DeWalt D25052-XE Instruction Manual page 10

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.
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.
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.
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 can be made with the same twist drills used for
metal. These bits may overheat unless pulled out frequently to clear chips from the flutes.
For larger holes, use spade bits, power auger bits, or hole saws. Work that is apt to
splinter should be backed up with a block of wood.
HAMMERDRILL OPERATION
1. When drilling, use just enough force on the hammer to keep it from bouncing
excessively or "rising" off the bit. Too much force will cause slower drilling
speeds, overheating, and a lower drilling rate.
2. Drill straight, keeping the bit at a right angle to the work. Do not exert side
pressure on the bit when drilling as this will cause clogging of the bit flutes and a
slower drilling speed.
3. When drilling deep holes, if the hammer speed starts to drop off, pull the bit
partially out of the hole with the tool still running to help clear debris from the
hole.
4. For masonry, use carbide-tipped bits or masonry bits. A smooth even flow of
dust indicates the proper drilling rate.
8