Ordering by number: this is 3121075600, the Atlas Copco rifle bar bearing. Rotation components on a rock drill take a load impulse on every blow, so they are wear items with a predictable service life.
You will find it on the diagram for the BBC 34DSI Rock Drill and BBC 34W WS Pusher Leg Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
Everything else on that machine is one page away on the parts diagram hub; complete tools are on the Atlas Copco lineup. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3121075600
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121075600
- Listed on breakdowns for: BBC 34DSI Rock Drill, BBC 34W WS Pusher Leg Drill
