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Rolling element is a crucial components of rolling bearing. The common to see rolling elements are ball, cylindrical roller, spherical roller, needle roller, tapered roller and so on. According to the material of the cage assemblies, it basically can be divided into press steel cages, machined brass cages, chrome steel and molded polyamide cages. Pressed steel cages and machined brass cages are generally used. 

- When rolling bearing operates, sliding friction cause bearing heat and wear. Especially under high temperature conditions, inertial centrifugal force exacerbates friction, wear and heat. Therefore, qualified needle roller and cage assemblies must meet the following requirements, stiffness, good thermal conductivity, low friction factor, wear resistance, impact resistance and the coefficient of line-expansion of the cage assemblies are similar to the rolling-elements. In addition, the material of cage assemblies has good processing performance. 

- TBB cylindrical roller and cage assemblies are characterized by high stiffness, long life service life. Our cylindrical roller and cages assemblies are available in all sizes, designs and materials. All of these are ISO certificate approved make sure the high quality and competitive price.