Valve Spring carries BTE Mid-Western part number H8118S and is stocked here under GD-H8118S. This is a spring element it returns or preloads the mechanism, and its free length and rate determine whether the assembly cycles correctly.
Crowder’s breakdowns list this part on the RB83A Stoper Drill.
Use the parts diagram library to work through the rest of the assembly, or the BTE Mid-Western tool range if you are pricing a replacement machine. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: H8118S
- Manufacturer: BTE Mid-Western
- Crowder SKU: GD-H8118S
- Listed on breakdowns for: RB83A Stoper Drill

