21
Note
Use only original Hilti core bits and accessories!
1. Open the chuck by turning it counter-clockwise (as
seen from the front end of the chuck).
2. Insert the diamond core bit in the chuck.
3. Push the diamond core bit into the chuck and rotate
the core bit until it engages.
4. Close the chuck by turning it clockwise (as seen from
the front end of the chuck).
5. Check that the core bit it is securely seated by grip-
ping it and attempting to pull it away from the chuck.
6.3 Selecting the drilling speed (gear selector posi-
tions 1-2-3)
-CAUTION-
Do not operate the gear selector while the tool is run-
ning. Wait until rotation has stopped.
Hand-held use
278663
4
3
/
4
" - 6
1
/
2
"
2
5
/
8
" - 4
1
/
4
"
1
/
2
" - 2
1
/
2
"
I
II
III
1
5
/
8
" - 2
1
/
2
"
1
/
2
" - 1
1
/
2
"
II
III
122 - 162
67 - 112
12 - 62
40 - 62
12 - 37
mm
Inch
Drill-stand use
1. Select the gear according to the table on the tool.
2. Move the gear selector to the desired setting while
rotating the core bit.
6.4 Dry drilling
6.4.1 Connecting the extraction system
1. Unscrew the cover from the water swivel / extraction
head.
2. Insert the extraction hose in the extraction connec-
tion.
3. Close the water valve in the side handle.
6.5 Hand-held wet drilling
6.5.1 Connecting the water supply
1. Close the water valve in the side handle.
2. Close the cover on the dust extraction connection.
3. Connect the water supply hose (hose connector).
6.6 Hand-held wet drilling with the water collection
system
6.6.1 Fitting the water collection system
Use of the water collection system permits water to be
drained away from the core bit thus avoiding soiling the
surrounding area. Best results are achieved in conjunc-
tion with a wet-type vacuum cleaner.
-CAUTION-
■
The core bit may become hot during
use or during sharpening.
■
It may burn your hands.
■
The cutting edges (segments) may cause
injury.
■
Wear safety gloves when changing the
core bit.
3. Move the side handle into the desired position (15°
increments).
4. Tighten the locking ring securely until the teeth and
the water swivel lock engage.
6.2 Fitting the diamond core bit
