This is Atlas Copco part number 3121076780 piston – complete, stocked at Crowder Supply as AC-3121076780. Impact energy comes from this part accelerating down the bore. Wear on the strike face or the seal lands costs blow energy before it ever causes a hard failure.
It appears on the BBC 34DSI Rock Drill and BBC 34W WS Pusher Leg Drill breakdown. Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
Everything else on that machine is one page away on the parts diagram library; complete tools are on the Atlas Copco catalog. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3121076780
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121076780
- Listed on breakdowns for: BBC 34DSI Rock Drill, BBC 34W WS Pusher Leg Drill
