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ENGLISH
24 en - 7
Removing and fitting the chuck (fig. F & G)
Open the chuck jaws as far as possible.
Insert a screwdriver into the chuck and remove
the chuck retaining screw by turning clockwise
as shown in figure F.
Tighten an Allen key into the chuck and strike it
with a hammer as shown in figure G. This will
loosen the chuck so that it can be unscrewed
by hand.
To refit the chuck, proceed in reverse order.
Instructions for use
Always observe the safety instructions
and applicable regulations.
Be aware of the location of pipework and
wiring.
Apply only a gentle pressure to the tool.
Excessive force does not speed up
drilling but decreases tool performance
and may shorten tool life.
To minimise stalling on break-through,
progressively reduce the drill point
pressure towards the end of the
operation.
Keep the motor running when pulling the
bit back out of a drilled hole. This will
help prevent jamming.
Prior to operation:
Make sure your battery pack is (fully) charged.
Insert the appropriate bit.
Mark the spot where the hole is to be drilled.
Select forward or reverse rotation.
Switching ON and OFF (fig. A & D)
To run the tool, press the variable speed switch.
The pressure exerted on the variable speed
switch determines the tool speed.
To stop the tool, release the switch.
To lock the tool in OFF-position, move the
forward/reverse slider (2) to the central position.
The drill is equipped with a brake to stop
the tool as soon as the variable speed
switch is fully released.
Screwdriving (fig. A)
Select forward or reverse rotation using the
slider (2).
Set the collar (4) to position 1 and begin
screwdriving (low torque).
If the clutch ratchets too soon, adjust the collar
to increase the torque as required.
Drilling (fig. A)
Select the drilling mode using the collar (4).
Drilling in metal
Use a cutting lubricant when drilling metals.
The exceptions are cast iron and brass which
should be drilled dry.
Drilling in wood
Holes in wood 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 Auger bits.
Use a block of wood to back up workpieces that
may splinter.
DW909/DW912/DW914/DW997 -
Percussion drilling
Drilling in masonry
Use carbide-tipped masonry bits up to 10 mm ø
at high speed. Select low speed for larger ø bits.
Keep even force on the drill. A smooth, even flow
of dust indicates the proper drilling rate.
Consult your dealer for further information on the
appropriate accessories.
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.
Lubrication
Your Power Tool requires no additional lubrication.
29


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