Viscosity rotary oscillation dampers

1) Viscosity rotary oscillation dampers

Visco-Dampers reduce rotary oscillation by the elastic and/or damping combination of secondary mass (gyrating ring) and primary mass (housing)

2) Visco-Dampers with decoupled pulley

The Visco-Damper with decoupled pulley provides a compact solution for decoupling rotary oscillation between crankshaft and pulley while simultaneously reducing rotary oscillation in the crankshaft.

Hydraulic Dampers


The HYDROLASTIC damper reduces rotary oscillation in accordance with the hydrodynamic extrusion principle. Rotary oscillation causes a relative motion in the damper between the primary mass (hub) and secondary mass (housing). As a consequence of this relative motion, mineral oil is pressed through a narrow slot. The resulting drop in pressure equates to a hydraulic drop in power, which has a damping effect.

Dampers produced by Knorr-Bremse’s subsidiary, HASSE & WREDE, reduce rotary oscillation in crankshafts, camshafts and fuel pumps; they reduce noise and ensure long engine life.

Systems for Commercial Vehicles

We are looking forward to hearing from you.


Hasse & Wrede CVS Dalian, China Ltd.

Automobile Parts Industrial Park, Block No. 48, Economic & Technological Development Zone, Dalian, 116620, P.R. China

Tel.: + 86 411 87545923

Fax: + 86 411 87545950

E-Mail: Tinghai.fang@knorr-bremse.com


Further information


Viscosity rotary oscillation dampers