Understanding of the features of needle roller bearing and USES

Needle roller bearing features and use: the roller (needle bearing with fine and long For 3 ~ 10 times the diameter of the roller length, diameter, generally no more than 5 mm) , so the radial structure is compact, its inner diameter size and load capacity at the same time, with other types of bearing outside diameter to a minimum, especially suitable for the limited size of the radial installation supporting results. According to the use of different occasions, can be used without inner ring of the bearing or needle roller and cage components, at this time to suit the bearing surface of the surface of the shaft and the shell hole directly as inner and outer rolling bearing surface, in order to ensure the load capacity and operation performance and you have the same ring bearing, axis or shell hole hardness on the surface of the raceway, machining accuracy and surface quality should be as a bearing ring raceway. These bearings can bear radial load only. Reliable quality needle roller bearing is ahead in the international market, in the occasion of because of the space limit can't install oil seal, can provide the open end or closed end seal stamping outer ring needle roller bearings, bearing oil seal with the inner ring than the outer ring of 1 mm wide, which makes the bearing in the crankshaft bearing is relatively a small displacement when also can guarantee good and avoid to bearing the contaminated oil seal work. Needle roller bearing is composed of one or two ring and retainer of needle group, if the shaft cannot be used as a race, when the shaft grinding hardened with impossible or not economic, can adopt this kind of needle roller bearings with inner ring. Needle roller bearing is a centripetal needle bearing and thrust bearing components of bearing unit, the compact structure small volume, rotation of high precision, high in can bear radial load at the same time absorb a certain amount of axial load, choose high precision cylindrical roller ( Needle) Increased the contact length, make the bearings in a small space can be obtained under high load capacity and high stiffness, the implemented standardization, seriation, generalization, suitable for mass production and supply, use and maintenance is very convenient.