SKF
Couplings
SKF couplings connect two shafts to transmit torque while accommodating various degrees of misalignment (angular, parallel, axial) and protecting equipment from shock loads and vibration. The portfolio spans flexible jaw couplings (standard and high-torque), gear couplings, disc couplings, grid couplings, and fluid couplings, plus specialist designs for specific industries. Flexible couplings use elastomeric inserts or disc packs to dampen vibration and tolerate misalignment without transmitting high reaction forces to adjacent bearings. Fluid couplings provide soft-start and torque limitation for heavy conveyor and crusher drives. SKF couplings are manufactured from high-grade steel, ductile iron, and advanced polymers, with finish bore or taper bushing hubs. They are used in motor-pump sets, compressor drives, fan assemblies, steel mill rollers, and mining conveyors. Selecting the correct coupling type and size for the application’s torque, speed, misalignment, and service factor is critical for protecting both driving and driven machinery. SKF’s coupling selection tools and technical support ensure a reliable match.
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Trusted by Industry Leaders
Misalignment Accommodation
Jaw and disc couplings handle angular, parallel, and axial offsets.
Vibration Dampening
Elastomeric inserts in jaw couplings reduce transmitted vibration and noise.
Shock Load Protection
Flexible elements and fluid couplings absorb and dampen torque spikes.
High Torque Density
Gear and grid couplings transmit large torques in compact envelopes.
Easy Maintenance
Replaceable elastomer inserts and disc packs without moving the machines.
Global Industry Standards
AGMA, ISO, and DIN dimensions for retrofit.
Jaw Couplings: The Most Versatile Flexible Coupling
Jaw couplings consist of two metal hubs with interlocking jaws and an elastomeric "spider" in between. They fail-safe (if the spider breaks, the drive separates), dampen torsional vibration, and handle moderate misalignment. SKF’s jaw couplings are used extensively in industrial pump, fan, and compressor drives. Selecting the correct spider material (NBR for general, polyurethane for torque, Hytrel for temperature) maximises service life.
Fluid Couplings for Heavy Conveyor Soft-Start
In long, heavily loaded belt conveyors, direct-on-line starting can damage belts and gearboxes due to high inrush torque. SKF fluid couplings use a fluid circuit between an impeller and runner to provide a smooth, controlled start-up, limiting torque and reducing mechanical stress. They also protect the drive from stall overloads, a common cause of conveyor motor burnout.