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can be made with the same twist drills used for metal. These bits
may overheat unless pulled out frequently to clear chips from the
flutes. For larger holes, use spade bits, power auger bits, or hole
saws. Work that is apt to splinter should be backed up with a block
of wood.
HAMMERDRILL OPERATION
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 indicates the proper drilling rate.
Chipping and Chiselling
1. To switch from hammer drilling to chiselling, first insert the SDS-
plus® chisel and check if it is properly locked.
2. When switching from hammer drilling mode to chiselling mode,
turn the chisel to the desired position. If you find resistance
during mode change, turn the chisel slightly to engage the
spindle lock.
Depth Rod (Fig. 4)
TO ADJUST THE DEPTH ROD
1. Push in and hold the depth rod release button (J) on the side
handle.
2. Move the depth rod (D) so the distance between the end of the
rod and the end of the bit equals the desired drilling depth.
3. Release the button to lock rod into position. When drilling
with the depth rod, stop when end of rod reaches surface of
material.
FIG. 4
J
D
MAINTENANCE
Your DEWALT 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 injury, turn unit off and
disconnect tool from power source before installing and removing
accessories, before making any adjustments or removing/installing
attachments or accessories.
Cleaning
WARNING: Blow dirt and dust out of all air vents with dry air at
least once a week. Wear proper ANSI Z87.1 (CAN/CSA Z94.3) eye
protection and proper NIOSH/OSHA/MSHA respiratory 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.