China’s CRCC claims to have manufactured world’s biggest TBM main bearing

CRCC's extra-large TBM main bearing as viewed from above CRCC’s biggest TBM main bearing yet has a diameter of 8.61 metres (Image: CRCC)

Chinese construction company China Railway Construction Corporation (CRCC) claims to have produced the world’s biggest main bearing for a tunnel boring machine (TBM).

The bearing has a diameter of 8.61 metres, making it as tall as a three-storey building.

CRCC said it could be used to drive super-large-diameter TBMs of 18m in diameter and withstand over 10,000 tonnes of load.

It claimed that production of the bearing meant that China could stake its claim to be a world leader in the field of extra-large diameter main bearings.

In a statement, the company said, “CRCC’s project team has finally overcome manufacturing difficulties through hundreds of experiments with various processes and materials, enabling the bearing to have a long service life and high manufacturing precision.”


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Andy Brown Editor, Editorial, UK - Wadhurst Tel: +44 (0) 1892 786224 E-mail: [email protected]
Neil Gerrard Senior Editor, Editorial, UK - Wadhurst Tel: +44 (0) 7355 092 771 E-mail: [email protected]
Catrin Jones Deputy Editor, Editorial, UK – Wadhurst Tel: +44 (0) 791 2298 133 E-mail: [email protected]
Eleanor Shefford Brand Manager Tel: +44 (0) 1892 786 236 E-mail: [email protected]