956004

959710

955159

4. Hole drilling .................................... For drilling steel and wood

(1) 13 mm drill chuck

(13VLA)

(2) Chuck adapter

(SDS max shank)

(3) Chuck wrench

(1) 13 mm drill chuck (13VLA) (2) Chuck adapter (3) Chuck wrench

Code No. 950272 Code No. 313468 Code No. 930515

(4) Core bit shank (SDS max shank)

Code No. 313466 for core bits with outer diameter of 25, 29, 32, 35 mm (1", 1-1/8", 1-1/4", 1-3/8")

Code No. 313467 for core bits with outer diameter of 38, 45, 50, 54, 60, 64, 70, 75, 79, 94, 100, 105 mm

(1-1/2", 1-3/4", 2", 2-1/8", 2-3/8", 2-1/2", 2-3/4", 2-15/16", 3-1/8", 3-11/16", 3-15/16", 4-1/8")

--- 6 ---

(Socket) (1) Chemical anchor adapter

(SDS max shank)

(1) Bull point (SDS max shank)

12.7 mm (1/2")

19.0 mm (3/4")

Socket square size Code No.

313469

313470

5. Chemical anchor holes drilling work (Rotation + Hammering)

6. Demolition work (Hammering)

280 mm (11")

400 mm (15-3/4")

Overall length Code No.

313471

313472

7. Grooving and edging (Hammering)

(1) Cold chisel (SDS max shank)

280 mm (11")

400 mm (15-3/4")

Overall length Code No.

313473

313474

(1) Cutter (SDS max shank)

400 mm (15-3/4")

Overall length Width

50 mm (2")

8. Cutting and stripping (Asphalt cutting etc.) (Hammering)

Code No.

313475

9. Digging (Substitute pick-ax) (Hammering)

(1) Scoop (SDS max shank)

400 mm (15-3/4")

Overall length Code No.

313476

--- 7 ---

10. Surface roughing work (Hammering)

(1) Bushing tool

(2) Shank (SDS max shank)

220 mm (8-21/32")

Overall length Code No.

313479

313477

Code No.

11. Tamping work (Hammering)

(1) Rammer

(2) Shank (SDS max shank)

220 mm (8-21/32")

Overall length Code No.

313479

313478

150 mm x 150 mm

Code No.

500 g (1.1 lbs.) Can

12. Syringe (for chip removal)

Code No. 944575

Code No. 980927

70 g (2.5 oz) Tube

Code No. 308471

30 g (1 oz) Tube

Code No. 981840

13. Impact drill grease

(Note)

Code numbers listed above are subject to change without noitce. Please refer to periodic Technical News

Bulletins.

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