Auto-Diesel Piston Ring Co.

Auto-Diesel specializes in the manufacture of piston rings for industrial uses such as hydraulic and pneumatic applications and stainless steel plunger rings for the zinc die casting industry.

We manufacture cast iron rings from 1" to 30" in standard diameters as well as oversize and metric diameters. We also offer piston rings in aluminum bronze for those special requirements. ALL cast iron...