About

MMC RYOTEC CORPORATION (then OTE Kosan CO., Ltd.) was established in 1958 as a group company of Mitsubishi Materials Corporation (then Mitsubishi Metal Mining CO., Ltd.). MMC RYOTEC has been a long-time manufacturer of cemented carbide tools. In 2000, the development and manufacturing departments of wear-resistant tools and rock tools were transferred from Mitsubishi Materials Corporation to our company. Since then, we have cultivated carbide material development technologies and tool design ideas..

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