Piston Ring Capabilities

Precision rings, inc. is a custom manufacturer of piston rings.  Precision rings manufactures piston rings and seal rings for many different applications and a variety of industries.  Precision Rings manufactures large diameter rings and metallic rings from a variety of materials, most commonly utilizing the “Super Alloys”; metallics with high Nickel and high Cobalt content.  Check out the materials page to see a list of the more common materials used to manufacture piston and seal rings. Please note this list is not exhaustive. Contact us to inquire about manufacturing large diameter rings with a particular material if it is not listed. 

Manufacturing Large Diameter Rings

Precision rings incorporated has the capability to design rings or manufacture from an existing print. We manufacture rings with different gap configurations and different ring types based on the application requirements. Precision manufactures rings as small as 0.200 of an inch in diameter or large diameter rings over 100 inches.

PRI is ISO 9001:2015 + AS9100D and Nadcap approved (heat treatment).

Heat Treat

  • Furnaces: 2250°F (1232°C)
  • Deep Freeze: -100°F (-73°C)


  • CNC Lathes
  • Accuracy +/- .0002
  • CNC Machine Centers
  • Repeat Accuracy: +/- .0002
  • Vertical Turret Lathe
  • Accuracy: +/- .0005


  • O.D. and I.D. Accuracy: +/- .0002
  • Blanchard Accuracy:  +/- .0004


  • Repeat Accuracy: +/- .0002

Coordinate Measuring Machine

  • Accuracy: +/- .0002

Contact Precision Rings for Piston and Seal Rings

Contact us for more information regarding our large diameter rings, or request a quote today. We are a leading custom manufacturer of piston rings.

©2021 Precision rings incorporated - 5611 Progress Road - Indianapolis, Indiana 46241
Phone: 317-247-4786