Hitachi DH 40FB - Manual (Page 14)

14
English
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. 13)
Lubricate the thread of the core bit
shank to facilitate disassembly.
(2) Mount the core bit shank to the rotary
hammer. (Fig. 14)
(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. 15)
2. How to bore (Fig. 16)
(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.
Fig. 13
Core Bit
Core Bit
Shank
Fig. 14
Fig. 15
Center Pin
Core Bit
Core Bit Tip
Guide Plate
Fig. 16