10
English
Cleaning
 WARNING: Blow dirt and dust out of all air vents with clean, dry air 
at least once a week. To minimize the risk of eye injury, always wear 
ANSI Z87.1 approved eye protection when performing this. 
 WARNING: Never use solvents or other harsh chemicals for 
cleaning the non-metallic parts of the tool. These chemicals may 
weaken the plastic materials used in these parts. Use a cloth 
dampened only with water and mild soap. Never let any liquid get 
inside the tool; never immerse any part of the tool into a liquid.
Accessories
 WARNING:  Since accessories, other than those offered by 
D
EWALT, have not been tested with this product, use of such 
accessories with this tool could be hazardous. To reduce the risk of 
injury, only D
EWALT recommended accessories should be used with 
this product. 
Recommended accessories for use with your tool are available at 
extra cost from your local dealer or authorized service center. If you 
need assistance in locating any accessory, please contact D
EWALT 
Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, 
call 1-800-4-D
EWALT (1-800-433-9258) or visit our website: www.
dewalt.com.
MAXIMUM RECOMMENDED CAPACITIES 
Maximum Capacity  1-1/8" (28.5 mm) Concrete
R.P.M.  0–820 (No Load)
BITS, Metal Drilling  1/2" (13 mm)
Wood, Flat Boring  1-1/8" (28.5 mm)
Optimum Capacity  1/2" - 1" (13 to 25 mm) Concrete
No-load BPM  0-4,700
  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 indicates the proper drilling rate.
Chipping and Chiselling (Fig. 1)
  1. Set the mode selector switch (G) to the hammering only position.
  2. Insert the appropriate chisel and rotate it by hand to lock it.
  3. Adjust the side handle (C) as required.
  4. Be sure chisel is in contact with work surface before depressing 
the trigger switch.
  5. Always fully release the trigger switch when work is finished and 
before unplugging.
MAINTENANCE
 WARNING: To reduce the risk of injury, turn unit off 
and disconnect it from power source before installing and 
removing accessories, before adjusting or when making 
repairs. An accidental start-up can cause injury.
Motor Brushes
DEWALT uses an advanced brush system which automatically stops 
the drill when the brushes wear out. This prevents serious damage 
to the motor. New brush assemblies are available at authorized 
D
EWALT service centers. Always use identical replacement parts.