Frictionless Braking Is Possible
The Posidyne oil-shear clutch brakes from Force Control (Fairfield, OH) transmit torque between two lubricated surfaces, which eliminates wear and dissipates heat. Because there is no direct contact between the friction surfaces during acceleration or deceleration, there is no need for adjustment or replacement of discs, according to the company. The Posidyne brakes also use a fluid recirculation system that helps dissipate heat while continually lubricating all components, which extends the service life. According to the company, all of these benefits make the brakes ideal for environments with difficult elements, including moisture, dust, or dirt.
Check out www.forcecontrol.com  to get more details on the clutch brakes.