Craftsman 10137 - 1/2 in. Corded Hammer Drill Operator's Manual page 13

A
WARNING: Before connecting the hammer drill to
a power supply source, always check to be sure it
is not in lock-on position (depress and release the
variable speed switch). Failure to ensure that it is not
locked-on could result in accidental starting of the
drill resulting in possible serious injury. Do not lock
the variable speed switch in applications where the
drill may need to be suddenly stopped.
DRILLING
See Figures 7 - 8.
Levels are located on the top and end of the motor hous-
ing to help keep the drill bit level during use.
[] Depress and release the variable speed switch to be
sure the drill is in the OFF position before connecting it
to a power supply.
[] Check the direction of rotation selector for the correct
setting (forward or reverse).
[] Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit rotates.
[] Plug the hammer drill into power supply. Hold the drill
firmly and place the bit at the point to be drilled.
[] Depress the variable speed switch to start the drill. Do
not lock the variable speed switch ON for applications
where the drill may need to be stopped suddenly.
[] Move the drill bit into the workpiece, applying only
enough pressure to keep the bit cutting. Do not force
the drill or apply side pressure to elongate a hole. Let
the tool do the work.
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WARNING: Be prepared for binding at bit break-
through. When these situations occur, the drill has
a tendency to grab and kick in the opposite direc-
tion and could cause loss of control when break-
ing through material. This loss of control can result
in possible serious injury. Do not lock the variable
speed switch ON in applications where the drill may
need to be stopped suddenly.
[] When drilling hard, smooth surfaces, use a center
punch to mark the desired hole location. This will pre-
vent the drill bit from slipping off-center as the hole is
started.
[] When drilling metals, use a light oil on the drill bit to
keep it from overheating. The oil will prolong the life of
the bit and increase the drilling action.
[] If the bit jams in the workpiece or if the drill stalls,
stop the tool immediately. Remove the bit from the
workpiece and determine the reason for jamming.
END ViEW
Fig. 7
WOOD DRILLING
[] For maximum performance, use high speed steel bits
for wood drilling.
[] Select normal drilling mode.
[] Begin drilling at a very low speed to prevent the bit
from slipping off the starting point. Increase the speed
as the drill bit bites into the material.
[] When drilling through holes, place a block of wood
behind the workpiece to prevent ragged or splintered
edges on the back side of the hole.
[] Do not lock the variable speed switch ON for applica-
tions where the drill may need to be stopped suddenly.
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