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(b) A drill can snap sometimes when drilling is
almost finished. It is important to relax your
thrusting pressure when drilling is nearing the
end.
HOW TO USE THE CORE BIT
When boring penetrating large hole use the core bit. At
that time use with the center pin and the core bit shank
provided as optional accessories.
1. Mounting
CAUTION:
Be sure to turn power OFF and disconnect the plug
from the receptacle.
(1) Mount the core bit to the core bit shank. (Fig. 15)
Lubricate the thread of the core bit shank to
facilitate disassembly.
(2) Mount the core bit shank to the Rotary Hammer.
(Fig. 16)
(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. 17)
Fig. 15
Core bit
Core bit shank
Fig. 16
2. How to bore (Fig. 18)
(1) Connect the plug to the receptacle.
(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.
CAUTION:
When removing the center pin and the guide plate,
turn OFF the switch and disconnect the plug from
the receptacle.
3. Dismounting (Fig. 19)
Remove the core bit shank from the rotary hammer
and strike the head of the core bit shank strongly
two or three times with a manual hammer holding
the core bit, then the thread becomes loose and
the core bit can be removed.
Fig. 17
Center pin
Core bit
Core bit tip
Guide plate
Fig. 18
Core bit
shank
Fig. 19
01Eng_DH50MRY_US 8/6/07, 17:1111