In traction lifts, the cage and counterweight are suspended on hoisting ropes that run through grooves in the traction sheaves. The weight of the cage is lighter than the counterweight, so less energy is required to move the lift.
Friction between the lifting cables and the grooves of the traction sheave causes the cage to move up or down. As soon as the counterweight or the cage lands on its buffers in the shaft pit, the pressure on the lifting cables is relieved and the machine starts to slip. The buffers ensure that the lift can never run far beyond its top or bottom stop.
In addition to lift ropes from our supplier Pfeifer Drako/Gustav Kocks, we also supply traction discs from Rudolf Fuka GmbH.
Fuka supplies standard products as well as custom-made products. This is also particularly suitable for service work on older lifts: discs are manufactured using styroform templates, based on sheaves that are no longer available elsewhere.