DeWalt DCD771 Manual De Instrucciones página 11

Proper hand position requires one hand on the main
handle 10 and the other hand holding the battery pack
Variable Speed Trigger and Forward/
Reverse Control Button (Fig. A)
The tool is turned on and off by pulling and releasing
the variable speed trigger 3 . The farther the trigger is
depressed, the higher the speed of the tool. Your tool is
equipped with a brake. The chuck will stop as soon as the
trigger switch is fully released.
A forward/reverse control button
rotational direction of the tool and also serves as a
lock-off button.
• To select forward rotation (clockwise), release the trigger
and depress the forward/reverse control button on the
right side of the tool.
• To select reverse (counterclockwise), depress the
forward/reverse control button on the left side of
the tool.
NOTE: The center position of the control button locks the
tool in the off position. When changing the position of the
control button, be sure the trigger is released.
NOTE: Continuous use in variable speed range is not
recommended. It may damage the switch and should
be avoided.
NOTE: The first time the tool is run after changing the
direction of rotation, you may hear a click on start up. This is
normal and does not indicate a problem.
Worklight (Fig. A)
The worklight 8 is activated when the trigger switch is
depressed, and will automatically turn off 20 seconds after
the trigger switch is released. If the trigger switch remains
depressed, the worklight will remain on.
NOTE: The worklight is for lighting the immediate work
surface and is not intended to be used as a flashlight.
Performing an Application (Fig. A)

WARNING: To reduce the risk of personal
injury, ALWAYS ensure workpiece is anchored or
clamped firmly.

WARNING: Always wait until the motor has come to
a complete standstill before changing the direction
of rotation.
Prior to Performing Work
• Set the speed selector 9
• Install the appropriate bit or accessory into the
chuck. Refer to Installing a Bit or Accessory into a
Keyless Chuck.

WARNING:
• Do not use this tool to mix or pump easily
combustible or explosive fluids (benzine,
alcohol, etc.).
• Do not mix or stir flammable liquids
labeled accordingly.
1
4 determines the
. Refer to Speed Selection.
Screwdriving
.
Your tool has a clutch with adjustable torque for driving
and removing a wide array of fastener shapes and sizes. The
numbers 1–15 on the mode selection collar
set a torque range for screwdriving. The higher the number
on the collar, the higher the torque and the larger the
fastener which can be driven.
1. Turn the mode selection collar
desired position. Refer to Mode Selection.
2. Pull the trigger switch applying pressure in a straight
line with the bit until the fastener is seated at the
desired depth in the workpiece.
Recommendations for Screwdriving
• Start with lower torque settings, then advance to higher
torque settings to avoid damage to the workpiece
or fastener.
• Make some practice runs in scrap or on unseen areas of
the workpiece to determine the proper position of the
mode selection collar.
Drilling
IMPORTANT: For MASONRY, such as brick, cement, cinder
block, etc., use carbide-tipped masonry bits.
1. Turn the mode selection collar
Refer to Mode Selection.
2. Place drill bit in contact with the workpiece.
NOTE: Use sharp drill bit only.
3. Pull the trigger switch applying pressure in a straight
line with the bit until it reaches the desired depth.

WARNING: 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. Keep the motor running when pulling the bit back out
of a drilled hole to prevent jamming.
Recommendations for Drilling
• When drilling, always apply pressure in a straight line
with the bit, but do not push hard enough to stall the
motor or deflect the bit.
• IF ThE DRILL STALLS:
RELEASE TRIggER SWITCh IMMEDIATELY,
-
remove drill bit from work, and determine cause
of stalling.
- DO NOT DEPRESS TRIggER SWITCh ON AND
OFF IN AN ATTEMPT TO START A STALLED
DRILL—ThIS CAN DAMAgE ThE DRILL.
- To minimize stalling or breaking through the
material, reduce pressure on drill and ease the bit
through the last fractional part of the hole.
• Large holes (5/16" to 1/2" [7.9 mm to 12.7 mm]) in steel
can be made easier if a pilot hole (5/32" to 3/16" [4 mm
to 4.8 mm]) is drilled first.
• If drilling thin material or material that is prone to
splinter, use a wood "back-up" block to prevent damage
to the workpiece.
MAINTENANCE

WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
ENgLISh
5 are used to
to the
5
to the drill symbol.
5
9