DeWalt XR DCD991 User Manual

12
ENGLISH
MAINTENANCE
Your power tool has been designed to 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/
Hammerdrill Operation (Fig. A)
1. Select the desired speed/torque range using the gear shifter
to match the speed and torque to the planned operation.
Set the torque adjustment collar
5
to the hammersymbol.
2. Select the high speed 3 setting by sliding the gear shifter
8
back (away form the chuck).
3. When drilling, use just enough force on the hammer to
keep it from bouncing excessively. Prolonged and too much
force on the hammer will cause slower drilling speeds and
potentialoverheating.
4. 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.
5. 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.
6. For masonry, use carbide‑tipped bits or masonry bits. A
smooth, even flow of dust indicates the proper drillingrate.
Drill Operation (Fig. A)

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. Select the desired speed/torque range using the gear
shifter
8
to match the speed and torque to the planned
operation. Set the torque adjustment collar
5
to the
drillsymbol.
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.
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.
NOTE: The torque adjustment collar may be set to any number
at anytime.
Screwdriver Operation (Fig. A)
1. Select the desired speed/torque range using the
three‑speed gear shifter
8
on the top of the tool. If using
the torque adjustment collar
5
, initially set the three‑speed
gear shifter to speed 2or 3. This ensures effective control
over the fastener allowing the screw to be seated correctly
and set to specification. Speed 1will provide the same
clutching torque as speeds 2and 3. However, for optimum
performance of the electronic clutch, speeds 2and
3arepreferred.
NOTE: Use the lowest torque setting (1) first and increase
the number through to the highest setting (11) to seat the
fastener at the desired depth. The lower the number, the
lower the torqueoutput.
2. Reset the torque adjustment collar
5
to the appropriate
number setting for the torque desired. Make a few practice
runs in scrap or unseen areas to determine the proper
position of the torque adjustmentcollar.
Proper Hand Position (Fig. I)

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 main
handle 
15
, with the other hand on the side handle
14
to
control the twisting action of thedrill.
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 battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start‑up can causeinjury.
Your tool features a keyless chuck
6
with one rotating chuck
sleeve
7
for one‑handed operation of the chuck. To insert a drill
bit or other accessory, follow thesesteps.
1. Turn tool off and disconnect tool from powersource.
2. Grasp the black sleeve of the chuck with one hand and
use the other hand to secure the tool. Rotate the sleeve
anticlockwise (as viewed from the front) far enough to
accept the desiredaccessory.
3. Insert the accessory about 19 mm into the chuck and
tighten securely by rotating the chuck sleeve clockwise
with one hand while holding the tool with the other hand.
Continue to rotate the chuck sleeve until several ratchet
clicks are heard to ensure full grippingpower.
NOTE: Be sure to tighten chuck with one hand on
the chuck sleeve and one hand holding the tool for
maximumtightness.
To release the accessory, repeat steps 1 and 2above.

DeWalt XR DCD991 Specifications

General

Voltage	20V
Chuck Size	1/2 inch
Max RPM	2000 RPM
Speed Settings	3
LED Light	Yes
Weight	4.6 lbs
Max Power	820 UWO
No Load Speed (RPM)	0-450 / 0-1300 / 0-2000 RPM
Battery Type	Lithium-Ion
Tool Type	Cordless Drill/Driver
Length	8.4 inches