As the name suggests is to use plastic bearings bearing production of plastic materials, plastic bearing is divided into three parts, shaft sleeve, plastic ball, and a fixed frame, one of the most important parts than the plastic ball, because the degree of precision plastic ball directly affects the use effect of plastic bearings, plastic bearings, precision plastic ball making use of life is very short, even high quality plastic ball used less than half the time, so the plastic bearing bad mainly depends on the degree of precision plastic ball and ball plastic material selection, material plastic ball bearings used in the PA66, because the wear resistance of nylon plastic ball is very good, but also self lubrication that is not sensitive to temperature, can work normally in 150 degrees below the temperature, so the plastic ball bearing more than 80% is the selection of bearing nylon plastic ball making, but Also has a small part of the plastic bearing selection is PP plastic ball, is mainly used on the bearing products, taking into account the environmental factors will choose PP plastic ball production of plastic bearings.