This is the Atlas Copco pressure spring part number 3121090100, Crowder SKU AC-3121090100. Springs in a rock drill fatigue with cycle count rather than age, so a control that has gone lazy or fails to return is usually this part rather than the component it drives.
It shows up in the parts breakdown for the BBD 94W 94WS 94WE Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
The parts diagram library indexes every breakdown we publish, and the Atlas Copco tool range has the tools these parts go into. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3121090100
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121090100
- Listed on breakdowns for: BBD 94W 94WS 94WE Rock Drill
