Piston is the American Pneumatic Tool service part carried under part number 1280583034, which replaced the older number 18712. The piston is the striking mass of the scaler; its condition sets impact energy, so scoring, mushrooming, or lost diameter shows up directly as reduced production.
You will find it on the diagram for the 307 & 317 Needle Scaler. The tool itself is the APT 307 Pneumatic Needle Scaler. 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 breakdown index. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 1280583034
- Previous part number: 18712
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18712
- Listed on breakdowns for: 307 & 317 Needle Scaler
