This is Atlas Copco part number 3121015400 front head housing, stocked at Crowder Supply as AC-3121015400. It is the business end of the pusher leg it locates the tool steel and absorbs the impact reaction, so bore wear here shows up as a loose, rattling shank.
The published breakdown lists it on the BBC 16W WS Pusher Leg Drill and BBC 34W WS Pusher Leg Drill, and on 1 other machine. Pull up the diagram and confirm the reference number for your serial before ordering.
Everything else on that machine is one page away on the parts diagram library; complete tools are on the Atlas Copco lineup. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3121015400
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121015400
- Listed on breakdowns for: BBC 16W WS Pusher Leg Drill, BBC 34W WS Pusher Leg Drill, BBC 34DSI Rock Drill

