Craftsman 315.101360 - Manual (Page 11)

OPERATION
DRILLING
See Figure 11.
■ Depress and release 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 (fonward or reverse). See Figure 3.
■ Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit rotates,
■ Plug your hammer drill into power supply source.
■ Hold your drill firmly and place bit at 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 drill bit into the workpiece applying only
enough pressure to keep the bit cutting. Do not force
your drill or apply side pressure to elongate a hole.
Let your drill and bit do the work. See Figure 11.
A WARNING: Be prepared for binding or break­
through. When these situations occur, 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
trigger on jobs where your drill may need to be
stopped suddenly.
When drilling hard, smooth surfaces use a center punch
to mark the desired hole location. This will prevent the
drill bit from slipping off center as the hole is started.
When driiiing 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 driiiing action.
If the bit jams in the workpiece or if your drill stalls, stop
the tool Immediately. Remove the bit from the workpiece
and determine the reason for jamming.
WOOD DRILLING
■ For maximum performance use high speed steel bits
for wood drilling.
■ Slide adjustment button on hammer drill down for
normal drilling action.
■ 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 trigger ON for jobs where your
hammer drill may need to be stopped suddenly,
METAL DRILLING
■ For maximum performance use high speed steel bits
for metal or steel drilling.
Page
■ Slide adjustment button on hammer drill down for
normal drilling action (drill mode).
■ Begin drilling at a very low speed to prevent the bit
from slipping off the starting point,
■ Maintain a speed and pressure which allows cutting
without overheating the bit. Applying too much
pressure will:
Overheat the drill;
Wear the bearings;
Bend or burn bits; and
Produce off-center or irregular shaped holes.
■ When drilling large holes in metal, we recommend
that you drill with a small bit first, then finish with a
larger bit. Also, lubricate the bit with oil to improve
drilling action and increase bit life.
MASONRY DRILLING
■ For maximum performance use carbide-tipped
masonry impact bits when drilling holes in brick, tile,
concrete, etc,
■ Slide adjustment button on hammer drill up for
hammer mode.
■ Apply light pressure and medium speed for best
results in brick.
■ Apply additional pressure for hard materials such as
concrete.
■ When drilling holes in tile, practice on a scrap piece
to determine the best speed and pressure.
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