Prior To Operation - DeWalt D21710 Operator's Manual

EN GLIS H
Chuck Removal (fi g. 5)
1. Open the chuck jaws as far as possible.
2. Insert a screwdriver into the chuck and
remove the chuck retaining screw (l) by turning
clockwise.
3. Tighten an hex key into the chuck and strike it
with a hammer as shown.

Prior to Operation

1. Insert the appropriate bit.
2. Mark the spot where the hole is to be drilled.
OPERATION
Instructions for Use
WARNING: Always observe the safety
instructions and applicable regulations.
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:
• 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. 1, 4)
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 (f), with the other hand on the main handle
(k).
Switching On and Off (fi g. 1)
To run the tool, press the variable speed switch (a).
The pressure exerted on the variable speed switch
determines the tool speed.
If necessary, press the lock-on button (b) for
continuous operation and release the switch. The
lock-on button works only in full speed, forward
rotation.
8
To stop the tool, release the switch.
To stop the tool in continuous operation, press the
switch briefly and release it. Always switch off the
tool when work is finished and before unplugging.
Screwdriving
Select forward or reverse rotation.
Percussion Drilling (fi g. 1)
1. Select the percussion mode.
2. Press the switch (a).
Rotary Drilling (fi g. 1)
1. Select the rotary drilling mode.
2. Proceed as described for percussion drilling.
Drilling
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.
1. Use sharp drill bits only. For WOOD, use the
low speed setting and twist drill bits, spade bits,
power auger bits, or hole saws. For METAL, use
the low speed setting and steel twist drill bits or
hole saws.
2. Always apply pressure in a straight line with the
bit. Use enough pressure to keep drill 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.
CAUTION: Drill may stall if overloaded
causing a sudden twist. Always expect
the stall. Grip the drill firmly to control
the twisting action and avoid injury.
4. IF DRILL STALLS , it is usually because
it is being overloaded or improperly used.
RELEASE TRIGGER IMMEDIATELY , remove
drill bit from work, and determine cause of
stalling. DO NOT CLICK TRIGGER ON
AND OFF IN AN ATTEMPT TO START A
STALLED DRILL — THIS CAN DAMAGE
THE DRILL .