RIDGID R50111 Operator's Manual page 11

OPERATION
 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 drill into power supply. Hold the drill firmly and
place the bit at the point to be drilled, or where the screw
is to be driven.
 Depress the switch trigger to start the drill.
 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.
WARNING:
Be prepared for binding at bit breakthrough. When
these situations occur, the drill has a tendency to
grab and kick in the opposite direction 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 preent 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.
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WOOD AND METAL DRILLING
For maximum performance, use high speed steel bits for
wood or metal drilling. Select drilling mode. Begin drilling
at a very low speed to prevent the bit from slipping off the
starting point.
Wood Drilling
 Increase the speed as the drill bit bites into the material.
 When drilling through holes, place a block of wood behind
Metal and Steel Drilling
 Use a light oil on the drill bit to keep it from overheating.
 Maintain a speed and pressure which allows cutting
• Produce off-center or irregular-shaped holes.
 When drilling large holes in metal, start with a small bit,
MASONRY DRILLING
For maximum performance, use carbide-tipped masonry
impact bits or designated hammer drill bits when drilling
holes in brick, tile, concrete, etc. Select hammer mode.
 Apply light pressure at medium speed for best results in
 Apply additional pressure for hard materials such as
 When drilling holes in tile, practice on a scrap piece to
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the workpiece to prevent ragged or splintered edges on
the back side of the hole.
The oil will prolong the life of the bit and increase the
drilling action.
without overheating the bit. Applying too much pressure
will:
• Overheat the drill;
• Wear the bearings;
• Bend or burn bits; and
then finish with a larger bit.
brick.
concrete.
determine the best speed and pressure. Begin drilling at
a very low speed to prevent the bit from slipping off the
starting point.
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