SKF POM composite bushings are available as straight bushings in inch sizes. Pockets in the sliding surface make these bushings suitable for applications that require minimal maintenance under difficult operating conditions, for example in contaminated environments where lubricant cannot be supplied continuously or frequently. Therefore, the grease reservoirs should be filled prior to installation. Despite of their compact design, POM composite bushings can accommodate heavy radial loads and are less sensitive to misalignment. They are suitable for slow rotational or oscillating as well as linear movements.
POM composite bushings consists of a sheet steel backing on which a 0,2 to 0,4 mm thick layer of tin/bronze is sintered. The principal characteristic of these bushings is their relatively thick (approximately 0,25 to 0,45 mm) covering layer of acetal resin (POM – polyoxymethylene) with additives. This covering layer has pockets to retain grease and is firmly attached to the sintered tin/bronze layer.
The thickness of the covering layer makes these bushings less sensitive to misalignment and the edge loading associated with that misalignment.