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OPERATION
Bracing for forward rotation
When drilling in forward, the bit will rotate in a clockwise direction. If the
bit binds in the hole, the bit will come to a sudden stop and drill will
suddenly react in a counterclockwise direction.
Figures 4 and 5 show examples of a Hole Hawg® properly braced for
forward rotation.
A. Forward (clockwise) rotation
B. Reaction
C. Brace drill with pipe handle here
D. Brace drill with motor housing here
If the bit binds, the pipe handle or the motor housing braced against the
stud will hold the drill in position.
B
A
C
D
A
B
Bit binding (Fig. 3)
If the bit binds, the drill will suddenly react in the opposite direction of the
rotation of the bit. Figure 3 shows the path of reaction (B) if the drill bit
binds while being driven in forward (A). The operator should reduce the
chances of a sudden reaction by following the instructions listed below.
The operator should also prepare for a sudden reaction by holding se-
curely using the pipe handle or bracing against a solid fixed object.
To reduce the chance of bit binding
Use sharp bits. Sharp bits are less likely to bind when drilling.
Use the proper bit for the job. There are many types of bits designed
for specific purposes.
Use the proper speed for the size bit. Larger bits should be run at
the lower speed. Driving larger bits at high speeds will increase the
chance of the bit binding and increase the chance of reaction.
Avoid drilling warped, wet, knotty, and or pitchy material if possible.
Avoid drilling in material that you suspect contains hidden nails or
other things that may cause the bit to bind.
The direction of reaction is always opposite of the direction of bit rotation.
Reaction is even more likely to occur when enlarging already existing
holes and at the point when the bit breaks through the other side of the
material.
B
A
Fig. 5
Fig. 4
Fig. 3
WARNING!
When drilling with a single speed drill or in HI with a two speed
drill, always hold the drill securely using the pipe handle, or
brace the drill against a solid fixed object in preparation for
a sudden reaction. When drilling in LO with a two speed drill,
always brace the drill against a solid fixed object in prepara-
tion for a sudden reaction.
When drilling, never use your body to brace drill.
Never put your hands (or other body parts) between the part
of the drill being braced and the object it is being braced
against. Hands (or other body parts) that are in the path of the
reaction can be pinched, crushed and broken.
WARNING!
To reduce the risk of injury, wear safety goggles or glasses
with side shields. Unplug the tool before changing accesso-
ries or making adjustments.
WARNING!
To reduce the risk of personal injury when drilling, always
hold tool by the insulated gripping surfaces when perform-
ing an operation where the cutting tool may contact hidden
wiring or its own cord. Contact with a "live" wire will make
exposed metal parts of the tool "live" and shock the operator.