14
OPERATING INSTRUCTIONS
e. Move the drill bit (not included) into the workpiece, applying only enough pressure to keep
the bit drilling. Do not force the hammer drill or apply side pressure to elongate a hole. Let
the tool do the work.
f. When drilling hard, smooth surfaces, use a center punch to mark the desired location of
the hole. This will prevent the drill bit from slipping off center as the hole is started.
g. If the bit jams in the workpiece or if the hammer drill stalls, stop the tool immediately.
Remove the bit from the workpiece and determine the reason for jamming.
h. To stop the hammer drill, release the variable-speed trigger switch and allow the tool to
come to a complete stop.
Wood Drilling
a. For maximum performance, use high-speed steel or brad-point bits for drilling wood.
b. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
c. Increase speed as the drill bit bites into the material.
d. 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
a. For maximum performance, use high-speed steel bits for drilling metal or steel.
b. When drilling metals, use 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.
c. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
d. Maintain a speed and pressure which will allow cutting without overheating the bit.
Applying too much pressure will:
– Overheat the tool.
– Wear the bearings.
– Bend or burn bits.
– Produce off-center or irregular-shaped holes.
Masonry Drilling
a. For maximum performance, use carbide-tipped masonry bits when drilling holes in brick,
concrete, etc.
b. Set the mode selector (D) to hammer mode
for best performance.
c. Maintain a speed and pressure which will allow cutting without overheating the bit or the
tool. Applying too much pressure will:
– Overheat the tool.
– Wear the bearings.
– Bend or burn bits.
– Produce off-center or irregularly-shaped holes.
d. Apply light pressure and medium speed for best results in brick.
e. Apply additional pressure for hard materials, such as concrete.
f. Begin drilling at a very low speed to prevent the bit from slipping off the starting point.
