POM and PA are the most commonly used plastic bearing materials, with working temperatures ranging from -60 ℃ to 100 ℃. They have high and smooth surface strength, and basically no tension. Their good self-lubricating performance and low friction coefficient can be applied to precision and high-speed operation while maintaining the traditional advantages of plastic bearings. POM plastic bearings are the most widely used among all plastic bearings. Generally, the inner and outer ball materials are made of POM or PA, and the cage is made of glass fiber reinforced nylon 66 (GRPA66-25). The ball bearings are made of glass, stainless steel or ceramic balls, which perform well in alkaline environments but are not suitable for operation in acidic corrosive environments.

POM, also known as "Saigang", has excellent properties such as polyoxymethylene, also known as polyhexamethylene oxide (POM). The regular molecular structure and crystallinity make its physical and mechanical properties extremely excellent, earning it the nickname of metallic plastic.

Advantages: It has good comprehensive performance and coloring ability, high elastic modulus, high rigidity and hardness, tensile strength, bending strength, excellent creep resistance and fatigue resistance, repeated impact resistance, low friction coefficient, wear resistance, good dimensional stability, good surface gloss, high viscoelasticity, low water absorption, excellent electrical insulation, and is not affected by temperature; Low water absorption, good insulation resistance, and not affected by humidity The mechanical performance is less affected by temperature, with high mechanical strength and wear resistance at high thermal deformation temperatures. It can be used in the temperature range of -40 ° C to 100 ° C and is suitable for making relatively precise plastic bearings. Its good self-lubricating performance and low friction coefficient

Disadvantages: Not acid resistant, not resistant to strong alkali and not resistant to moonlight and ultraviolet radiation, poor thermal stability, easy to burn, prone to aging in the atmosphere, extremely easy to decompose, with a decomposition temperature of 240 degrees POM plastic bearings are widely used among all plastic bearings. The inner and outer ball materials are generally made of POM, and the cage is made of glass fiber reinforced nylon PA66. The ball bearings are glass balls, stainless steel balls, or ceramic balls. This type of bearing performs well in alkaline environments but is not suitable for operation in acidic corrosive environments.