Hitachi DH 28PD Mode D'emploi Et Instructions De Securite page 15

Core bit
Core bit shank
(2) Mount the core bit shank to the rotary hammer. (Fig.
27)
(3) Insert the center pin into the guide plate until it
stops.
(4) Engage the guide plate with the core bit, and turn
the guide plate to left or right so that it does not fall
even if it faces downward. (Fig. 28)
Guide plate
Center pin
Core bit tip
Core bit
2. How to bore (Fig. 29)
(1) Connect the plug to the power source.
(2) A spring is installed in the center pin. Push it lightly
to the wall or the floor straight. Connect all over
the surface of the core bit tip and start operating.
(3) When boring about 3/16" (5 mm) in depth the
position of the hole will establish. Bore after that
removing the center pin and the guide plate from
core bit.
(4) Application of excessive force will not only expedite
the work, but will deteriorate the tip edge of the
drill bit, resulting in reduced service life of the rotary
hammer.
Thread
Fig. 26
Fig. 27
Fig. 28
CAUTION:
When removing the center pin and the guide plate,
turn OFF the switch and disconnect the plug form
the receptacle.
3. Dismounting. (Fig. 30)
Remove the core bit shank from the
rotary hammer and strike the head of the core bit
shank strongly two or three times with the hammer
holding the core bit, then the thread becomes loose
and the core bit can be removed.
Core bit shank
English
Fig. 29
Fig. 30
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