Hilti UD16 Operating Instructions Manual page 14

used. Splintering material presents a risk of injury to
the eyes and body.
CAUTION
The work generates noise. Wear ear protectors.
Exposure to noise can cause hearing loss.
en
CAUTION
The insert tool and the chuck get hot during use.
Wear protective gloves when changing insert tools.
7.2.1 Keyless chuck
CAUTION
Disconnect the supply cord plug from the power
outlet.
NOTE
The keyless chuck may have to be rotated slightly by
hand before the built‐in drive spindle lock engages.
NOTE
Depending on the type of chuck fitted, either the broad
adjusting ring or the rear gripping ring on the chuck
must be held securely by hand.
7.2.1.1 Opening the keyless chuck 4
1. Grip the rotatable sleeve.
2. Turn the sleeve counterclockwise.
NOTE First, the locking mechanism will be re-
leased automatically.
3. Continue turning the sleeve until the insert tool is
released.
7.2.1.2 Closing the keyless chuck 5
1. Open the keyless chuck far enough to allow the
shank of the tool to be inserted.
2. Insert the shank of the tool in the keyless chuck.
3. Tighten the chuck by turning the rotatable sleeve
firmly in a clockwise direction.
4. After the jaws of the chuck begin to grip the tool,
continue turning the rotatable sleeve in a clock-
wise direction until the keyless chuck engages
and locks automatically.
NOTE The chuck must be heard to engage (several
clicks).
7.2.2 Key chuck
CAUTION
Disconnect the supply cord plug from the power
outlet.
26
NOTE
Use the key supplied to open the chuck and to tighten
it after inserting a tool.
7.2.2.1 Opening the key chuck 6
1. Insert the chuck key in one of the three holes
provided in the chuck.
2. Open the chuck by turning the key in a counter-
clockwise direction.
3. Remove the tool from the chuck.
4. Remove the chuck key.
7.2.2.2 Closing the key chuck 7
1. Open the key chuck far enough to allow the shank
of the tool to be inserted.
2. Insert the shank of the tool in the chuck.
3. Close the jaws by turning the rotatable toothed
ring until the tool is gripped by the chuck.
4. Insert the chuck key in one of the three holes
provided in the chuck.
5. Tighten the chuck by turning the chuck key in a
clockwise direction until the tool is held securely.
6. Remove the chuck key.
7.2.3 Possible applications
CAUTION
In accordance with the applications for which it is
designed, the power tool produces a high torque.
Always use the side handle and hold the power
tool with both hands. The user must be prepared for
sudden sticking and stalling of the insert tool.
CAUTION
If stalling occurs, switch off the motor immediately.
The power tool may suffer damage if stalled for longer
than 2‐3 seconds.
CAUTION
Do not operate the function selector switch while
the motor is running.
NOTE
The forward / reverse switch must be set to the
"forward" position.