Constricting clutches and brakes

Danfoss Airflex constricting drum clutches concentrate the frictional force on the outer drum to maximize torque. They maintain uniform contact velocity, require no lubrication, are self-adjusting, and can be used as both clutches and brakes in general power transmission applications.

CB offer the perfect fit for high-speed cyclic operations, coupling, and general power transmission.

Tube is the only moving component
Cushioned action protects drive components
Flexible coupling
Torque capacities up to 131,000 Nm [1,160,000 lb-in]
Available in 20 sizes

CM are specifically engineered for the marine industry's diesel-driven, reverse-reduction gears.

Same basic features as CB elements
Ventilated construction for greater heat dissipation
Allows for double- and triple-element assemblies
Torque capacities up to 365,000 Nm [3,236,000 lb-in]
Available in five sizes

VC can handle the large inertial loads and sustained slippage of heavy-duty applications.

Ideal for modernizing existing equipment
Smaller diameters reduce contact velocity
Ventilated open construction dissipates heat rapidly
Shock-free engagement
Torque capacities available up to 1,050,759 Nm [9,300,000 lb-in]
Available in 24 sizes

HEVC increase energy capacity and allow for longer slip times in severe clutching and braking applications.

Same basic features and size as VC elements but with 25% higher torque
Safeguards driveline components during startup
Increased start times (over 15 seconds at highest energy)
Low friction wear for longer clutch life
Sustained torque at high temperatures
Torque capacities available up to 1,344,971 Nm [11,904,000 lb-in]
Available in six sizes

Specifications

Product	Torque range (Nm) [lb-in]	Speed range (rpm)
CB	41 - 58,752 [360 - 520,000]	2,000 - 670
VC	3,051 - 1,050,759 [27,000 - 9,300,000]	1,800 - 275
CM	14,914 - 69,260 [132,000 - 613,000]	1,030 - 900
HEVC	78,750 - 1,154,705 [697,000 - 10,220,000]	1,100 - 275

Click here to see the table in our most recent version of the catalog.