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Types and classification of needle bearing

Types of needle roller bearing:
In addition to catalog listed can be used for bearings, the general engineering such as: open stamping outer ring needle roller bearings (1), closed stamping outer ring needle roller bearings (2), needle roller bearing inner ring (3) and no needle roller bearing inner ring (4) SKF can also supply various types of needle roller bearings, needle roller, 1 keep frame assembly 2, needle roller bearings without retaining edge 3, self-aligning roller bearing 4, combined needle / ball bearing 5, combined needle / thrust ball bearing 6, combined needle roller / roller thrust bearing
Stamping outer ring needle roller bearings
Stamping outer ring needle roller bearings for needle roller bearing with thin stamping outer ring. Its main feature is the section height is very low and bear higher load capacity. Mainly used for the bearing arrangement is compact in structure, cheap price and the bearing housing hole can not be used as a needle holder components raceway. Bearing and bearing box must be installed by interference fit. Shoulder can be avoided if the box, such as axial stop ring positioning, then, the bearing housing hole can be very simple and economic.
Installed in the shaft stamping outer ring needle roller bearings with bilateral open end (1) and unilateral closed (2). Axial closed stamping outer ring base end can bear big guide.
Needle roller bearings are generally not attached to the inner ring. In the shaft neck cannot be hardened and ground applications, can use inner columns in the table.
Hardened steel outer ring and the needle punching outer ring needle roller bearing cage assembly can not be separated. Storage lubricant free space can be extended to add lubrication interval. Generally use the single bearing design. But except the bearing wide specifications 1522162220302538 and 3038 series, which is equipped with two needle roller and cage assembly. The outer ring of the bearing lubrication oil hole. According to user needs, all single stamping outer ring needle roller bearing shaft diameter greater than or equal to 7mm are to be equipped with outer ring with lubricating oil hole (designation suffix AS1).
A seal stamping outer ring needle roller bearings
In the seal space constraints cannot be installed because of the occasion, to provide open-ended or closed ended with seal stamping outer ring needle roller bearings (3 to 5). This type of bearing friction type oil seal equipment of polyurethane or synthetic rubber, lithium base grease filled with good antirust performance, operating temperature to +100 Deg. C for -20.
A seal bearing inner ring outer ring width than 1mm, which makes the bearing work to ensure a good seal and prevent injury to the bearing pollution can also trace displacement in the shaft to the bearing box. The inner ring of the bearing has lubrication holes, can need according to the bearing arrangement, by the outer or inner ring to add lubrication.
The classification of 4, needle roller bearing:
1). Radial needle roller and cage assembly
2).NA, NKI type needle roller bearings
3).RNA, NK type needle roller bearing without inner ring
4).HK type stamping outer ring needle roller bearings
5).BK type stamping outer ring needle roller bearings
Installed in the shaft stamping outer ring needle roller bearings with bilateral open end (1) and unilateral closed (2). Axial closed stamping outer ring base end can bear big guide.

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