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 bearings and the required driving force, and directly leads to the working temperature of equipment and instruments. Therefore, the friction coefficient of bearings is a performance parameter of great concern to bearing design engineers.
In addition, CSB research engineers also found that the friction coefficient of self-lubricating plastic bearing is also affected by the surface finish of the grinding shaft. Through the research, it is found that the lower or higher the finish of the shaft will lead to the increase of the friction coefficient. The ideal range of the finish of the shaft is Ra0.4 ~ 0.8, which has a lower friction coefficient.
The friction coefficient of self-lubricating plastic bearing largely depends on the self-lubricating performance of the materials used in the bearing. China CSB company also found that in addition to the factors of the plastic bearing materials themselves, the working friction coefficient of plastic bearing is also affected by many external factors, such as working load, movement speed, ambient temperature and so on.
In the test, CSB engineers found that plastic bearings csb-ep and csb-ep13 have low friction coefficients below 80 ℃, new plastic bearings csb-ep3 and new material csb-ep3g have low friction coefficients at 130 ℃, while high-performance plastic bearings csb-ep5 and csb-ep5z still have very low friction coefficients at about 0.11 under high load and 160 temperature.
CSB engineers have made the following conclusions from tens of thousands of laboratory tests: the friction coefficient of self-lubricating plastic bearing decreases with the increase of working load; It increases with the increase of motion speed; It increases with the increase of working temperature.