We provide a range of Gummi USA-branded drum style pneumatic clutches and brakes, both constricting and expanding types, in six clutch / brake configurations that are fully interchangeable with all other clutch brands in the market today. The clutch / brake configurations include the FK (CB), FKE (EB), FKR (ER), FM (CM) and FKT (VC).

For more details, or if you would like help to make a size selection for a new or replacement element, please contact us.

Our constricting drum clutches and brakes radially engage the outer edge of the drum when pressurized. The rubber nylon cord-reinforced air tube forces the element’s friction shoe assemblies against the outer edge of the drum. The rate at which the air tube is pressurized directly affects the rate at which the torque increases.

FK

Suitable for a wide variety of general power transmission applications.

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FKT

Principally for heavy-duty applications where extreme clutching and braking is required.

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FM (Marine)

For use on diesel-driven reduction gears where consistent engagement under varying conditions is required.

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LT

Similar to both the FK and FKT, the LT is used primarily on drilling equipment manufactured in China, Russia, and Romania.

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Our expanding drum clutches and brakes expand radially towards the inner edge of the drum when pressurized. The outward expansion of the rubber heavy-duty nylon cord reinforced neoprene tube thrusts friction shoes against the inner edge of the drum. The rate at which the air tube is pressurized directly affects the rate at which the torque increases. Final tube pressure determines the element’s overall torque capacity.

FKE

Essentially an expanding version of the FK, the FKE can be used as a clutch or a brake in applications with light starting and stopping loads.

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FKR

The FKR is similar to a coupling in that it has a neoprene rubber facing that engages the ID of the drum directly without the need for friction material.

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