KTR Sverige AB Ritarslingan 7 18766 Täby T: 08/625 02 90


SYNTEX<sup>®</sup>-NC with TOOLFLEX<sup>®</sup>
  • light weight
  • backlash-free
  • ratched torque limiter design
  • maintenance-free
  • accuracy 10%
  • 90 degree max. operating temperature
  • absorbs axial misalignment
  • absorbs radial misalignment
  • absorbs angular misalignment

Product features

  • Overload system in combination with the torsionally-stiff, backlash-free TOOLFLEX®

  • Able to compensate for displacements

  • TOOLFLEX® with a frictionally engaged clamping hub or taper hub

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.

Show specifications

SYNTEX®-NC with TOOLFLEX® Application

A typical application for SYNTEX®-NC in combination with TOOLFLEX® are backlash-free worm gears with low transmissions. The stiffness of the coupling needs to be converted due to the gear transmission from the driving side to the driven side.

In this case the transmission itself has a decisive influence, since it is included in the calculation with a square configuration. The stiffness converted is added up in series with the gearbox stiffness in order to find out the overall stiffness. With transmissions falling below i = 8 we recommend to use TOOLFLEX® as a flexible coupling subject to the loss of stiffness of the overall system.

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.