This is Atlas Copco part number 3111000400 spring, stocked at Crowder Supply as AC-3111000400. It supplies the return force for its assembly in the rock drill. A spring that has taken a set gives soft or sticky action long before it actually breaks.
You will find it on the diagram for the BBD 12D DS Rock Drill. Pull up the diagram and confirm the reference number for your serial before ordering.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts diagram hub. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3111000400
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3111000400
- Listed on breakdowns for: BBD 12D DS Rock Drill
