Our superior drive technology with gerotor principle is based on a strong forged drive shaft made of special steel and withstands the highest bending moments.
Hydraulic rotators for cranes and gripper arms
Hydraulic rotators for excavators and construction machinery
Hydraulic rotators for special applications
Every hydraulic rotator available on the market can be replaced with an AVS rotator with identical mounting dimensions. We are happy to help you find the right type!
Our low-wear control system allows a long service life at compact dimensions and common connection dimensions.
AVS rotators offer a powerful, slow and smooth start-up and, thanks to the construction-related positioning brake, also a smooth braking behavior.
Our rotators offer high bending moments and, thanks to tapered roller bearings and double-bearing drive shafts, also enormous radial and axial load capacities.
Extrem resistant, twisted and hydrolysis resistant special seals ensure smooth operation over a wide temperature range.
Each AVS Rotator runs on the G-Rotor Principle (hydraulic rotator with toothed washer construction). The interaction of a three-way driving unit with a double distributor-valve function, bypass valves and proportionally adjustable pressure compensation valves makes up the innovative drive of the rotator. Gear teeth ensure a positive connection between rotor and shaft. The rotor has an external gear. Pressure chambers arise from the interaction between this external gear and the internal gear of the rotor ring. Distibutor plates are on both sides of the rotor. The distributor plates run the rotor. Due to the distributor plates the pressure chambers are alternately filled and emptied. The distributor plates in turn are filled and emptied by the connections.
Due to the displacement principle the rotor ring is moved eccentrically over the rotor. The rotor ring rolls away over the rotor housing and consequently generates a torque. As a result the rotor turns. The force of the distributor plates, witch acts on the rotor, is adjusted by proportionally adjustable pressure compensation valves. In that way wear is reduced to a minimum and durability is highly increased. Due to the inversion of the flow direction the direction of the rotation changes. In order to put the AVS-Rotators to the best possible use an operating pressure from at least 180 to a maximum of 320 bar.