Overview
To reduce the risk of serious injury or death to
yourself or others, read the Safety instructions
section found on the previous pages of this
manual before operating the machine.
Design and function
SRD 20 and SRD 25 are pneumatic rock drills
designed for vertical drilling, plug hole drilling and
drilling in concrete for construction and mining
applications. No other uses are permitted.
To choose correct insertion tools, contact your
local Atlas Copco dealer.
Working principle of a rock drill
Impact Feed force Rotation Flushing
Control valve mechanism
The valve directs the air alternately from one side
to the other of the piston so that it moves up and
down. The piston transmits the energy through the
drill steel to the bottom of the hole.
Rotation mechanism
Impact stroke Return stroke
The drill steel is turned slightly with each blow by
the rifle bar rotation. The rotation is anti-clockwise
and is applied on the return stroke of the piston.
Flushing
Flushing is ducted through a hole in the piston.
This means that flushing air is provided as soon as
the compressed air is switched on.
SRD 20, 25 Safety and operating instructions
© Construction Tools PC AB | 9800 1883 01 | 2017-05-31
Original instructions
11
To Next Page
Loading...
Need help?
General
