GMN offers two different spring systems which maintain a constant friction contact between sprags and the connecting parts.
The GMN tension spring is an annular spring that encompasses all of the sprags and provides them with a collective spring tension. The spring force per sprag is slightly less than that of a meander spring. This results in a longer service life in idle. The max. indexing frequency is fmax = 10 Hz.
A 3-dimensionally bent spring that spring-loads each sprag separately (individual springing). The structural characteristics of this spring increase transferable torque by about 10 % (in comparison to tension springs) because maximum sprag contact surface is achieved. The max. indexing frequency is fmax = 60 Hz.