NTN bearing is commonly made by inside and outer ring, rolling body and retainer . Usually inner ring with the shaft neck rotation, outer ring into base or component fixed bearing hole. Inside and outside all have groove of circle, when inside and outside the relative rotation circle, rolling  along the body to word. Retainer role is the roller along the way even ground roll off.

Rolling body and the internal and external circle material should be high hardness and contact fatigue strength, good resistance to wear and impact toughness. General use contain chromium alloy steel, the hardness of heat treatment HRC61 ~ 65, work surface must be approved by grinding and polishing. Maintains a generally with the low carbon steel stamping is made, high-speed bearing used more non-ferrous metal or plastic keep frame.

Compared with sliding bearing, friction NTN bearing has a small resistance and start sensitive, high efficiency, simple and easy to swap lubrication etc, and so being widely applied. Its defect is impact resistance ability is bad, high-speed occurs when the noise, the working life could not equal liquid friction of sliding bearings. Because NTN bearing has standardized, and the bearing mass production, so, the main task of users is familiar with standard, the correct choice.

 
Different shapes of roller, press rolling body shape NTN import bearings can be divided into ball bearings and roller bearings. Roller and divided into long cylindrical roller, short cylindrical roller, screw roller, tapered roller, spherical roller and needle.
 



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