YDTech® manufacturer of precision bearing rollers sizes(NRA,NRB) and needle rollers stocks! supplier of standard cylindrical rollers or needle rollers stocks(G2,G3) in china.

Bearings typically consist of an outer race, an inner race, and rolling elements (such as balls or rollers) that are contained within the races. The rolling elements are used to separate the inner and outer races and reduce friction between them, allowing for smooth and efficient motion. Bearings can come in a variety of different types and configurations to suit different applications, such as radial bearings for supporting loads perpendicular to the shaft, and thrust bearings for supporting loads parallel to the shaft.30x30,32x32,34x34,36x36,38x38,40x40

we have over 20 years of manufacturing experience of precision rolelrs. we had most stock, delivery time: send to europe, USA, or canada only 3-5 work days

High-precision needle rollers or cylindrical rollers, on the other hand, typically consist of only the rolling elements themselves, without the outer or inner races. They are often used as a component in other types of bearings or mechanical systems, such as in needle roller bearings or linear motion systems. The high-precision manufacturing and tight tolerances of these rollers make them well-suited for applications where precise motion control and low friction are critical.

needle roller contour surface in the proximal surface of the slight contraction. needle and raceway contact line results can be amended to avoid damaging the edge of the stress.

In summary, while both high-precision needle rollers or cylindrical rollers and bearings use rolling elements to facilitate motion, bearings include outer and inner races and have a wider variety of configurations, while high-precision rollers are typically used as a component in other types of bearings or mechanical systems.

we are professional manufacture of bearing rollers and cylindrical needle rollers. we produce rollers of diameter 0.5 mm to 60 mm. the rollers could satisfy the request of DIN 5402 G2 rollers.

standard sizes of cylindrical rollers