Torque Tubes

Alternatively, a torque tube can be hung rigidly from 4 crane trolleys. In this case, the torque tube can withstand overhung loads in any direction and does not have to be hinged. A carriage supports the torque tube and usually runs along 2 bridges, which in turn are supported by 2 runways.

Sometimes it’s necessary to hang a nutrunner from a crane in order to achieve large travel distances. In this situation, a torque tube is used instead of a torque arm. A vertical slide floats the nutrunner, suspended from a balancer or an air cylinder.

Usually a torque tube hangs from 2 trolleys on a bridge or monorail. In this situation, hinge pivots have to be provided to avoid applying a moment to the trolleys.