The inner and outer rings of plastic spherical bearings are generally made of engineering plastics as raw materials, and some also use wear-resistant metals as raw materials. Rolling elements are generally made of glass balls, stainless steel balls, and ceramic balls. The retainer is made of glass fiber reinforced nylon 66 (PA66) and PE or higher performance engineering plastics. High precision plastic bearings are generally processed using precision CNC machining, and the bearings have good rotational accuracy and tolerances. Many traditional plastic bearings are directly injection molded, which has a high cost-effectiveness due to its convenient molding process. (This process is generally used for pulleys) It is suitable for use in low-speed, medium load situations. It is widely used in industries such as toys, fitness equipment, furniture, medical machinery, advertising, and industries with weak chemical corrosion.



The main materials of various engineering plastics include PI (polyimide), PEEK (polyetheretherketone), UHMW-PE (ultra-high molecular weight polyethylene), PVDF (polyvinylidene fluoride), HDPE (high-density polyethylene), PTFE (polytetrafluoroethylene), POM (polyoxymethylene), PP (polypropylene), PBT (polybutylene terephthalate), PAA66 (nylon), etc