DeWALT DC910 ユーザーズマニュアル

RBRC™ in cooperation with D

E

WALT and other battery users, has established programs in the 

United States to facilitate the collection of spent lithium ion batteries. Help protect our environ-
ment and conserve natural resources by returning the spent lithium ion battery to an authorized 
D

E

WALT service center or to your local retailer for recycling. You may also contact your local 

recycling center for information on where to drop off the spent battery.

RBRC™ is a registered trademark of the Rechargeable Battery Recycling Corporation.

  1. The best storage place is one that is cool and dry away from direct sunlight and excess heat 

or cold.

  2.  Long storage will not harm the battery pack or charger. Under proper conditions, they can be 

stored for 5 years or more.

Your battery pack requires a 1 hour D

E

WALT charger. Be sure to read all safety instructions 

before using your charger. Consult the chart on the back of this manual for compatibility of 
chargers and battery packs.

  1. Plug the charger into an appropriate outlet before inserting the battery pack.
  2.  Insert the battery pack into the charger. The charger is equipped with a three-light fuel gauge 

that will blink according to the state of charge of the battery pack.

  3.  The completion of charge is indicated by the three red lights remaining ON continuously. The 

pack is fully charged and may be used at this time or left on the charger.

  0% - 33%  

1

st

 light blinks

  33% - 66%   1

st

 light on, 2

nd

 light blinks

  66% - 99%   1

st

, 2

nd

 lights on, 3

rd

 light blinks

 100%  1

st

,  2

nd

, 3

rd

 lights on

This charger is designed to detect certain problems that can arise with the battery packs or the 
charger. Problems are indicated by the three red lights flashing together in different patterns.

PROBLEM POWER LINE
When the charger is used with some portable power sources such as generators or sources 
that convert DC to AC, the charger may temporarily suspend operation. The three red lights will 
flash together with two fast blinks followed by a pause. This indicates that the power source 
is out of limits.

BAD BATTERY
The charger can detect a weak or damaged battery. The three red lights will flash together with 
rapid blinking. The battery will no longer charge and should be returned to a service center or 
a collection site for recycling.

BAD CHARGER
The charger will detect if it is not functioning properly. The three red lights will flash together 
with one fast blink followed by a long blink. The charger will no longer work and should be 
returned to an authorized service center or replaced.

LEAVING THE BATTERY IN THE CHARGER
The charger and battery pack can be left connected with the red lights glowing indefinitely. The 
charger will keep the battery pack fresh and fully charged. This charger features an automatic 
tune-up mode which equals or balances the individual cells in the battery pack to allow it to 
function at peak capacity. Battery packs should be tuned up weekly or whenever the battery no 
longer delivers the same amount of work. To use the automatic tune-up mode, place the battery 
pack in the charger and leave it for at least 8 hours.

  1. Longest life and best performance can be obtained if the battery pack is charged when the 

air temperature is between 65°F and 75°F (18°- 24°C). DO NOT charge the battery pack in 
an air temperature below +40°F (+4.5°C), or above +105°F (+40.5°C). This is important and 
will prevent serious damage to the battery pack.

  2. The charger and battery pack may become warm to touch while charging. This is a normal 

condition, and does not indicate a problem. To facilitate the cooling of the battery pack after 
use, avoid placing the charger or battery pack in a warm environment such as in a metal 
shed, or an uninsulated trailer.

  3. If the battery pack does not charge properly:
  

a. 

 

Check current at receptacle by plugging in a lamp or other appliance

  

b. 

 

Check to see if receptacle is connected to a light switch which turns power off when you 
turn out the lights. 

  

c. 

 

Move charger and battery pack to a location where the surrounding air temperature is 
approximately 65°F - 75°F (18°- 24°C). 

  

d. 

 

If charging problems persist, take the tool, battery pack and charger to your local 
service center.

  4. The battery pack should be recharged when it fails to produce sufficient power on jobs which 

were easily done previously. DO NOT CONTINUE to use under these conditions. Follow the 
charging procedure. You may also charge a partially used pack whenever you desire with no 
adverse affect on the battery pack.

  5. Foreign materials of a conductive nature such as, but not limited to, steel wool, aluminum 

foil, or any buildup of metallic particles should be kept away from charger cavities. Always 
unplug the charger from the power supply when there is no battery pack in the cavity. Unplug 
charger before attempting to clean.

  6. Do not freeze or immerse charger in water or any other liquid.

To turn the tool on, squeeze the trigger switch (A). To turn the tool off, release the trigger switch. 
Your tool is equipped with a brake. The chuck will stop as soon as the trigger switch is fully 
released. 
NOTE: Continuous use in variable speed range is not recommended. It may damage the switch 
and should be avoided.

A forward/reverse control button (B) determines the direction the tool will spin and also serves 
as a lock-off button. 
To select forward rotation, release the trigger switch and depress the for ward/re verse control 
button on the right side of the tool.
To select reverse, depress the forward/reverse control button on the left side of the tool. 
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: 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. 

Your drill is equipped with a separate mode control collar (Fig. 1, C) to switch between drilling, 
screwdriving and hammerdrilling mode. 

SCREWDRIVING (FIG. 2)
  1. Select the desired speed/torque range using the three-speed gear shifter (E) on the top of 

tool to match the speed and torque to the planned application. To set the torque level to the 
proper setting on the clutch collar, initially set the clutch collar at a lower setting to ensure 
the fastener to be set to your specification. 

