Selling Point Descriptions - Hitachi H 45MRY Technical Data And Service Manual

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.
Full-load vibration level (Tri-axial)
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.
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
Maximum compressed air force (piston force)
Quantity of body jumping
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.
Maker . Model HITACHI
H 45MRY
2 7.7
m/sec
min
202.4
Maker . Model
HITACHI
H 45MRY
100
%
m/sec 2
7.7
dB
99
HITACHI
H 45MR
14.2
59.5
HITACHI
H 45MR
84
14.2
101
About 20% up
About 32% down
About 24% down
--- 3 ---
C B
14.0 19.2
61.2 32.6
C
B
87 86
14.0 19.2
103 101