Drill Operation - DeWalt DC901 Instructions Manual

ENGLISH
Instructions for Use
WARNING:
• Always observe the safety instructions
and applicable regulations.
• Be aware of the location of pipework and
wiring.
• Apply only a gentle pressure to the tool.
Excessive force does not speed up drilling
but decreases tool performance and may
shorten tool life.
Proper Hand Position (fi g. A, G)
WARNING: To reduce the risk of serious
personal injury, ALWAYS use proper
hand position as shown.
WARNING: To reduce the risk of serious
personal injury, ALWAYS hold securely in
anticipation of a sudden reaction.
Proper hand position requires one hand on the side
handle (9), with the other hand on the grip (8).
Switching On and Off (fi g. A, E)
• To run the tool, press the variable speed switch
(1). The pressure exerted on the variable speed
switch determines the tool speed.
• To stop the tool, release the switch.
• To lock the tool in the off position, move the
forward/reverse slider (2) to the central position.
Screwdriver Operation
Select the desired speed/torque range using the
three-speed gear shift lever on the top of tool
to match the speed and torque to the planned
operation. Insert the desired fastener accessory into
the chuck as you would any drill bit. Set the torque
adjustment collar (fi g. A, 4) to the desired setting.
Make a few practice runs in scrap or unseen areas to
determine the proper position of the clutch collar.

Drill Operation

1. Select the desired speed/torque range using the
gear shifter to match the speed and torque to the
planned operation.
2. 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.
40
3. 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.
4. Hold tool firmly with both hands to control the
twisting action of the drill.
5. 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.
6. Keep the motor running when pulling the bit
back out of a drilled hole. This will help prevent
jamming.
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.
MAINTENANCE
Your D WALT power tool has been designed to
E
operate over a long period of time with a minimum
of maintenance. Continuous satisfactory operation
depends upon proper tool care and regular cleaning.
WARNING: To reduce the risk of
serious personal injury, turn tool
off and disconnect battery pack
before making any adjustments or
removing/installing attachments or
accessories. An accidental start-up can
cause injury.
The charger and battery pack are not serviceable.
There are no serviceable parts inside.