Prior To Operation - DeWalt D21710 Instruction Manual

WARNING: Always wait until the motor has come to a
complete standstill before changing the direction of rotation.
Chuck Removal (Fig. 4)
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 Allen key into the chuck and strike it with a hammer
as shown.
OPERATION
WARNING: To reduce the risk of injury, turn unit off and
disconnect tool from power source before installing and
removing accessories, before making any adjustments or
removing/installing attachments or accessories.
WARNING: Be aware of the location of pipework and wiring.
WARNING: Apply only a gentle pressure to the tool. Excessive
force does not speed up drilling but decreases tool performance
and may shorten tool life.

PRIOR TO OPERATION

• Insert the appropriate bit.
• Mark the spot where the hole is to be drilled.
Switching On and Off (Fig. 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.
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.
FIG. 3
G
FIG. 4
L
6
F