Castor manufacturers of introduction to material composition and classification of castor castor made of different materials not only have a distinct advantage, nylon caster and good heat resistance, cold resistant, wear resistance and other characteristics, and compare its weight light, convenient to carry, more and more in the transport industry, using or aviation industry. 2 because of polyurethane, polyurethane caster and abrasion resistance, water resistance and other characteristics, so much for environmental protection, clean industry, polyurethane (pu) on the surface of friction coefficient is small, so in the process of using low noise coefficient, become a lot of environmental protection industry preferred. Three as a result of the synthetic rubber, synthetic rubber caster and cost is low, have a special plastic material processing and become, its inheritance the flexibility of rubber casters, water resistant at the same time, the strong cold resistance, resistance to high temperature and extreme conditions can be normal use, so is also a in the use of a wide range of castor has higher industry prospects. Four, as more frequent use of a rubber casters, due to the special rubber material, its elastic, good resistance to sliding, the coefficient of friction with the ground is high, so at the time of delivery of the goods can be guided, security of mobile, therefore has been widely used in indoor and outdoor use. According to whether to classification are divided into directional casters with the directional casters ( The universal casters) 。 Directional castor no rotating structure, cannot turn; According to the main application industry classification is divided into medical casters, industrial casters, supermarket casters, furniture casters, and so on. Medical truckle to adapt to the requirements of the hospital operation is light, flexible steering, elasticity, special ultra-quiet, abrasion resistance, winding and resistance to chemical corrosion and so on characteristics, special castor. Industrial casters is mainly refers to a caster wheel used in machinery factory or products, it can be advanced of imported reinforced nylon ( PA6) , super single wheel made of polyurethane, rubber, integral whole product has a high impact resistance and strength. Supermarket castor, in order to meet the need of supermarket shelves of mobile and flexible features convenient shopping cart needs and special research and development of castor. Mainly in order to meet the need of furniture furniture caster and low center of gravity, the needs of high load production of special castor. According to the material classification of castor mainly divided into super synthetic rubber casters, polyurethane casters, plastic castor, nylon casters, caster wheel steel, high temperature resistant casters, rubber casters, S type synthetic rubber casters