Selling Point Descriptions - Hitachi DH 22PG Technical Data And Service Manual

Most compact and lightweight in its class*
The Model DH 22PG is most compact and lightweight in its class thanks to the optimum striking
mechanism.
Maker
Model
Overall
length
Weight
289 mm
Internal pressure adjustment mechanism
An air passage is provided as shown below to let out air inside the gear cover and let outside air in the gear
cover. This passage is sandwiched between felt packings to pass only air. Thus variations in the internal
pressure are minimized for stable hammering operation and prevention of grease leakage.
A - A
(Inside the Gear cover)
Idle striking prevention mechanism
When the drill bit is lifted from the concrete surface, the reciprocating bearing that converts rotation into
reciprocating motion stops to prevent idle striking. Thanks to this mechanism, vibration and noise during
no-load operation are reduced.

SELLING POINT DESCRIPTIONS

HITACHI
DH 22PG
289 mm
1.9 kg
Air passage
(Outside the
gear cover)
Felt packing (B)
Valve
Felt packing (A)
B
342 mm
2.3 kg
Inner cover
-1-
* Based on our own research
C
352 mm
2.3 kg