Operation - DeWalt D25124 Original Instructions Manual

Replacing the Dust Cover (fig. 3)
The dust cover (g) prevents dust ingress into the
mechanism. Replace a worn dust cover immediately.
1. Pull back the tool holder locking sleeve (l) and
pull the dust cover (g) off.
2. Fit the new dust cover.
3. Release the tool holder locking sleeve.

OPERATION

Instructions for Use
WARNING:
• 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 (approx. 5 kg). Excessive
force does not speed up drilling but
decreases tool performance and may
shorten tool life.
• Do not drill or drive too deep to
prevent damage to the dust cover.
• Always hold the tool firmly with both
hands and ensure a secure stance
(fig. 8). Always operate the tool with
the side handle properly mounted.
Proper Hand Position (fi g. 8)
WARNING: To reduce the risk of
serious personal injury, ALWAYS use
proper hand position as shown.
WARNING: To reduce the risk of
serious personal injury, ALWAYS hold
securely in anticipation of a sudden
reaction.
Proper hand position requires one hand on the
side handle (j), with the other hand on the main
handle (o).
Switching On and Off (fig. 1)
1. To run the tool, press the variable speed switch
(a). The pressure exerted on the variable speed
switch determines the tool speed.
2. For continuous operation, press and hold down
the variable speed switch, press the lock-on
button (b) and release the switch.
3. To stop the tool, release the switch.
4. To stop the tool in continuous operation, press
the switch briefly and release it. Always switch
off the tool when work is finished and before
unplugging.
Hammerdrilling (fig. 1)
DRILLING WITH A SOLID BIT
1. Set the mode selector switch (d) to the
hammerdrilling position.
2. Insert the appropriate drill bit.
NOTE: For best results use high quality carbide-
tipped bits.
3. Adjust the side handle (j) as required.
4. If necessary, set the drilling depth.
5. Mark the spot where the hole is to be drilled.
6. Place the drill bit on the spot and switch on the
tool.
7. Always switch off the tool when work is finished
and before unplugging.
DRILLING WITH A CORE BIT
1. Set the mode selector (d) to the hammerdrilling
position.
2. Adjust the side handle (j) as required.
3. Insert the appropriate core bit.
4. Assemble the centerdrill into the core bit.
5. Place the centerdrill on the spot and press the
variable speed switch (a). Drill until the core
penetrates into the concrete approx. 1 cm.
6. Stop drilling and remove the centerdrill. Place
the core bit back into the hole and continue
drilling.
7. When drilling through a structure thicker than
the depth of the core bit, break away the round
cylinder of concrete or core inside the bit at
regular intervals. To avoid unwanted breaking
away of concrete around the hole, first drill a
hole the diameter of the center drill completely
through the structure. Then drill the cored hole
halfway from each side.
8. Always switch off the tool when work is finished
and before unplugging.
Rotary Drilling (fig. 1)
1. Set the mode selector switch (d) to the "rotary
drilling" position.
2. Depending on your tool, follow either of the
following instructions:
– D25123: Fit the chuck adapter/chuck
assembly.
EN GL IS H
9