SKF POM composite bushings

SKF POM composite bushings are referred to as prelubricated because their material is designed to operate with marginal lubrication. These bushing type effectively fills the gap between fully lubricated and dry sliding bushings. SKF offers a wide range of straight POM composite bushings. Advantages of these bushings include: 

  • maintenance-free operation 
  • very good frictional properties 
  • high load carrying capacity 
  • high sliding velocity 
  • small operating clearance

SKF POM composite bushings are suitable for applications where a sliding material with self lubricating properties is a prerequisite. Application area examples for these bushings are:

  • agricultural equipment 
  • construction machinery 
  • material handling equipment 
  • home appliances and consumer goods

SKF POM composite bushings material

SKF POM composite plain bearings are suitable for applications that require minimal maintenance under difficult operating conditions. As a result of the lubricant retention pockets on the sliding surface, SKF POM composite plain bearings are especially well-suited for applications in contaminated environments where lubricant cannot be supplied continuously or frequently.

Cross section of SKF POM composite plain bearings
The performance of SKF POM composite plain bearings depends on the interaction of load, lubrication, surface roughness, sliding velocity, and temperature encountered in specific applications.

SKF POM composite bushings lubrication

SKF POM composite plain bearings are designed to operate under marginal lubrication conditions. The sliding surface of these plain bearings contains grease reservoirs which should be filled prior to installation. It is not necessary to relubricate these plain bearings, but the presence of a lubricant can extend the plain bearing service life considerably. To protect the mating surface against corrosion, grease can be applied periodically.

SKF POM composite bushings
SKF POM composite plain bearings are available as straight bushings, washers and strips.

Permissible load (dyn/stat), N/mm2: 120 (v ≤ 0,02) / 250
Permissible sliding velocity, m/s: 2,5 (p ≤ 1,0)1)
Friction coefficient m: 0,02 .. 0,20
Temperature range, °C: –40 .. +110

Application recommendations
Shaft tolerance: f7 – h8
Housing tolerance: H7
Shaft roughness Ra, mm: 0 .. 0,8
Shaft hardness, HB: 150 – 600

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