SYNTEX<sup>®</sup> -NC
  • light weight
  • backlash-free
  • ratched torque limiter design
  • maintenance-free
  • accuracy 10%

Product features

  • Overload system up to 550 Nm

  • Backlash-free and torsionally-stiff

  • Low mass moment of inertia

  • Short reaction times

  • High power density

  • Clamping ring design easy to assemble

  • Available as a ratchet and synchronous design


Sales Torque Limiters
T +49 (5971) 798-0
Engineering Torque Limiters
T +49 (5971) 798-358

SYNTEX®-NC is a backlash-free safety clutch with a low weight and mass moment of inertia. Large bore diameters and a clamping ring design easy to assemble are further characteristics of the safety clutch having extremely compact dimensions. The design is based on a backlash-free, positive locking ball-latching principle allowing for a high repeating accuracy and short reaction times during the overall service life. Main applications are state-of-the-art machine tools, control and positioning technology and special purpose machinery.


Indirect drives:

Direct mounting e. g. of belt pulleys possible (integrated groove ball bearing)

Ratchet design DK

Any engagement after an overload.

Optional ratching in case of overload. After eliminating the overload, the balls engage automatically with the next following ball indentation of the disk spings.

Synchronous design SK

Synchronous engagement after an overload.

After eliminating the overload the rollers automatically engage after a rotation of 360°. Driving and driven side are always placed in the same position to each other.

Information about selection of torque limiters

To make sure that the torque limiter does not yet release with torque peaks related to the process, the switching torque of the coupling should exceed the maximum operating torque by at least 30 % (see diagramme).

Torque limiters and overload systems which re-engage automatically should only be used with a reduced speed for higher release torques. Frequent or longer slipping or ratching increases the wear of the torque limiter.

After the torque limiter has disconnected driving and driven side in case of overload, it may take some time before the drive comes to standstill because of a high inertia in the drive train. This may cause higher wear on the torque limiter and the overload system re-engaging automatically. That is why we recommend the use of the overload system KTR-SI as an idle rotation type for drives with big inertias or with higher speeds.

We basically recommend electronic monitoring of the torque limiters in order to protect the drive in case of overload.

We will be pleased to support you with technical questions and with the selection of torque limiters. For that purpose we dispose of the latest simulation and calculation programs. Here the following fact applies: The more detailed the data, the more accurate are the calculation results.