YDTech® manufacturer of precision needle rollers sizes(NRA,NRB)2.5x13.8,2.5x15.8,2.5x17.8,2.5x19.8,2.2x21.8,2.5x23.8 and needle rollers stocks! supplier of 2x17.8,2x19.8,2.5x7.8,2.5x9.8,2.5x11.8, standard needle rollers pins stocks(G2,G3) in china.

The main difference between cylindrical rollers and needle rollers is their shape and size. Cylindrical rollers are cylindrical shaped rolling elements that are relatively thick in diameter, while needle rollers are long and thin cylindrical rollers that are much smaller in diameter than cylindrical rollers.

2x6.8,2x7.8,2x9.8,2x11.8,2x13.8,2x15.8, 2x17.8,2x19.8,2.5x7.8,2.5x9.8,2.5x11.8, 2.5x13.8,2.5x15.8,2.5x17.8,2.5x19.8,2.2x21.8,2.5x23.8

The design of a needle roller bearing typically consists of a thin outer ring, a series of cylindrical rollers, and an inner ring, which may or may not be separable from the outer ring. Needle roller bearings are often used in conjunction with thrust bearings to provide additional support for axial loads. They are available in a variety of configurations, including single-row, double-row, and full complement designs, and can be made from a range of materials, such as steel, brass, or plastic.

Cylindrical rollers are typically used in cylindrical roller bearings, where they are guided by two ribs on either the inner or outer ring of the bearing, and are designed to handle high radial loads.

Needle rollers, on the other hand, are typically used in needle roller bearings, where they are used to reduce friction in applications with limited space, such as in automotive transmissions and aircraft engines.

Overall, the choice between cylindrical rollers and needle rollers depends on the specific requirements of the application, such as the space available, load capacity, and operating conditions.

standard sizes of needle rollers and cylindrical rollers