Chuck – 7/8 X 4-1/4″ Hex, American Pneumatic Tool part number 1280583534, previously 03552, listed at Crowder Supply as APT3552. Retaining the tool steel is its whole job. Worn retention lets the shank hammer against the bore and turns a cheap part into an expensive front head.
Crowder’s breakdowns list this part on the 137 Rock Drill. The complete machine is the APT 137 Pneumatic Rock Drill. Compare it to the reference callout on the diagram to be sure it is the position you need.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts diagram library. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 1280583534
- Previous part number: 03552
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT3552
- Listed on breakdowns for: 137 Rock Drill
