Speed Selection; Switching On / Off - Hilti SF 144-A Manual De Instrucciones

3. Tighten the side handle by turning the grip clock-
wise.
4. Check that it holds securely.

7.3 Speed selection

7.3.1 Speed selection using the 2-speed gear
switch (SF 144-A) 5
en
NOTE
The mechanical 2-speed gear switch can be used to
select the speed range required. Speed with fully-charged
battery. 1st gear: 0‑380 r.p.m. or 2nd gear: 0‑1440 r.p.m.
7.3.2 Speed selection using the 3-speed gear
switch (SFH 144-A) 6
NOTE
The mechanical 3-speed gear switch can be used to
select the speed range required. Speed with fully-charged
battery. 1st gear: 0‑350 r.p.m., 2nd gear: 0‑1360 r.p.m.
or 3rd gear: 0‑1900 r.p.m.

7.4 Switching on / off

CAUTION
To avoid damage to the power tool, the switch must
be released (switched off) if the motor is stalled for
more than 2-3 seconds. After stalling, the power tool
must be allowed to run for 2 minutes under no load.
The speed of the power tool can be controlled smoothly
(increased from zero to maximum) by pressing the control
switch gradually.
7.5 Drilling
CAUTION
Use clamps or a vice to secure the workpiece. The
workpiece is thus held more securely than by hand
and both hands remain free to operate the power tool.
7.5.1 Fitting the drill bit
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Check that the connection end of the drill bit is
clean. Clean the connection end if necessary.
3. Insert the drill bit in the chuck and then turn the
chuck sleeve until tight.
4. Check that the drill bit is held securely (check by
pulling).
7.5.2 Drilling
1. Move the forward / reverse switch to the "Forward"
position.
2. Turn the torque and operating mode setting ring to
the drilling symbol.
7.5.3 Removing the drill bit
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Open the quick-release chuck.
3. Pull the insert tool out of the chuck.
22
7.6 Hammer drilling (SFH 144-A)
7.6.1 Fitting the drill bit
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Check that the connection end of the drill bit is
clean. Clean the connection end if necessary.
3. Insert the drill bit in the chuck and then turn the
chuck sleeve until tight.
4. Check that the drill bit is held securely (check by
pulling).
7.6.2 Hammer drilling
1. Move the forward / reverse switch to the "Forward"
position.
2. Turn the torque and operating mode setting ring to
the hammer drilling symbol.
7.6.3 Removing the drill bit
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Open the quick-release chuck.
3. Pull the insert tool out of the chuck.
7.7 Screwdriving
7.7.1 Fitting the bit / bit holder
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Insert the bit adapter in the chuck and then turn the
chuck sleeve until tight.
3. Check that the bit adapter is held securely (check
by pulling).
4. Fit the bit in the bit holder.
7.7.2 Screwdriving
1. Set the forward / reverse switch to the desired
direction of rotation.
2. Turn the torque and operating mode setting ring to
the desired torque value.
7.7.3 Removing the bit / bit holder
1. Set the forward / reverse switch to the middle posi-
tion or remove the battery from the power tool.
2. Remove the bit from the bit holder.
3. Open the quick-release chuck.
4. Remove the bit holder from the chuck.
7.8 Reading the charge status LED display on
Li‑ion batteries 7
NOTE
The charge status cannot be indicated while the power
tool is in operation. Indication is given (LED 1 blinks) only
when the battery is fully discharged or when it is too hot
(temperature above 80°C).
The Li-ion battery features a charge status LED display.
The charge status is indicated by the LEDs on the battery
during charging (please refer to the operating instructions