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Craftsman 315.277180 Owner's Manual page 12

Adjustable variable speed - reversible double insulated 3/8 in. professional hammer drill

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DRILLING
See Figure 11.
j
Fig. 11
Depress and release the switch trigger to be sure
your drill is in off position before connecting it to
power supply.
Check the direction of rotation lever for correct
setting (forward or reveme). See Figure 3.
Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drillbit
rotates.
Plug your drill into power supply source.
Hold your drill firmly and place the bit at the point
to be drilled.
Depress the switch trigger to start your drill. Do not
lock the switch on for jobs where your drill may
need to be stopped suddenly.
Move the drillbit intoworkpiece applying only
enough pressure to keep the bit cutting. Do not
force your drill or apply side pressum to elongate a
hole. Let your drill and bit do the work.
When drilling hard smooth surfaces use a center
punch to mark desired hole location. This will prevent
the drill bit from slipping off center as the hole is
started. However, the variable speed feature allows
starting holes without center punching if desired. To
accomplish this, simply operate your drill at a low
speed until the hole is started.
,_
WARNING:
Be prepared for binding or bit
breakthrough. When these situations occur, drill
has a tendency to grab and kick opposite to the
direction of rotation and could cause loss of
control when breaking through material. If not
prepared, this loss of control can result in
possible serious injury.
When drilling metals, use a light oil on the drill bit to
keep it from overheating. The oil will prolongthe life of
the bit and increase the drilling action.
If the bit jams in workpiece or if the drill stalls, stop the
tool immediately. Remove the bit from the workpiece
and determine the mason for jamming.
12

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