Springs

GMN offers two different spring systems which maintain a constant friction contact between sprags and the connecting parts.

Tension spring

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.

Series with tension springs:

  • Freewheel clutch insert elements: FE 400 Z, FE 8000 Z
  • Freewheel clutch insert elements with rings: all series
  • Ball bearing freewheel clutches: all series
  • Complete freewheel clutch units: all series
FL_KO_FE_2_550x550
Tension spring 
FL_KO_FE_1_550x550

Meander spring

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.

Series with meander springs:

  • Freewheel clutch insert element: FE 400 M
  • Freewheel clutch insert elements with rings: all series
  • Complete freewheel clutch units: all series
FL_KO_FE_4_550x550
Meander spring 
FL_KO_FE_3_550x550

Spring system according to type of use

  • Overrunning clutch: Meander or Z spring
  • Backstop: Z spring
  • Indexing clutch: Meander spring

 

 

 

FL_KO_FE_5_550x550
Backstop in a revolving door 
FL_KO_FE_6_550x550
Overrunning clutch on E-Bikes