8
English
Overload Clutch
If the drill bit becomes jammed or caught, the drive to the drill
spindle is interrupted by the overload clutch. Because of the forces
that occur as a result, always hold the machine securely with both
hands and take a firm stance.
Drilling Tools
The machine is intended for hammerdrilling in concrete, brick and
stone. It is also suitable for drilling without impact in wood, metal,
ceramic and plastic.
Drilling (Fig. 1)
WARNING: To reduce the risk of serious personal injury,
turn tool off and disconnect tool from power source before
making any adjustments or removing/installing attachments
or accessories.
WARNING: To reduce the risk of personal injury, ALWAYS
ensure workpiece is anchored or clamped firmly. If drilling thin
material, use a wood “back-up” block to prevent damage to the
material.
Press mode selector button (F) and turn the mode selector (G) to the
drill bit symbol for drilling, to the hammer symbol for hammering or to
the hammerdrill symbol for hammerdrilling.
DRILLING OPERATION
1. For WOOD, use twist bits, spade bits, power auger bits or
hole saws. For METAL, use high-speed steel twist drill bits or
hole saws. Use a cutting lubricant when drilling metals. The
exceptions are cast iron and brass which should be drilled
dry. For MASONRY, use carbide-tipped bits or masonry bits. A
smooth, even flow of dust indicates the proper drilling rate.
2. Always apply pressure in a straight line with the bit. Use enough
pressure to keep the drill bit biting, but do not push hard enough
to stall the motor or deflect the bit.
3. Hold tool firmly with both hands to control the twisting action of
the drill.
WARNING: Drill may stall if overloaded causing a sudden twist.
Always expect the stall. Grip the drill firmly with both hands to
control the twisting action and avoid injury.
4. IF DRILL STALLS, it is usually because it is being overloaded.
RELEASE TRIGGER IMMEDIATELY, remove drill bit from
work, and determine cause of stalling. DO NOT CLICK
TRIGGER OFF AND ON IN AN ATTEMPT TO START A
STALLED DRILL – THIS CAN DAMAGE THE DRILL.
5. To minimize stalling or breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part
of the hole.
6. Keep the motor running when pulling the bit back out of a drilled
hole. This will help prevent jamming.
7. With variable speed drills there is no need to center punch
the point to be drilled. Use a slow speed to start the hole and
accelerate by squeezing the trigger harder when the hole is
deep enough to drill without the bit skipping out.
DRILLING IN METAL
An SDS Plus
®
to round shank adaptor chuck is required. Ensure
that tool is in drill-only mode. Start drilling with slow speed and
increase to full power while applying firm pressure on the tool. A
smooth even flow of metal chips indicates the proper drilling rate.
Use a cutting lubricant when drilling metals. The exceptions are cast
iron and brass which should be drilled dry.
NOTE: Large [5/16" to 1/2" (7.9 mm to 12.7 mm)] holes in steel can
be made easier if a pilot hole [5/32" to 3/16" (4 mm to 4.8 mm)] is
drilled first.
DRILLING IN WOOD
An SDS Plus
®
to round shank adaptor chuck is required. Ensure that
tool is in drill-only mode. Start drilling with slow speed and increase
to full power while applying firm pressure on the tool. Holes in wood
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