Prior To Operation - DeWalt D21716 Original Instructions Manual

trigger switch is in the OFF position. An
accidental start-up can cause injury.
Selecting the Operating Mode (fi g. B)
The tool can be used in two operating modes:
Rotary drilling:
for steel, wood and plastics.
Percussion drilling:
simultaneous rotating and impacting for
concrete and masonry drilling operations.
• Select the required operating mode by rotating
the mode selector (4) to the required position.
Inserting and Removing a Bit (fi g. A)
Keyless chuck
• Open the chuck by turning the sleeve (9)
counterclockwise and insert the bit shank.
• Tighten fi rmly by turning the sleeve clockwise.
Keyed Chuck
• Open the chuck by turning the sleeve (9)
counterclockwise and insert the bit shank.
• Put the chuck key (10) into each hole in the side
of the chuck and turn clockwise until tight.
• To remove the bit, proceed in reverse order.
Fitting the Side Handle (fi g. A)
The side handle (6) can be fi tted to suit both
RH- and LH-users.
WARNING: Always use the drill with the
side handle properly assembled.
• Loosen the side handle.
• For RH-users, slide the side handle clamp over
the collar behind the chuck, handle at the left.
• For LH-users, slide the side handle clamp over
the colar behind the chuck, handle at the right.
• Rotate the side handle to the desired position
and tighten the handle.
Setting the Drilling Depth (fi g. C)
• Insert the required drill bit into the chuck.
• Slacken the side handle (6).
• Fit the depth adjustment rod (7) through the hole
in the side handle clamp.
• Adjust the drilling depth as shown.
• Tighten the side handle.
Forward/reverse Slider (fi g. A)
• To select forward or reverse rotation, use the
forward/reverse-switch (3) (see arrow on tool).
WARNING: Always wait until the motor
has come to a complete standstill before
changing the direction of rotation.
Chuck Removal (fi g. E, F)
• Open the chuck jaws as far as possible.
• Insert a screwdriver into the chuck and remove
the chuck retaining screw (12) by turning
clockwise.
• Tighten an Allen key into the chuck and strike it
with a hammer as shown.

Prior to Operation

• Insert the appropriate bit.
• Mark the spot where the hole is to be drilled.
OPERATION
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.
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, D)
WARNING: To reduce the risk of serious
personal injury, ALWAYS use proper
hand position as shown.
E N G L I S H
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