BBC 34WS : Pusher leg rock drill. Silenced. (medium to hard rock) - Atlas Copco USA

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BBC 34WS : Pusher leg rock drill. Silenced. (medium to hard rock)

8311 0303 47

Atlas Copco water flushed, pusher leg mounted rock drills are designed for driving drifts and tunnels with a small cross section. These well-proven rock drills are recognized for their high performance and reliability. They are intended for use for hole diameter range of 27 to 41 mm (1-1 5/8 in)with Hex 22 (7/8") rotation shank as a standard. When used with Atlas Copco tapered button bits, penetration rate will improve some 25-50% compared to conventional integral steels and have three to five times longer service life. The BBC 34 offers exceptional penetration rates in medium to hard rock, thanks to its long stroke and high impact energy.

Features & benefits

  • Silenced
  • Highly efficient in medium to hard rock
  • Long stroke, high impact energy
  • Large piston diameter makes it very efficient even at low air pressure
  • Powerful rifle bar rotation mechanism
  • Pusher leg control placed in back head of the rock drill


  • Production drilling
  • Mining and construction
  • Dimension stone industry

Technical data

Technical Specifications
Rock drill typeUnderground rock drill
Rock drill versionPusher leg rock drill
Weight76 lb
Length30 1/2 inch
Air consumption186 cfm
Impact Rate2280 blows/min
Piston diameter3 1/8 inch
Stroke length2 3/4 inch
Largest reaming diameter2 31/32 inch
Hole diameter1 - 1.6 inch
Vibration level 3 axes (ISO 5349-2)*20.4 m/s²
Sound power level guaranteed, Lw (ISO 15744)*120 dB(A)
Sound pressure level (ISO 15744)* Lp, r=1m109 dB(A)
Shank Size (mm)22x108
Shank Size (inch)7/8x4 1/4
Suitable pusher leg
Pusher leg rock drillALF 71, ALF 71-1, ALF 67/80