Pulvis clutch

Pulvis clutch


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Pulvis-Kupplung Pulvis clutch              


starting clutch for electric motors



at rest
at startup/
Pkg1 Pkg2 Pkg3


The PULVIS clutch has been used to assist electrical squirrel-cage motors in accelerating larger machines such as crushers, grinders, blowers, textile machines, conveyer systems etc. for many decades.

In addition, the PULVIS clutch provides automatic protection against overloading and compensates surge loading through smooth slip.

When the motor is started up, the PULVIS clutch turns and accelerates the machines slowly and smoothly up to nominal rotational speed.

In normal operation PULVIS clutches operate:

  • WITHOUT slip
  • WITHOUT loss
  • WITHOUT heating
  • WITHOUT wear and
  • WITHOUT noise

The friction element, PULVIS powder, can be changed simply, without dismantling the clutch.

Perfect functioning is only guaranteed with the "Original PULVIS Powder" specially developed by us!

Operating range: 2 to 2000 kW
                                 300 to 3000 rpm.

For extremely high switching frequencies: Maintenance-free versions with roller bearings using the special YGL quality powder.

Many industrial operations and engineering works use


to protect their motors, gears, belts, machines, electrical components etc.

PULVIS clutches are available as shaft-, flat belt pulley and V-belt pulley clutches.

Here you can find further information on the characteristics and the spare-parts of the PULVIS clutches.

For more information on PULVIS clutches, please contact us, we would be happy to advise you! 

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Widerhofergasse 4/7

1090 Wien - Austria

+43 1 317 32 26