YDTech® manufacturer of precision needle rollers 4x11.8,4x13.8,4x15.8,4x17.8,4x19.8,4x21.8 sizes(NRA,NRB) and needle rollers stocks! supplier of standard cylindrical pins 4x23.8,4x25.8,4x27.8,4x29.8,4x34.8,4x39.8, needle rollers stocks(G2,G3) in china.

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

Another important difference is their geometry: cylindrical rollers are typically long and thin in shape, while cylindrical pins have a shorter and thicker design. In addition, cylindrical rollers are typically made of higher-quality materials and manufactured to tight tolerances to ensure smooth operation, while cylindrical pins are more commonly made from lower-grade materials and may not require such tight tolerances.

4x11.8,4x13.8,4x15.8,4x17.8,4x19.8,4x21.8, 4x23.8,4x25.8,4x27.8,4x29.8,4x34.8,4x39.8,

In terms of design, cylindrical rollers are typically longer and thinner in shape, while dowel pins are usually shorter and thicker. Cylindrical rollers are typically made from higher-quality materials and manufactured to tight tolerances to ensure smooth operation, while dowel pins are also made to tight tolerances but may be made from a wider variety of materials, including metals, plastics, and composites.

In summary, while both cylindrical rollers and dowel pins are cylindrical components, they are used for different purposes and have distinct design characteristics. Needle rollers are commonly made from materials that are hardened and ground to improve their strength, durability, and wear resistance. Hardening is the process of heating the material to a high temperature and then rapidly cooling it (quenching) to produce a hard surface layer..

The hardening process for needle rollers typically involves using a high-carbon steel or other alloy steel that is first annealed to reduce internal stresses and improve machinability. The steel is then formed into the shape of the needle roller and heat-treated to a high temperature, typically in the range of 800-900??C (1472-1652??F). The roller is then rapidly quenched in oil or water to produce a hard surface layer with improved wear resistance.

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 needle rollers and cylindrical rollers