Using Rotary Percussion Core Bits
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
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. Fig. 7
3. Insert the adapter into the nose of the tool as described on
page 1
. Set the stop rotation knob to hammering with rotation.
4. Press the center pin firmly against your center mark,
hold the tool firmly and pull the trigger. Fig. 8
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 tem-
plate or notched board as shown. Fig. 9
5. After drilling to about the depth of the core bit teeth,
remove the center pin and guide plate from the core bit. Then
resume drilling.
6. After you have finished drilling the hole, hold the tool
upwards, pointing it away from your body as shown, and run
it briefly to loosen the core bit from the adapter. Fig. 10
MILWAUKEE Heavy-Duty Thin Wall Core Bits drill holes up
to 3” deep. Thick Wall Core Bits drill holes up to 4 3/8” deep.
To make deeper holes, remove the bit, break and remove the
core. Then resume drilling.
Chiseling & Chipping
MILWAUKEE 1-1 /2” Heavy Duty Rotary Hammers may be
used for light chipping and chiseling. A variety of accessories
are available.
Bushing Tools
Used to surface concrete.
Mortar Cutting Chisels
For removing old mortar for tuck pointing or caulking.
Operating Instructions (continued)
Page 3
RenTrain INC
RenTrain INC
Fig. 7
Fig. 10
Fig. 8
Fig. 9
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