• Self-centring
  • No axial movement of the hub during mounting
  • Standard versions for torque range from 26,000 Nm to 3,272,000 Nm
  • Standard versions for shaft diameters from 100 mm to 480 mm
  • Quick mounting


Clean the contact surfaces of the shaft and hub. Push the shrink disc onto the hollow shaft. Gradually tighten the clamping screws in steps to the indicated tightening torque MS in a clockwise direction with a torque spanner. Several screwing processes are necessary in order to reach the indicated tightening torque.

Caution: Do not use oil containing molybdenum disulphide or extreme-pressure additives and do not use grease. The coefficient of friction would otherwise be considerably reduced.


Loosen all clamping screws uniformly in a clockwise direction, but do not screw them completely out of the thread. The shrink disc usually comes off automatically. If the shrink discs are to be used again, lubricating grease must be applied to the screws and the conical surfaces. The lubricating grease must guarantee a coefficient of friction of 0.04.

Tolerances, roughness depth

A good turning procedure is sufficient.

Maximum permissible tolerances:

  • f7 for the outer diameter of the hollow shaft (catalogue value d)
  • Maximum permissible roughness depth: Rt max. 16 µm (Ra 3 µm - Rz 13 µm)

Tolerances for shaft diameter dW:

  • H7/h6 for shaft diameters up to 150 mm
  • H7/g6 for shaft diameters from 155 mm

TLK623 series clamping screws DIN 931 10.9