We are a heat treatment company that responds to our customers' diverse needs with our unique system.

Toshin Heat Treatment Co., Ltd. is a heat treatment company that specializes in the heat treatment processing of steel materials and components. Its main products include bearing components for construction machinery, automobiles, motorcycles, industrial machinery, machine tools, and wind turbines. The company offers a wide range of processing services, including gas carburizing quenching and tempering, gas carburizing nitriding quenching and tempering, non-oxidizing quenching and tempering, quenching and tempering of raw materials, annealing, spheroidizing, and gas soft nitriding, as well as quenching and tempering of large bearing components.

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