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China rolls out the world's largest shield TBM main bearing

    Caihong Wen
    By Caihong Wen Replies (1)

    World's largest Tunnel Boring Machine (TBM) main bearing in Changsha, central China's Hunan Province.

    Diameter is 8.61 meter. It has power to drive a TBM of diameter 18 meter.

    It has high precision. A flatness of less than 20 micrometers within an 8 meter pipe.

    In past west tried China stop to make large TBM. West did not sell large main bearings.

    https://english.cctv.com/2023/10/16/VIDEUZZaH9qYt0EkTuCvZo1H231016.shtml

     

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