Multi-disc tension control brake
Positorq® FORCE CONTROL

The Positorq® brakes use multiple disc oil shear technology with a continual supply of cooling and lubricating fluid like all other Force Control units. The main difference is that the Positorq® Brake is a constant slip device. It is normally force lubricated for smooth accurate torque control over the entire speed range, even to 0 RPM. Tension torque is transmitted through the viscous shear of the fluid between the friction surfaces.

Torque is proportional to air or hydraulic pressure supplied to the piston. Teflon piston liners produce smooth controllable piston movement for precise control and quick brake response.

Web tension control and dynamometer (dyno) brakes are essentially energy absorbers. Rotary motion is transformed through the brake to heat, so a critical function of the brake is its ability to dissipate heat. In the Positorq® brake, fluid is pumped through the brake shaft to furnish a continuous supply of fluid between the friction surfaces. The fluid lubricates the surfaces at the point of engagement, and removes engagement heat. The fluid is then circulated through a cooling unit and cooled fluid is returned to the Positorq® brake.