Atlas Copco BBD 12D Prescriptions De Sécurité Et Instructions Pour L'opérateur page 13

BBD 12D, 12DS, 12DCS
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
Atlas Copco Rock Drills BBD 12D, BBD 12DS and
BBD 12DCS are designed for horizontal drilling, plug
hole drilling and drilling in concrete in 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
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.
© 2015 Construction Tools PC AB | No. 9800 0713 90d | 2015-10-07
Original instructions
Rotation Flushing
Safety and operating instructions
Rotation mechanism
Impact stroke
The drill steel is turned slightly with each blow by the
ratchet wheel 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.
Main parts
A
B
G
BBD 12D, BBD 12DS
Return stroke
D
E
F
C
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