SRD 25
The rock drill is equipped with a throttle lever for
regulating compressed air to the percussion
mechanism and a blower lever for extra blow-
cleaning.
A. Throttle valve closed (stop position)
B. Throttle lever half open
C. Throttle lever fully open
Start and stop
Starting the rock drill
SRD 20
1. Open the main valve for compressed air.
2. Align the rock drill so that the drill steel touches
the required collaring point.
3. Slightly press the start and stop device to
activate SOFSTART, in order to get a good grip
on the surface from the beginning.
4. Collar the hole with reduced feed force.
SRD 20
1. Continue to press the start and stop device all
the way down to activate full power of the
pneumatic rock drill.
SRD 25
1. Open the main valve for compressed air.
2. Align the rock drill so that the drill steel touches
the required collaring point.
3. Move the throttle lever (A) forward a little,
which will start the percussion and rotation.
4. Collar the hole with reduced feed force.
5. Move the throttle lever (A) fully forward once
the drill steel has gained a secure footing in the
rock.
Stopping the rock drill
SRD 20
1. Stop the pneumatic rock drill by releasing the
start and stop device. The start and stop device
will automatically return to the stop position.
Safety and operating instructions SRD 20, 25
16 © Construction Tools PC AB | 9800 1883 01 | 2017-05-31
Original instructions
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