Research on Factors Affecting Friction Coefficient of High Performance Plastic Bearings

High-performance plastic bearings are often processed from self-lubricating modified engineering plastics. The friction coefficient of plastic bearings directly affects the service life of the bearings and the required driving force, and directly leads to the working temperature of the equipment. Therefore, the friction coefficient of the bearing is a performance parameter that the bearing design engineer pays close attention to.

The friction coefficient of self-lubricating plastic bearings depends to a large extent on the self-lubricating properties of the materials used in the bearings. China CSB Company also found that in addition to the plastic bearing materials themselves, the working friction coefficient of plastic bearings has also received numerous The influence of external factors, such as working load, speed of movement, ambient temperature, etc., CSB engineers in the tens of thousands of laboratory tests have concluded that the friction coefficient of self-lubricating plastic bearings decreases with increasing working load; It increases with the increase of the speed of movement; it increases with the increase of the working temperature.

CSB engineers found in the test that the plastic bearings CSB-EP and CSB-EP13 have a lower friction coefficient below 80 °C, the new plastic bearing CSB-EP3 and the new material CSB-EP3G have lower friction at 130 °C. The coefficient, while the high-performance plastic bearings CSB-EP5 and CSB-EP5Z have an extremely low coefficient of friction of about 0.11 despite high load and 160 temperatures.

In addition, CSB research engineers also found that the friction coefficient of self-lubricating plastic bearings is also affected by the surface finish of the grinding shaft. It is found that the lower or higher the smoothness of the shaft leads to an increase in the friction coefficient, and the shaft finish is ideally in Ra0. 4 to 0.8, which has a lower coefficient of friction.