User's Manual

Site Preparation – continued
DRAFT
SC
TM
4812ET RF and Power Cabinet Hardware Installation Manual
Apr 2001
48
Table 2-8: Drilling Procedure
Step Action
2
Position the end of the drill bit in the center of the first mark on the floor. Stabilize the drill by holding
the drill handle at the 90_ position, refer to Figure 2-1. Rest the drill against your leg while drilling to
counter the drill’s tendency of rotating out of your hand while drilling through reinforcement bars and
stone aggregate.
90 Degree
_
Figure 2-1: Drill Stabilization
PLACE KNEE NEXT TO
DRILL
TO CONTROL ROTATION
POSITION WORK
BOOT NEXT TO BIT
WHEN STARTING TO
PREVENT BIT FROM
WALKING.
POSITION
DRILL BIT IN
CENTER OF
MARK ON
FLOOR
3 Begin to drill in short bursts, keep the drill bit from “walking” by using the side of your work boot to
hold the drill in place until drill “has a bite” in the concrete. Once started, run drill at full speed.
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