ENGLISH
9
  3. To remove the chuck, proceed as for removing 
a standard SDS Plus bit.
   WARNING: Never use standard chucks 
in the hammerdrilling mode.
Replacing the SDS Plus Tool Holder 
with the Keyless Chuck (fig. 7)
D25134, D25144
  1. Turn the locking collar (m) into the unlocking 
position and pull the SDS Plus Tool Holder (f) 
off.
  2. Push the keyless chuck (n) onto the spindle 
and turn the locking collar (m) to the locking 
position.
To replace the keyless chuck with the SDS Plus tool 
holder, first remove the keyless chuck the same way 
the tool holder was removed. Then place the tool 
holder the same way the keyless chuck was placed, 
making sure to turn the locking collar to the locking 
position.
   WARNING: Never use standard chucks 
in the hammerdrilling mode.
Replacing the Dust Cover (fig. 1)
The dust cover (k) prevents dust ingress into the 
mechanism. Replace a worn dust cover immediately.
  1. Pull back the tool holder locking sleeve (j) and 
pull the dust cover (k) 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. 9). Always operate the tool with 
the side handle properly mounted.
Proper Hand Position (fig. 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 (h), with the other hand on the main handle 
(b). 
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.
  3. To stop the tool, release the switch.
Hammerdrilling (fig. 1)
DRILLING WITH A SOLID BIT
  1. Hold down the mode selector button (e) 
then 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 (h) 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. Hold down the mode selector button (e) 
then set the mode selector switch (d) to the 
hammerdrilling position.
  2. Adjust the side handle (h) 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 
on/off 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