• Starflex


The jaw coupling design has been used as a versatile application option, delivering a robust design and dampening features. The simple construction effectively sandwiches the centre of the shaft coupling using an element (or spider; made of polyurethane elastomer) between two hubs. The Elements are available in two different hardnesses so that a selection dependant on torque transmission responsiveness and amount of misalignment can be made. The polyurethane elastomer used in the element enables double the torque transmission of our previous jaw coupling (Miki Pulley comparison) and since the design pre-compresses the element, it can also be used to deliver rotation without backlash. Aluminum alloy is used as the hub material. The hub may be coupled to the shaft either by key way or by integral clamp.



The jaw coupling convinces by its versatile application options, robust design and damping features.

  • Equalizes offsets in the event of shaft misalignment
  • Secure transmission of °torques
  • Damping capabilities in the event of resonance problems
  • High torsional stiffness
  • Large variety of mounting options


  • Element: 90 to 97 JIS A
  • RoHS-compliant
  • 1.2 to 1050 Nm
  • Good resonance damping
  • Zero backlash