HITACHI Power Tools Europe GmbH

HITACHI Power Tools Europe GmbH
MODEL
H 45MRY
Hitachi
Power Tools
DEMOLITION HAMMER
H 45MRY
LIST No.: E495
TECHNICAL DATA
AND
SERVICE MANUAL
Oct. 2006
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
H
REMARK:
Throughout this TECHNICAL DATA AND SERVICE MANUAL, symbols are
used in the place of company names and model names of our
competitors. The symbols utilized here are as follows:
Competitors
Symbols Utilized
Company Name
Model Name
C
MAKITA
HM0860C
B
BOSCH
GSH5E
1. PRODUCT NAME
Hitachi Demolition Hammer, Model H 45MRY
2. MARKETING OBJECTIVE
The Model H 45MRY is an upgraded version of the current Model H 45MR that features the use of maker B's
SDS-max shank tools. The performance, durability and operability are greatly improved. In addition, the vibration
level of the Model H 45MRY is low enough to meet the requirements of the EU Physical Agents (Vibration)
Directive that requires employers to take action to reduce exposure of workers to vibration below the exposure
limit values (enforced in July 2005).
The main features of the Model H 45MRY are as follows:
(1) Lowest vibration level in the class thanks to the dynamic damper with a leaf spring and the new vibrationabsorbing handle
(2) High chipping and demolishing performance with low vibration and noise level
(3) Self-chiseling (Good feeling)
(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 360û rotation plus positioning from front to rear
(6) Soft-touch grip for easier handling
(7) Simply turning method, variable lock mechanism for easy working-angle adjustment of chisels etc.
3. APPLICATIONS
Demolishing and chiseling of concrete
Edging, gravel road digging, compacting and tamping, grooving, cutting, stripping and roughing, etc.
--- 1 ---
4. SELLING POINTS
Lowest vibration level in the class
High chipping and demolishing performance with low vibration and noise level
Self-chiseling (Good feeling)
A highly reliable mechanism for prevention of idle
hammering and shock-absorbing mechanism results
in prolonged service life and comfortable operation.
Newly designed vibrationabsorbing handle
Simply turning method, variable lock mechanism
for easy working-angle adjustment of chisels etc.
Large trigger switch for
comfortable operation
Soft-touch grip for
easier handling
D-type side handle with adjustable mechanism for
360û rotation plus positioning from front to rear
Vibration reduction mechanism
--- 2 ---
4-1. Selling Point Descriptions
4-1-1. Lowest vibration level in the class
The vibration level of the Model H 45MRY is about 50% to 60% lower than the similar products. It is the lowest
vibration level in the class. Therefore, the vibration exposure limit time defined by the EU Physical Agents
(Vibration) Directive is longest in the class.
Maker . Model
Full-load vibration level (Tri-axial)
HITACHI
H 45MRY
HITACHI
H 45MR
C
B
m/sec2
7.7
14.2
14.0
19.2
min
202.4
59.5
61.2
32.6
Vibration exposure limit
4-1-2. High chipping and demolishing performance with low vibration and noise level
The hammering energy is transmitted more efficiently while the vibration level and the full-load noise level are
lowest in the class. The demolishing performance is about 1.2 times higher than the similar products.
Maker . Model
HITACHI
H 45MRY
HITACHI
H 45MR
C
B
%
100
84
87
86
m/sec2
7.7
14.2
14.0
19.2
dB
99
101
103
101
Ratio of demolished weight
Full-load vibration level (Tri-axial)
Full-load noise level
4-1-3. Self-chiseling (Good feeling)
Thanks to the computer-simulated optimum hammering characteristics, the quantity of body jumping is less than
that of the current Model H 45MR, and the working tool smoothly penetrates into the workpiece with a light
pressing force. The Model H 45MRY realizes quicker self-chiseling with better feeling.
Demolished amount
About 20% up
Maximum compressed air force (piston force)
About 32% down
Quantity of body jumping
About 24% down
4-1-4. Vibration reduction mechanism
The Model H 45MRY is equipped with Hitachi's own dynamic damper that absorbs vibration from the main body
by means of resonance of a leaf spring and a spindle. As a result, the vibration level of the Model H 45MRY is
remarkably lower than the current Model H 45MR.
4-1-5. Newly designed vibration-absorbing handle
The Model H 45MRY is equipped with the new vibration-absorbing mechanism based on the same Hitachi's own
vibration-absorbing mechanism as the current Model H 45MR that absorbs vibration by rolling and compressing
the four cylindrical rubber cushions on the inclined surface. In the new vibration-absorbing mechanism, the shaft
fixed to the handle is turned in conjunction with the handle movement and the four cylindrical rubber cushions are
rolled and compressed to absorb vibration more efficiently. The cushion effect not only greatly reduces vibration
but also maintains good operability.
