Unintended Car Movement (UCM) is a significant risk for elevators. Defective central electric or mechanical components can lead to the cabin unexpectedly moving out of the landing position, causing severe accidents. For this reason, a UCM protective system has been mandatory for all elevators entering the market after 1 January 2012.

Since every elevator installation is subject to the operational safety regulation, which prescribes the operation of an elevator installation according to the current state of the art, the retrofitting of a UCM protection system is also recommended for elevators that were put into operation by 2011 December 31. With the retrofitting of our UCM solution, a significant improvement in safety for users and maintenance personnel is achieved. In addition, with this measure, the operator of the elevator system complies with the official requirements.

“Elevator operators are faced with the task of regularly questioning the safe operation of their elevators. This is the only way to identify the hazard potential and to assess the liability risk.”

If an accident occurs in an elevator system, which could have been prevented by the current state of the art, the operator of the elevator system will inevitably be held liable.

A UCM solution can be certified as a system or can be composed of tested components. The UCM System must detect an unintentional movement of the car, stop the car and hold it in the stopped position. Furthermore, lifts with traction sheave drives must be equipped with protective devices against overspeed for the upward-moving car.

With the FUKA safety brakes according to EN81, we offer you user-friendly options for retrofitting and initial equipment.


The FUKA main shaft-mounted brake is an electromagnetic “power to release” safety braking system, which is approved as protection against unintentional movement of the car (UCM) and as protective devices against overspeed for the upward-moving car.

The powerful FUKA shaft brake ensures that the cabin safely stopes in an emergency case by its power to release spring accumulator. Thanks to the high degree of configurability of the brakes, Elevators with loads of 300kg - 3500kg (base suspension 1: 1) can be equipped with FUKA shaft brakes. Please do not hesitate to contact us for applications that differ from this.

The braking system is designed with a gearbox or system-dependent adaptation and is prepared to be mounted in front of the traction sheave or in front of the outer bearing or on the shaft end opposite the traction sheave, according to each local situation. In addition to the function of the brake, the focus of the design is always on the easiest possible assembly on site. Assembly aids and a Gearbox or a system-dependent installation manual are part of the standard scope of delivery.

The robust construction with few moving parts and pivot bearing is concept compensates for small assembly inaccuracies. Adjustment work on the brake itself is not required after the assembly.

Regardless of the points mentioned above, we offer complete mechanical and electrical assembly on site, carried out by selected partner companies in parts of Europe, as an additional option.

Scope of delivery:

The safety brake is delivered completely ready for installation and consists of the following parts:

  • safety brake (manufactured by Mayr® Antriebstechnik)
  • fast acting rectifier
  • mounting bracket including accessories (system-dependent designed and manufactured)


  • A3-modul (controller)
  • A3-detection (Sensors + magnetic tapes with fastening set)
  • double-acting Overspeed governor
  • complete mechanical and electrical on-site assembly

Advantages over other systems:

  • easy installation on the gear unit without major adjustment work
  • Drive-specific mounting bracket
  • high braking performance
  • high configurability
  • free from regular maintenance
  • consistently low noise level

available performance sizes:

600 - 5500 Nm braking torque.
corresponds to approx. 300kg - 3,500kg load capacity for 1:1 installation

Basis information (extract from DIN EN81-20):

In the case of elevators without retraction, readjustment and preparatory measures with open doors according to and in which the braking element is the engine brake according to and, there is no need to detect the unintentional movement of the car. In these cases, UCM detection and calculation of the stopping distance are not necessary.

Basis information:

According to EN81-20, a safety brake should not be connected to the traction sheave shaft on winches with three-point bearings. Thanks to our special ball-bearing concept, there are no additional transverse forces on the shaft, as was previously the case with comparable solutions from other providers.

The use of the FUKA main shaft brake at drives with three-point bearings should always be clarified with the responsible notified body in advance. Every already carried out projects on gearboxes with three-point bearings were done with approval and successful individual acceptance by the responsible notified body.


For some individual cases, the FUKA Traction sheave brake offers a cost-effective retrofit solution for small passenger elevators with low loads.


We provide type-tested dual-circuit brakes as project-specific solutions for gearless drives in existing elevators. With this product you meet the requirements of UCM and – combined with other parts – protect the upward moving elevator against overspeed according to DIN EN81. In comparison to other solutions like rope brakes for example, type-tested dual-circuit brakes are a cost-effective alternative, thanks to very low operating and maintenance costs.


  • FUKA handles the project in cooperation with TÜV Rheinland
  • Simultaneous modernisation of the single-circuit brake
  • No additional braking device required
  • Easy to assemble
  • Negligible maintenance costs

Have questions about our products and their fields of application? Contact us!

Your Contact

Frank Eßer
Phone: +49 221 539958 19
E-mail: frank.esser@fuka.de