Hilti TE 70-D/AVR Operating Instructions Manual page 26

6. Check that the insert tool has engaged correctly by
pulling it.
7.1.2 Removing the insert tool 5
1. Disconnect the mains plug from the power outlet.
2. Open the chuck by pulling back the insert tool un-
locking device.
3. Pull the insert tool out of the chuck.
en
7.2 Operation
CAUTION
Working on the material may cause it to splinter. Wear
eye protection and protective gloves. Wear breathing
protection if no dust removal system is used. Splin-
tering material presents a risk of injury to the eyes and
body.
CAUTION
The work generates noise. Wear ear protectors. Expos-
ure to noise can cause hearing loss.
CAUTION
Switch the power tool on only after bringing it into the
working position.
CAUTION
Do not operate the function selector switch while the
motor is running.
7.2.1 Hammer drilling 6
NOTE
Working at low temperatures: The hammering mech-
anism works only when the power tool has reached a
minimum operating temperature. Bring the tip of the drill
bit or chisel into contact with the workpiece and allow
the power tool to run under no load until it reaches
the minimum operating temperature. If necessary, repeat
this procedure until the hammering mechanism begins to
operate.
1. Turn the function selector switch until it engages in
the "Hammer drilling" position.
2. Bring the side handle into the desired position and
check that it is fitted correctly and secured.
3. Plug the supply cord into the power outlet.
4. Set the desired drilling power (optional).
NOTE After connecting the supply cord to the elec-
tric supply, the power tool is always set to full drilling
power.
NOTE To set the power tool to reduced (50%) drilling
power (depends on version), press the reduced-
power button. The reduced-power LED lights to
indicate reduced power. Press the reduced-power
button again to switch to full power. The reduced-
power LED then goes out.
22
5. Position the power tool and drill bit at the point
where the hole is to be drilled.
6. Press the control switch slowly (drill at a low speed
until the drill bit centers itself in the hole).
7. Press the control switch fully to continue working at
full power.
NOTE Do not apply excessive pressure. This will not
increase the power tool's hammering performance.
Lower pressure extends the life of the insert tool.
8. Reduce drilling speed shortly before breaking
through in order to avoid spalling.
7.2.2 Active Torque Control (TE 70‑ATC/AVR and
TE 80‑ATC/AVR)
In addition to the mechanical safety slip clutch, the power
tool is also equipped with the Active Torque Control sys-
tem. This system offers additional comfort while drilling
as it causes rapid shutdown upon sudden rotation of
the power tool about the drill bit axis, e.g. when the
drill bit sticks due to hitting a rebar or when the drill bit
is tilted unintentionally. When the torque control system
has become activated, the power tool can be restarted by
releasing the control switch and re-engaging it after the
motor has stopped rotating (a "click" indicates that the
power tool is again ready for operation). Always choose a
working position in which the electric tool is free to rotate
in a counterclockwise direction (as seen by the operator).
If this rotation is not possible, the ATC system will be
unable to react.
7.2.3 Drilling without hammering
Drilling without hammering is possible when drill bits with
a special connection end are used. Drill bits of this kind
are available from Hilti. For example, when the keyless
quick-release chuck is fitted, smooth-shank drill bits for
wood or steel can be used to drill without hammering.
The function selector switch must be set to the "Hammer
drilling" position when the power tool is used in this way.
7.2.4 Chiseling (depends on version) 7
NOTE
The chisel can be adjusted to 24 different positions
(in 15° increments). This ensures that flat chisels and
shaped chisels can always be set to the optimum working
position.
CAUTION
Do not operate the power tool when the selector switch
is set to "Chisel adjustment".
1. To adjust the position of the chisel, turn the func-
tion selector switch until it engages in the "Chisel
adjustment" position.
2. Bring the side handle into the desired position and
check that it is fitted correctly and secured.
3. Rotate the chisel to the desired position.
4. To lock the chisel in the desired position, turn
the function selector switch until it engages in the
"Chiseling" position. Do not operate the function
selector switch while the motor is running.