page 6
APPLICATIONS
Using rotary percussion core bits (Fig. 6, 7 & 8)
Core bits are useful for drilling large holes for conduit and pipe.
MILWAUKEE Heavy-Duty Thin Wall Core Bits have heat treated steel
bodies with durable carbide tips. They are specially designed for fast,
accurate drilling with combined hammering and rotary action.
1.
Clean and lubricate the threads on the adapter and core bit as
shown (Fig. 6) to make later removal easier. Screw the threaded
end of the adapter into the rear of the core bit.
2.
Push the guide plate onto the pointed end of the center pin. Insert the
center pin and guide plate assembly into the core bit. Be sure the
small end of the center pin is securely placed into the hole in the
center of the core bit.
3.
Insert the adapter into the nose of the tool as described in the
section “Installing Bits”. Set the rotary hammer/drill lever to rotary
hammer.
4.
Press the center pin firmly against your center mark, hold the tool
firmly and pull the trigger.
NOTE:
Center pins and guide pins are not required for 1" and 1-1/8"
core bits. To make starting these bits easier, use a template or notched
board.
5.
After drilling to about the depth of the core bit teeth, remove the
center pin and guide plate from the core bit (Fig. 7). Then resume
drilling.
To reduce the risk of personal injury, hold the tool
securely (Fig. 9, 10 & 11). Brace tools with side handles.
If the bit binds, the tool will be forced in the
opposite direction. Bits may bind if they are
misaligned or when breaking through a hole.
WARNING!
reaction
forward
rotation
reverse
rotation
bracing against a stud
reaction
Fig. 9
bracing against your leg
forward
rotation
Fig. 10
reaction
bracing against the floor
reaction
forward
rotation
Fig. 11
Fig. 6
Fig. 7
Fig. 8
6.
After you have finished drilling the hole, hold the tool upwards,
pointing it away from your body as shown (Fig. 8), and run it briefly
in forward to loosen the core bit from the adapter.
NOTE:
MILWAUKEE Heavy-Duty Thin Wall Core Bits drill holes up to
3" deep. To make deeper holes, remove the bit, break and remove
the core. Then resume drilling.
Adapter
Clean and lubricate threads
Core bit
Center pin
Guide plate
