Why do so many industries need to needle roller bearings?

Needle roller bearings are widely used at present market is very hot, and 

in this process, the field of machine tools use some relatively wide.

Scope of application: this bearing needle roller bearings are used for 

gearbox, motorcycle, automobile, the small end of connecting rod. Gear. 

Because the cylinder temperature reducer, increase, so the bearing high 

temperature. With thin and long needle bearing roller (roller length is 

3~10 times the diameter, the diameter is generally not more than 5mm), so 

the radial structure is compact, its diameter size and load capacity 

compared with other types of bearings at the same time, minimum diameter, 

especially for radial installation support results in limited size. 

According to the use of different occasions, can be used without inner ring 

bearings or needle roller and cage assemblies, the shaft neck surface and 

the surface of shell holes matched with a bearing directly as bearing inner 

and outer rolling surface, to guarantee load capacity and operating 

performance and have the same ring bearing, shaft or housing holes raceway 

surface hardness, the machining precision and the surface quality of 

bearing ring raceway and similar.‍