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HOW TO HANDLE A CORE BIT
When a core bit is used, large diameter holes and blind holes can be drilled. In this case, use
optional accessories for core bits (such as a center pin and core bit shank) for more effi cient
operation.
1.
Mounting
CAUTION
Prior to mounting a core bit, always disconnect
the plug from the power supply receptacle.
(1)
Mount the core bit on the core bit shank. (Fig. 13)
Before that, feed oil to the screw portion of core bit
shank for easy dismounting.
(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. 14)
(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 drill is used
in a downward direction. (Fig. 15)
2.
Drilling holes
(1)
Insert the plug into a receptacle.
(2)
A spring is built in the center pin. By straightly and
gently pressing it to the wall or fl oor surface, the entire
surface of the core bit tip attains contact to start the hole
drilling job. (Fig. 16)
(3)
When the hole depth reaches approximately 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 receptacle.
3.
How to dismount the core bit
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 manual hammer two or three times, whereby the
round head screw is loosened and the rotary hammer is
ready for disassembly. (Fig. 17)
Core bit
Center pin
Core bit
Core bit shank
25
English
Core bit
shank
Fig. 13
Fig. 14
Guide plate
Core bit tip
Fig. 15
Fig. 16
Core bit
Fig. 17
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