Penn Machine Company, a Marmon/Berkshire Hathaway company, is a major supplier of heavy-duty OEM and aftermarket components for the transit, railroad, mining, steel, construction and general industries. Our business is both domestic and international in scope. PMC product lines include carburized and hardened gears and pinions, resilient and solid transit wheels, axles, wheelsets, and gearbox remanufacturing. The company is a major supplier of traction gearing to the world's railroads. Our carburized and hardened Super Gear is now recognized as the standard in the railroad industry. PMC is the manufacturer of the original PCC resilient wheel and a licensee of Bochumer Verein Verkehrstechnik for their state-of-the-art transit wheelset technology.