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DRiLLiNG
See Figures 14- 15.
[] Depress and release the switch trigger to be sure the
drill is in the OFF position before connecting it to power
supply.
[] Check the direction of rotation selector for 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 drill into power supply source.
[] Hold the drill firmly and place the bit at the point to be
drilled.
[] Depress the switch trigger to start the drill. Do not lock
the switch ON for jobs 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 drill and bit do the work.
LEVELS
Fig. 14
,_
WARNING"
Be prepared for binding at 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 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 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.
LEVELS
LEVEL
Fig. 15
17
WOOD
DRILLING
For maximum performance,
use high speed steel bits for
wood drilling.
[] 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.
METAL DRILLING
For maximum performance,
use high speed steel bits for
metal or steel drilling.
[] 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, start with a small bit,
then finish with a larger bit. Also, lubricate the bit with
oil to improve drilling action and increase bit life.
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