The Story of Perfect Circle Piston Rings follows the production of piston rings through several Perfect Circle facilities in Indiana and Canada, showing each step from raw metal to finished parts. Produced by Regan Film Productions of Detroit for the Perfect Circle Company, the film documents how casting, machining, fitting, and inspection were carried out across different plants that supplied the growing U.S. automotive industry.
Our story presents a clear look at how specialized teams in each location contributed to one manufacturing process. Foundry workers, machine operators, and inspectors show how material is formed, shaped, measured, and tested before it becomes a functioning piston ring. Together, the manufacturing plants illustrate the scale and coordination required to meet national demand during the 1950s, when American auto production depended on reliable Perfect Circle Piston Rings made in large volume.
Shot in Kodachrome color, the film provides a detailed record of American industrial ingenuity and the working communities that supported it.
Restored and remastered from 16mm Kodachrome film by Moviecraft Inc.
Enjoy our Playlist "How It's Made" for more exceptional films:
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