Airflex expanding clutches and brakes are the go-to solutions for braking and tensioning applications. Available in three different series spanning a range of sizes and features, you’ll find the perfect fit for construction equipment, marine winches, laundry machines and more.
Long life - Rugged tire-like constricting tube
Even wear - Force applied uniformly at optimum radius
Many options - Wide torque capacity range
Three models for braking and tensioning applications
E – ideal for handling the large thermal loads of medium-speed cyclic applications, but can also serve as a general power transmission
EB – ideal for applications with light starting loads, EB elements behave as a centrifugal clutch
ER – thrive in applications that require disconnection without stopping the prime move and when the driving/driven equipment must be frequently withdrawn
How constricting elements work
Airflex expanding drum clutch and brake elements use a rugged, tire-like neoprene and cord tube that expands radially outward when pressurized. The expansion forces a friction surface against an inner cylindrical drum to create torque..
Force applied at maximum radius from axis
Instead of the reduced radius that occurs in plate clutches, expanding clutches concentrate the frictional force on the inside drum diameter to achieve maximum torque. The radius acts as the torque lever arm to generate and apply force uniformly around the circumference.
Features and benefits
Uniform contact velocity
In Airflex expanding clutches and brakes, friction shoe contact occurs across the cylindrical surface of the drum where the contact velocity is constant.