Ordering by number: this is 3121057500, the Atlas Copco adaptor. It joins the hose to the machine. Connection hardware gets dragged, dropped, and cross-threaded, so it is a common replacement.
Crowder’s breakdowns list this part on the BBD 94W 94WS 94WE Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
Use the full diagram library to work through the rest of the assembly, or the Atlas Copco lineup if you are pricing a replacement machine. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 3121057500
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121057500
- Listed on breakdowns for: BBD 94W 94WS 94WE Rock Drill
