Tunneling machines


Well-developed road and rail networks are an essential requirement for a sound and efficient infrastructure in any country.

Thus, the tunneling machinery field within the heavy machine construction industry will have plenty of contracts in the coming years. ST safety couplings by R+W have been integrated in the latest generation of tunneling machines. On the drive end, the connection is established between the safety coupling and the engine via a motor shaft with DIN 5480 standard gearing. On the output end is a flange-mounted gear which drives the cutter head over the toothed inner bearing ring of the tunneling machine.

A total of 12 drive units are installed in the machine. On the one hand, a very high and uniform transfer of torque can be ensured as a result. On the other, the risk of breakdown is minimized and costly downtimes are avoided. In the event of an overload, the balls move out of the domes axially to cause positive separation so that damage to the individual cutter heads is prevented. Thus, in the event that one or more units fail, tunneling continues with no downtime.

R+W also offers these heavy-duty safety couplings for non-accessible applications with automatic re-

R+W  Solutions for Tunneling machines