SKF

Principles of Selection (Bushings, Thrust Washers and Strips)

Selecting SKF plain bushings, thrust washers, or strips requires evaluating the sliding material, load (dynamic and static), sliding speed, operating temperature, mating surface finish and hardness, and the surrounding environment. SKF’s selection principles guide engineers from initial design concepts to a fully specified part number. The process begins with choosing the appropriate bushing type (cylindrical, flanged, or thrust washer) and matching the sliding material to the load and speed using the pv value. Size selection uses the specific load capacity (MPa) and permissible sliding velocity charts. Special consideration is given to the machinability of composite materials if custom sizes are needed. Lubrication is typically not required for composite bushings, but initial grease may improve running-in. Mounting methods include press-fit, adhesive bonding, and mechanical retention, depending on housing material and design. Adhering to these principles ensures long, maintenance-free service life.