Overhaul and Supply of TBM rotating head planetary drives

We have recently carried out revamping operations of n. 11 planetary drives for Tunnel boring Machine, for one of our leading customers in the construction of tunnel drilling machines. (TBM).

We have supplied to the end customer, 11 planetary drives completely refurbished, sized for a nominal torque of 170 kNm, in a strong structure suitable for heavy duty and equipped with water recirculating chamber for oil cooling. TBM slow head driving pinions, module 25 mm, carburized hardened and with ground tooth profile. The weight of each planetary drive is 2,980 kg.

Regarding the revamping operations performed on the individual drives: we carried out the dimensional checks to establish wear and deformation, the non-destructive checks to check the condition, using qualified operators, very high precision instrumentation, and a ZEISS MMZ-G 30 60 25 checking machine. To complete the overhaul of each planetary drive, we performed the functional test with measurement of temperatures, noise, vibrations, with the release of the relative test report.

The “Certification Dossier” is supplied together with the materials and tests certificates and the drives final testing report.

The following photos show the various revamping and testing steps of planetary drives.