--- 3 ---
4-1-6. A highly reliable mechanism for prevention of idle hammering and shock-absorbing mechanism results in
prolonged service life and comfortable operation
The Model H 45MRY 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 the slide sleeve provided around the cylinder that interlocks
with the tool and the second hammer to prevent idle hammering. This mechanism 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 45MRY is prolonged and hammering works requiring much attention not to break the surroundings can
be efficiently performed with the Model H 45MRY.
At the moment of releasing the bull point from the concrete by moving the main body up, the second hammer
contacts hammer holder (A) and the cushion (damper (A)) provided between hammer holder (A) and the front
cover absorbs the hammering force of the second hammer. Thus the Model H 45MRY has greater durability than
the similar products.
4-1-7. D-type side handle with adjustable mechanism for 360û rotation plus positioning from front to rear
The D-type side handle can be adjusted by 360û 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.
4-1-8. 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.
4-1-9. Simply turning method, variable lock mechanism for easy working-angle adjustment of chisels, etc.
The tool swivel angle can be easily changed in 12 steps by pushing out grip (B) ahead and then turning grip (A).
--- 4 ---
5. SPECIFICATIONS
Power source
Single-phase AC 50/60 Hz
Voltage
110 V, 230 V
Motor type
AC single-phase series commutator motor
Insulation structure
Double insulation
Enclosure
Materials: Aluminum alloy die casting (Cylinder crank case)
Nylon resin (Handle, tail cover, back cover, hood, crank cover)
Polycarbonate resin (Housing)
Paint: Green, gunmetallic silver, black, silver
Switch
Trigger switch (with stopper)
Type of handles
D-shaped handle and side handle
Full-load current
9.1A (110 V), 4.4 A (230 V)
Power input
950 W
Striking speed
No-load: 4,000 min-1
Full-load: 3,000 min-1
Weight
Product: 5.9 kg (13.0 lbs.); Excluding cord and side handle
Packed: 12.4 kg (27.3 lbs.)
Packaging
Standard accessories
Corrugated cardboard box with plastic tool case
Bull point 280 mm (11-1/32")
Side handle
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
Plastic tool case
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
--- 5 ---
1 pc.
1 pc.
1 pc.
5-1. Optional Accessories
(1) Demolishing work
+
(1) Bull point (SDS-max shank type)
Overall length
Code No.
280 mm (11-1/32")
313471
400 mm (15-3/4")
313472
(2) Grooving and chiseling work
+
(1) Cold chisel (SDS-max shank type)
Overall length
Code No.
280 mm (11-1/32")
313473
400 mm (15-3/4")
313474
(3) Cutting and stripping work (Asphalt cutting etc.)
+
(1) Cutter (SDS-max shank type)
Width
50 mm (2")
Overall length
400 mm (15-3/4")
--- 6 ---
Code No.
313475
(4) Digging (Substitute pick-ax)
+
(1) Scoop (SDS-max shank type)
Overall length
Code No.
400 mm (15-3/4")
313476
(5) Roughing surface work
+
+
(1) Bushing tool
(2) Shank (SDS-max shank type)
Code No.
Overall length
Code No.
313477
220 mm (8-21/32")
313479
(6) Tamping work
+
(1) Rammer
+
(2) Shank (SDS-max shank type)
Code No.
Overall length
Code No.
313478
220 mm (8-21/32")
313479
150 mm x 150 mm
--- 7 ---
(7) Grease for hammer and hammer drill
500 g (1.1 lbs.) Can
70 g (2.5 oz) Tube
30 g (1 oz) Tube
Code No. 980927
Code No. 308471
Code No. 981840
NOTE: Code numbers listed above are subject to change without notice. Please refer to periodic
Technical News Bulletins.
--- 8 ---
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparison
HITACHI
Maker
Model name
H 45MRY
H 45MR
C
B
Power input
W
950
950
1,100
1,100
Striking energy per stroke
J
12.7
12.5
1.8 to 12.0
2.0 to 12.0
3,000
3,000
m/sec
7.7
14.2
14.0
19.2
min
202.4
59.5
61.2
32.6
dB
99
475
(18-45/64")
230
(9-1/6")
104
(4-3/32")
5.9
(13.0 lbs.)
Double
insulation
101
454
(17-7/8")
230
(9-1/16")
106
(4-11/64")
5.9
(13.0 lbs.)
Double
insulation
103
454
(17-7/8")
223
(8-25/32")
99
(3-57/64")
4.7
(10.4 lbs.)
Double
insulation
101
min-1
Full-load impact rate
Full-load vibration level (Tri-axial)
2
Vibration exposure limit
Full-load noise level
Dimensions
Length
mm
Height
mm
Width
mm
Weight (without cord and side handle)
kg
Insulation structure
1,100 to 2,650 1,300 to 3,000
450
(17-23/32")
230
(9-1/16")
102
(4-1/64")
5.5
(12.1 lbs.)
Double
insulation
Vibration reduction mechanism
Vibration-absorbing 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.)
0
40
20
Demolished weight
for 30 min. (kg)
H 45MRY
H 45MR
78.0
65.6
At rated
voltage
C
67.8
B
67.4
Fig. 1
--- 9 ---
100
80
60
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