On the wear of plastic plain bearings
Plastic bearinPlastic bearinggs plastic bearings wear resistance depends on the wear resistance of the material itself， but the plastic bearing wear is closely related to the following factors: the shaft material， hardness， roughness， bearing running speed， load and ambient temperature ， humidity， etc。； as plastic sliding bearings manufacturers， is constantly optimize the wear resistance of the plastic bearing materials and provide users with the correct selection guidance； and as a user should follow the manufacture of plastic plain bearings Product manual selection of plastic plain bearings and assembly instructions。

Any bearing the most critical moment is to start the stage。 At this point， no lubricating film formation bearings to work， this is the most common situation。 As long as the one in the load bearing work will have a slight bearing wear。 In the startup phase， minor wear and tear more fully， they will wear with these small particles fill the outer surface of the shaft， so when working with low wear and tear can generate optimal lubricating film。 Started， minor wear down quickly， these changes had little impact on the size。 After start-up phase of continuous work， the wear rate of small and stable。

For any type of plastic plain bearings is matched with the best working conditions are， for example， with the axis of the best material， roughness； best work pressure， speed， temperature， etc。； of CSB-EP series the best plastic plain bearings with axis material for hard chromium plating surface； roughness on the CSB for each type of plastic plain bearings on the shaft roughness requirements are not the same， we can see from Figure 3 CSB plastic plain bearings on the shaft roughness from Ra0。 1 to Ra1。6； while CSB-EP5 plastic plain bearings is the best temperature is not at room temperature， EP5 at a temperature of 160 ℃， has shown the best friction and wear properties。

Figure 3: CSB-EP series of plastic plain bearings with shaft roughness

CSB laboratory continues to mimic a variety of operating conditions of the test study found that plastic sliding bearing wear occurs in the form of the work are the following:

Normal wear and tear - bearing in the correct place under the conditions used in conjunction with the wear and tear； this time bearing wear mainly work in the initial stages of bearing lubrication material transfer to the surface of the shaft， the result， when the deputy after the establishment of the ideal bearing lubrication The wear rate slowly decreased。

Crawling wear - As the shaft surface roughness caused by the friction surface is too smooth crawling； shaft surface is too smooth， lubricated plastic bearing material in the fill can not be transferred to the shaft surface pits in the formation of lubricant film， making the ideal friction can not be established； this when the bearing friction coefficient increases， the required driving force is increased；

Furrows wear - As the shaft is too rough cause friction surface scratches furrows phenomenon； shaft surface height difference is too large to transfer from the bearing surface of the solid lubricant material can not form an ideal smooth surface friction； substantial wear occurs at this time is scratch and abrasion；

Glue wear - because beyond the safe operation of the bearing axis due to temperature or glue； optical axis of the bearing operating temperature exceeds the allowable safe operating temperature of adsorption has occurred in the local softening of the bearing surface formed by friction wear。

Burns wear - running too fast because of the friction surface burns caused by wear and tear； shaft bearings run faster than the speed allowed will cause friction surface due to friction from a sharp rise in raw friction heat， a sharp increase in the frictional heat of friction surface resulted in a quick burn。

Of course， wear plastic bearings can not avoid the occurrence of the phenomenon， plastic plain bearings in the case of performance have been identified， we can only follow the possible use of each different type of bearing rule， the plastic sliding bearings to minimize wear and tear， which the performance of the plastic bearing play to the best。