• Large holes (7.9 mm to 12.7 mm) in steel can be
made easier if a pilot hole (4 mm to 4.8 mm) is drilled
first.
• If drilling thin material or material that is prone to
splinter, use a wood “back‑ up” block to prevent
damage to the work piece.
Hammerdrilling
WARNING: Wear proper respiratory protection.
Collect residual dust with a vacuum or dust collection
system designed for the application.
DCD709 Only
iMPORTAnT: Use carbide‑ tipped or masonry bits rated
for percussion drilling only.
1. Select the desired speed/torque range using the speed
selector 7 to match the speed and torque to the
planned operation. Turn the mode selection collar 6
to the hammerdrill symbol.
2. Pull the trigger, applying just enough pressure on the
hammer to keep it from bouncing excessively or
"rising" off the bit.
Recommendations for hammerdrilling
• Too much force will cause slower drilling speeds,
overheating, and a lower drilling rate.
• A smooth even flow of material indicates the proper
drilling rate.
• Drill straight, keeping the bit at a right angle to the
work. Do not exert side pressure on the bit when
drillling as this will cause clogging of the bit flutes and
a slower drilling speed.
• When drilling deep holes, if the hammer speed starts
to drop off, pull the bit partially out of the hole with
tool still running to help clear debris from the hole.
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/ installing attachments or accessories. An
accidental start
‑
up can cause injury.
The charger and battery pack are not serviceable.
Lubrication
Your power tool requires no additional lubrication.
Cleaning
WARNING: Blow dirt and dust out of the main
housing with dry air as often as dirt is seen collecting in
and around the air vents. Wear approved eye protection
and approved dust mask when performing this
procedure.
WARNING: Never use solvents or other harsh chemicals
for cleaning the non
‑
metallic parts of the tool. These
chemicals may weaken the 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.
Optional Accessories
WARNING: Since accessories, other than those
offered by DeWALT, have not been tested with this
product, use of such accessories with this tool could
be hazardous. To reduce the risk of injury, only
DeWALT recommended accessories should be used
with this product. Consult your dealer for further
information on the appropriate accessories.
Protecting the Environment
Separate collection. Products and batteries
marked with this symbol must not be disposed
of with normal household waste.
Products and batteries contain materials
that can be recovered or recycled reducing the
demand for raw materials. Please recycle electrical
products and batteries
according to local provisions. Further information is
available at www.2helpU.com.
Rechargeable Battery Pack
This long life battery pack must be recharged when it
fails to produce sufficient power on jobs which were
easily done before. At the end of its technical life, discard
it with due care for our environment:
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