Airflex Constricting Type Clutches and Brakes

Drum-style products that when pressurized, expand radially inward forcing their friction shoes against an outer cylindrical drum surface. Use CB for power transmission applications, CM for marine and VC for heavy duty equipment. The new High Energy Ventilated Clutch features metallic friction linings to sustain more torque and extend slip times for improved efficiency and extended driveline component life.

Type CB

Torque capacities up to:

  • 1,160,000 Ib•in
  • 131.000 N•m

Airflex CB element assemblies are used as both clutches and brakes in general power transmission service. The primary feature of the CB design and construction is the Airflex torsional resilient principle made possible by the transmission of power through the side walls of the flexible neoprene and cord actuating tube. This flexibility also permits minor shaft misalignment.

Type VC

Torque capacities up to:

  • 13,877,000 Ib•in
  • 1567.000 N•m

Airflex VC element assemblies are designed and built for severe clutching and braking applications on heavy duty equipment. They are unmatched for high starting loads and sustained slippage where heat generated tends to lower efficiency and shorten the operating life of conventional clutches. Their high torque ratings permit use of smaller diameter units which lowers contact velocity on high speed applications. Ventilated construction permits passage of cooling air, to rapidly dissipate heat from the friction shoes. Torque is transmitted from the side plates of the elements through torque bars to the friction shoes.

Type CM

Torque capacities up to:

  • 3,236,000 Ib•in
  • 365.000 N•m

Airflex CM element assemblies were designed primarily for the marine industry for use on diesel driven reverse-reduction gears. In addition to providing all of the CB element features, their ventilated friction shoes permit clutch slippage at low energy rates during vessel maneuvering, as well as cycling engagements at high energy rates. Rim registering allows triple element assemblies.

Type E

Torque capacities up to:

  • 1,010,000 lb•in
  • 114.000 N•m

Airflex E elements are primarily used as slip clutches or tension brakes; however, they can also be used for general power transmission service. Torque is transmitted from the friction shoes to the element housing through torque bars. Engagement occurs when air expands the actuating tube forcing the friction shoes against the inside diameter of the drum. Release springs assist shoe disengagement and counteract centrifugal force.

Type VE

Torque capacities up to:

  • 221,000 lb•in
  • 24.950 N•m

Airflex VE elements were specially designed for greater heat dissipation capacity in an expanding type element. Available in a limited number of sizes, they offer all of the type E features.

Type EB

Torque capacities up to:

  • 98,580 lb•in
  • 11.130 N•m

Airflex EB element assemblies are used in both clutch and brake service with light starting loads. The EB is similar in design to the CB except that it is an expanding type unit.

Type ER

Torque capacities up to:

  • 118,000 lb•in
  • 13.300 N•m

Airflex ER couplings are expanding units with neoprene facing. As such, they combine the advantages of a flexible and disconnect coupling. Engagement of the element should occur when there is no speed differential between driving and driven shaft.