Hilti ST 1800-A22 Manual De Instrucciones página 27

2. The speed of the power tool can be controlled
smoothly (increased from zero to maximum) by
pressing the control switch gradually.
3. To switch the tool off, release the control switch.
7.5 Pressure transfer surface
The pressure transfer surface allows the user to apply
higher pressures to the power and screw, thereby op-
en
timizing drilling and screwdriving. It makes the tool less
tiring to use.
Apply pressure to the pressure transfer surface with your
other hand when drilling and screwdriving.
This will significantly reduce the load on the hand and
arm holding the tool.
7.6 Lockbutton for sustained operation
NOTE
The lockbutton for sustained operation allows the motor
to run continuously without need for constant pressure
on the control switch.
7.6.1 Switching on in sustained operating mode
1. Press the control switch fully.
2. While maintaining pressure on the control switch,
press the lockbutton and then release the control
switch.
7.6.2 Switching off after sustained operation
Press the control switch. The lockbutton returns to its
original position.
7.7 Guard 6
When the depth gauge is not fitted, the guard protects
the depth gauge holder from dirt and damage.
Fit the guard by pushing it onto the tool from the front.
Remove the guard by pulling it away from the tool.
7.8 Depth gauge
Attachment for correctly fastening screws which have a
sealing washer.
Use a depth gauge suitable for the diameter of the sealing
washer (accessory).
By adjusting the depth gauge, the screw seal can be
correctly press-fitted.
7.8.1 Fitting the depth gauge 7
1. Pull off the guard.
2. Push the depth gauge onto the tool from the front.
7.8.2 Adjusting the depth gauge 8
7.8.2.1 The screw is pressed too tightly against the
surface.
Turn the depth gauge to the right.
7.8.2.2 The screw is not pressed tightly enough
against the surface.
Turn the depth gauge to the left.
22
Compression of the screw seal is increased.
7.8.3 Removing the depth gauge 7 6
Pull the depth gauge forward, away from the power tool.
Refit the guard to protect the tool.
7.9 Changing screwdriving accessories 9
NOTE
The chuck has a ¼" hexagon socket drive for various
screwdriving accessories (bit holders, bits, etc.). This is a
standard size (DIN 3126/ISO 1173).
1. If a depth gauge is fitted, pull it off forwards, away
from the power tool.
2. Pull the sleeve of the chuck forward and hold it
securely.
3. Pull the screwdriving accessory out of the chuck
and replace it with the desired accessory.
4. Release the sleeve and allow it to return to its original
position.
The screwdriving accessory must be held securely
in the chuck.
5. Check that the screwdriving accessory is held se-
curely.
6. If necessary, refit the depth gauge on the tool.
7.10 Removing a previously-driven screw
1. Remove the depth gauge or screw guide by pulling
it forward, away from the power tool.
2. Set the forward / reverse switch to the reverse
rotation position.
3. The screw can then be removed.
7.11 Using the screw guide
We recommend use of the ST-SG 5.5/6.5 screw guide
(accessory) when driving sandwich panel screws.
7.11.1 Fitting the screw guide 10
1. Remove the guard or pull the depth gauge forwards
away from the power tool.
2. Insert the screwdriving socket in the chuck.
3. Push the screw guide onto the tool from the front
until it is heard to engage.
7.11.2 Removing the screw guide
1. Pull the screw guide forward firmly, away from the
tool.
2. Refit the guard to the tool or fit the depth gauge.
7.12 Reading the charge status LED display on
Li‑ion batteries 11
NOTE
The charge status cannot be indicated while the power
tool is in operation. If LED 1 blinks, this simply indicates
that the battery is either fully discharged or too hot for
use (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