Friction couplings protects a mechanical drive from damage when the permissible torque is exceeded (safety clutch). The slipping torque is steplessly adjustable. These couplings are available with plates or coil springs.

The gear shown is not included in the delivery, but can be supplied on request.

Technical data - Friction coupling

Technical data


RKSK 2020

RKTK 2020

    spiral spring plate spring
max. speed min-¹ 50 40
torque adjustable Ncm max.30 max.120
moment of inertia gcm2 8,4 7
max. clamping torque Ncm 100 100
temperature range °C -10/ +50 -10/ +50
weight appr. g 20 23
material flange 9SMnPb28 black finished  
clutch lining Nylatron    

Bore size

d RKSK 2020 RKTK 2020
4 x x
5 x x
6 x x


To download the step file, please select the required bore combination.

Technical drawings