-Description
Rubbing surfaces, usually with lubricant; some bearings use pumped lubrication and behave similarly to fluid bearings.
-Friction
Depends on materials and construction, PTFE has coefficient of friction ~0.05-0.35, depending upon fillers added
-Stiffness
Good, provided wear is low, but some slack is normally present
-Speed
Low to very high
-Life
Low to very high - depends upon application and lubrication
-Cautions
Widely used, relatively high friction, suffers from stiction in some applications. Depending upon the application, lifetime can be higher or lower than rolling element bearings.
Rubbing surfaces, usually with lubricant; some bearings use pumped lubrication and behave similarly to fluid bearings.
-Friction
Depends on materials and construction, PTFE has coefficient of friction ~0.05-0.35, depending upon fillers added
-Stiffness
Good, provided wear is low, but some slack is normally present
-Speed
Low to very high
-Life
Low to very high - depends upon application and lubrication
-Cautions
Widely used, relatively high friction, suffers from stiction in some applications. Depending upon the application, lifetime can be higher or lower than rolling element bearings.