Gummi Air Clutch & Drum Brake - Type FK

Brand: Gummi
Code: Gummi FK

Industrial Clutch Parts Ltd. supplies a complete range of Gummi Drum Clutches and Brakes. The constricting clutches and brakes are manufactured with elastic neoprene tubes integrally bonded inside the face of the rim.

Gummi FK is a unique and resilient design, providing versatility in its ability to compensate for less than a perfect alignment within the driving system, while still delivering an even transfer of power. 


  • Torque Ratings: up to: 211,000 lb-in @75 PSI & 100 RPM
  • Max. Speed: 2000 rpm
  • Flexible Coupling: Compensates for minor misalignments
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Gummi FK Air Clutch and Drum Brake

Industrial Clutch Parts Ltd. distributes Gummi FK units to a variety of power transmission applications. The Gummi FK Air Clutches and Drum Brakes are well suited for a variety of high speed and low/medium torque power transmission applications, where high heat generation is not a factor.

Available in single, dual and split configurations, the FK design and construction are simple in operation. An integrated neoprene tube, reinforced with various ply of cords, is vulcanized to the inside of a steel rim. A set of friction shoes are connected to the inside of the tube using shoe pins and a lock wire kit. When the tube is pressurized, the friction shoes are forced to engage around the drum. The rubber nylon cord-reinforced air tube forces the element’s friction shoe assemblies against the outer edge of the drum.

The FK has been manufactured to transmit torque through its sidewalls, absorbing shock loads and vibration to protect the drive components from the transmission.  The rate at which the air tube is pressurized directly affects the rate at which the torque increases. The neoprene rubber tube formulation also reduces the effects of torsional vibrations. The flexible design allows the tube to compensate minor misalignment and axial movements of the shaft.

Gummi FK is available in 20 different sizes, all identified by the drum diameter in inches, as well as the width in inches of the friction lining.

Standard Sizes:

  • 3FK150, 4FK200, 6FK200, 8FK250, 10FK300, 12FK350, 14FK400, 16FK500, 18FK500, 20FK500, 22FK500, 24FK500, 26FK525, 28FK525, 30FK525, 32FK525, 36FK525, 40FK525

Product Specific Information

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Product Clutch or Brake
Brand Gummi
Industry Applications Can manufacturing, commercial laundry equipment, metal forming, drilling equipment, printing machines, rubber processing, tire manufacturing, textile machinery.
Actuation Method Pneumatic
Brake Type Drum
Compares With Eaton Airflex
Clutch Type Drum
Max. RPM 2000
Torque Rating up to 211,000 lbs-in @75 PSI & 100 RPM