Ordering by number: this is R278008, the Chicago Pneumatic retainer ring. It holds the working steel in the rock drill. Retention hardware is a wear and safety item a stretched or cracked retainer lets the steel move, which chews the front head.
It is called out in the parts diagram for the CP 9RR 9RRS 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 full diagram library. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: R278008
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-R278008
- Listed on breakdowns for: CP 9RR 9RRS Rock Drill
