Tool Retainer Section - Hitachi DH 14DL Technical Data And Service Manual

Fig. 3
Rotation
Rotation
a : b = 1:2
25°
30°
Section A-B
A
B
130°

6. Tool retainer section

The tool retainer is structured as shown in Fig. 4.
The tip of the tool retainer is covered with the front cap (made of rubber) to prevent dust and chips from
getting inside. The steel ball falls into the round groove of the bit to prevent the tool from coming off and the
two key rails transmit the rotation torque. To mount the bit, push the bit in the tool retainer as far as it will go.
Pushing lightly, turn the bit until it is caught. At this position, push the bit in as far as it will go (sliding the grip
is not required for mounting the bit). To remove the bit, slide the grip backward to the full and remove the
bit.
Fig. 4
Grip
Ball holder
Holder spring
Steel ball
Front cap
Stopper ring
Cylinder
Key rail (2 pcs.)
Holder plate
17