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14
(2) Mount the core bit shank on the main body in
the same manner as in mounting the drill bit
and the bull point. (Fig. 13)
(3) Insert the center pin into the guide plate until
it reaches the extremity.
(4) Fit in the guide plate by aligning its concaved
portion with the core bit tip. When the position
of the concave is shifted by turning the guide
plate right or left, the guide plate never slips
off even when the rotary hammer is used in a
downward direction. (Fig. 14)
2. Drilling holes
(1) Insert the plug into a power supply receptacle.
(2) A spring is built in the center pin. By straightly
and gently pressing it to the wall or floor
surface, the entire surface of the core bit tip
attains contact to start the hole drilling job. (Fig.
15)
(3) When the hole depth reaches approximately
3/16" (5 mm), the hole position can be
determined. Then remove the center pin and
guide plate from the core bit and continue the
hole drilling job.
CAUTION:
When removing the center pin and guide plate,
always disconnect the plug from the power
supply receptacle.
3. How to dismount the core bit (Fig. 16)
(1) By holding the rotary hammer (with the core
bit inserted) in an upward position, drive the
rotary hammer to repeat impact operation two
or three times, whereby the screw is loosened
and the rotary hammer becomes ready for
disassembly.
(2) Remove the core bit shank from the rotary
hammer, hold the core bit with one hand, and
strongly strike the head of the hexagonal
portion of the core bit shank with a hand
hammer two or three times, whereby the round
head screw is loosened and the rotary hammer
is ready for disassembly.
Fig. 13
Fig. 14
Guide
plate
Center pin
Core bit
Core
bit tip
Fig. 15
Fig. 16
Core bit
Core bit
shank
01Eng_DH50SB_US 25/5/07, 17:0014