Overload Clutch; Drilling Tools; Drilling Operation - DeWalt D25052 Instruction Manual

FIG. 5
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.
A WARNING: To reduce the risk of personal injury, ALWAYS
ensure workpiece is anchored or clamped firmly. If drifting 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.