DeWalt DC980 Mode D'emploi page 12

Drilling in Metal
Start drilling with slow speed and increase to full power while applying
firm pressure on the tool. A smooth even flow of metal chips indicates
the proper drilling rate. Use a cutting lubricant when drilling metals. The
exceptions are cast iron and brass which should be drilled dry.
NOTE: Large (5/16" to 1/2") holes in steel can be made easier if a pilot
hole (5/32" to 3/16") is drilled first.
Drilling in Masonry
(TOOLS WITHOUT A HAMMER FEATURE)
Use carbide tipped bits rated for percussion drilling and be certain
that the bit is sharp. Use a constant and firm force on the tool to drill
most effectively. A smooth, even flow of dust indicates the proper
drilling rate.
Operation as a Hammerdrill
Some models have the Hammerdrill feature. To utilize the hammer
feature of your tool, rotate the collar to align the hammer symbol with
the arrow shown in Figure 3. The hammering position is for hammer
drilling in soft concrete and masonry such as brick, mortar and soft
ceramics.
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 clog-
ging 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. Do not pour water into the hole to settle dust. Water causes clog-
ging of bit flutes which will tend to make the bit bind in the hole.
Operation as a Screwdriver
Select the desired speed/torque range using the 3 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 (Fig. 3). Make a
few practice runs in scrap or unseen areas to determine the proper
position of the clutch collar.
MAINTENANCE
Cleaning
CAUTION: With the motor running, blow dirt and dust out of all air
vents with dry air at least once a week. Wear safety glasses when per-
forming this. Exterior plastic parts may be cleaned with a damp cloth
and mild detergent. Although these parts are highly solvent resistant,
NEVER use solvents.
CHARGER CLEANING INSTRUCTIONS
WARNING: Disconnect the charger from the AC outlet before
cleaning. Dirt and grease may be removed from the exterior of the
charger using a cloth or soft non-metallic brush. Do not use water or
any cleaning solutions.
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment (including brush inspection and replacement) should
be performed by certified service centers or other qualified service
organizations, always using identical replacement parts.
Accessories
Recommended accessories for use with your tool are available at
extra cost from your local service center.
CAUTION: The use of any non-recommended accessory may be
hazardous.
If you need any assistance in locating any accessory, please contact
D WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD
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21286 or call 1-800-4-D WALT (1-800-433-9258).
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