    NOTE: Use the lowest torque setting required to seat the fastener at the desired depth. The 

lower the number, the lower the torque output.

  2. Rotate the mode control collar (C) so the screw symbol is aligned with the arrow. 
 3. Set the torque adjustment collar (D) to the appropriate number setting for the torque 

desired.

    NOTE: The torque adjustment collar may be set on any number and change between screw-

driving and drilling modes using the mode control collar. 

regardless of the position of the torque adjustment collar (D).
Rotate the mode control collar (C) so the drill symbol is aligned with the arrow.
NOTE: The torque adjustment collar (D) may be set on any number. 

HAMMERDRILLING (FIG. 4)
Rotate the mode control collar (C) so the hammer symbol is aligned with the arrow.

Your tool has an adjustable torque screwdriver mechanism for driving and removing a wide array 
of fastener shapes and sizes and a hammer mechanism for drilling into masonry. Circling the 
torque adjustment collar (D) are numbers. These numbers are used to set the clutch to deliver 
a torque range. The higher the number on the collar, the higher the torque and the larger the 
fastener which can be driven. To select any of the numbers, rotate until the desired number aligns 
with the arrow.

The three-speed feature of your tool allows you to shift gears for greater versatility. To select 
speed 1 (highest torque setting), turn the tool off and permit it to stop. Slide the gear shifter (E) 
all the way to the left. Speed 2 (middle torque and speed setting) is in the middle position. Speed 
3 (highest speed setting) is to the right. 
NOTE: Do not change gears when the tool is running. Always allow the drill to come to a com-
plete stop before changing gears. If you  have trouble changing gears, make sure that the gear 
shifter is engaged in one of the three speed settings.

TO INSERT A DRILL BIT OR OTHER ACCESSORY
  1. Lock the trigger in the OFF position. 
  2. Grasp the chuck sleeve (F) with one hand and use the other hand to secure the tool as 

shown in Figure 5. Rotate the sleeve counterclockwise (viewed from the front) far enough to 
accept the desired accessory. 

  3. Insert the bit or other accessory about 3/4" (19 mm) into the chuck, as shown in Figure 6. 

Grasp the chuck sleeve securely and rotate the sleeve clockwise (viewed from the front) 
with one hand while using the other hand to secure the tool. Rotate the sleeve clockwise 
until sleeve cannot be rotated any further, as demonstrated in Figure 7. As the drill is being 
operated in the forward position, the chuck will continually self-tighten the jaws of the chuck 
onto the bit to maximize the bit gripping strength. 

To release the accessory, repeat Step 2.

NOTE: Make sure your battery pack is fully charged. 

switch actuation before removing or installing battery.
To install the battery pack into the tool handle, align the base of the tool with the rails inside 
the tool’s handle and slide the battery pack firmly into the handle until you hear the lock snap 
into place (Fig. 8).
To remove the battery pack from the tool, press the release button (G) and firmly pull the 
battery pack out of the tool handle. Insert it into the charger (Fig. 9) as described in the charger 
section of this manual.

handle properly installed. Failure to do so may result in the side handle slipping during tool 
operation and subsequent loss of control. Hold tool with both hands to maximize control.
Side handle clamps to the front of the gear case as shown and may be

 

rotated to permit right- or left-hand use. Side handle must be tightened suf-
ficiently to resist the twisting action of the tool if the accessory binds or 
stalls. Be sure to grip the side handle at the far end to control the tool during 
a stall. 
If model is not equipped with side handle, grip drill with one hand on the 
handle and one hand on the battery pack.

  1. Select the desired speed/torque range using the gear shifter to match the speed and torque 

to the planned operation.

  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. 

  1. When drilling, use just enough force on the hammer to keep it from bouncing excessively or 

“rising” off the bit. Too much force will cause slower drilling speeds, overheating, and a lower 
drilling rate.

  2. 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.

  3. 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.

  4. For MASONRY, use carbide-tipped bits or masonry bits. A smooth, even flow of dust indi-

cates the proper drilling rate.

Select the desired speed/torque range using the three-speed gear shift lever on the top of tool 
to match the speed and torque to the planned operation. Insert the desired fastener accessory 
into the chuck as you would any drill bit. Set the torque adjustment collar (D) to the desired 
setting. Make a few practice runs in scrap or unseen areas to determine the proper position of 
the clutch collar. 

The charger is not serviceable. There are no serviceable parts inside the charger. 
READ ALL OF THE INSTRUCTIONS IN THE BATTERY CHARGER SECTION OF THIS 
MANUAL BEFORE ATTEMPTING TO CHARGE THE BATTERY PACK FOR YOUR TOOL
To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment (including 
brush inspection and replacement) should be performed by a D

E

WALT factory service center, 

a D

E

WALT authorized service center or other qualified service personnel. Always use identical 

replacement parts.

FIG. 1

A

B

C

D

FIG. 8

G

FIG. 9

FIG. 5

FIG. 6

FIG. 7

F

FIG. 2

D

C

E

SCREWDRIVING

VISSAGE 

DESTORNILLADOR 

D

E

FIG. 4

HAMMERDRILLING

MARTEAU PERFORATEUR 

TALADRO PERCUTOR 

FIG. 3

DRILLING

PERÇAGE 

TALADRO 

C