Plastic bearing materials

Plastic bearing materials
1 precision plastic bearings
POM and PA material with good mechanical strength and wear resistance, suitable for the production of precision plastic bearings, a good self-lubricating properties and low friction coefficient, on the basis of maintaining the traditional advantages of plastic bearings can be applied to precision and more high speed operation. POM plastic bearings are the most widely used of all Plastic bearing, general internal and external ball materials with POM or PA, to keep the frame using glass fiber reinforced nylon 66 (GRPA66-25). Ball glass ball, stainless steel balls or ceramic balls, bearing alkaline environment such good performance but is not suitable for running in acidic corrosive environment.
(2) corrosion-resistant plastic bearings
As the the fluoroplastics most typical varieties, PTFE and PVDF has excellent resistance to corrosion, where PTFE corrosion resistance of the best of all known engineering plastics can be used for all of the concentrated acid and concentrated alkali occasions, including HF and fuming sulfuric acid, nitric acid (98%), etc., and has good high temperature performance, PTFE proved to be used for the high temperature of 180 ° C, PVDF can also be used to 150 ° C, but PTEF material very low mechanical strength and dimensional stability than and deformation temperature, and compared in terms of PVDF has better performance inside and outside the ring material selection PTFE or PVDF, cage materials for PTFE or PVDF,slide bearing ball in general for the glass balls or ceramic balls.
Acid and alkali resistant plastic bearings
HDPE, PP, and the UPE materials have proved for the relatively weak acid-base cross-environment (30% Cucl2 solution 30% NaoH solution test OK) it applies to most of the acid / alkali / salt / solvent / oil / gas and seawater corrosion environment. With general plastic bearings, oil-free self-lubricating, anti-magnetic electrical insulation performance, but lower mechanical strength, easily deformed, it is not used for larger loads and higher speed, comparatively speaking, the UPE materials with better strength characteristics of low friction characteristics and low temperature applications (minimum to -150 ° C), inside and outside the ring material uses of HDPE, PP or the UPE, using the cage material of HDPE, PP or UPE, balls glass balls, stainless steel balls or ceramic balls.
4.PEEK/PI plastic bearings (high-temperature plastic bearings)
As a new engineering plastic materials, PEEK and PI proved to be the best mechanical strength, dimensional stability and high temperature performance of all known engineering plastics, PEEK long-term use temperature up to 260 ° C, the PI long-term use temperature is as high as 300 ℃ and has excellent resistance to corrosion, corrosion in the pH of the medium intensity environment can still operate freely, it is commonly used to make the bearings of precision in a relatively harsh environment operation, the drawback is because the material itself is expensive, so use The high cost of the inside and outside the ring material selection PEEK or PI, the cage material is PTFE, PEEK, PI, the ball generally ZrO2 or Si3N4 ceramic ball.
(5) plastic bearing and plastic spherical bearings
Plastic tape bearing a unique weight is light, easy to install, maintenance-free, while the commonly used cast iron or stamping seat does not have a shock impact resistance. With the continuous development of new materials are increasingly widely used in engineering. For different situations, plastic spherical bearing POM, HDPE, PP,, the UPE, PTFE and other materials, plastic bearing is commonly used PBT materials can be used.