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Verfügbare Sprachen
Verfügbare Sprachen
BBC 16W, 16WS, 34W, 34WS
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 BBC 16W/WS and BBC 34W/WS pusher
leg rock drills are water-flushed and intended for air
pressures of 4–6 bar. The pusher leg rock drills have
been designed for the following operations:
BBC 16W/WS and BBC 34W/WS are used in many
construction and underground mining applications.
They are allround pusher leg rock drills, suitable for
medium and hard rock formations. No other use is
permitted.
The pusher leg support helps the operator to lift and
feed the rock drill during the drilling operation. The
pusher leg control is located in the back head of the
rock drill.
The machines are intended to be used together with
pusher legs BMT 51, ALF 71, ALF 71-1, or ALF
67/80.
The pusher leg rock drills have water flushing and a
robust rifle bar rotation mechanism. The pusher leg
rock drills are equipped with a chuck bushing for a
22 mm x 108 mm, hexagon shank. The rock drills
are equipped with a 25 mm (1 in.) connection for air
and a 12.5 mm (
1
⁄
in.) connection for water.
2
To choose correct insertion tools, contact your local
Atlas Copco dealer.
Working principle of a rock drill
Impact
Feed force
© 2010 Atlas Copco Construction Tools AB | No. 9800 0627 71 | 2010-03-16
Original instructions
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Rotation
Flushing
Safety and operating instructions
Control valve mechanism
BBC 16W/WS
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
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 two concentric tubes, the
outer one for air and the inner one for water. This
means that flushing air is provided as soon as the
compressed air is switched on. The purpose is to
prevent water from entering the percussion
mechanism of the rock drill.
BBC 34W/WS
Return stroke
13
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