NO.2  Needle roller Bearing classification

1. Radial needle roller and cage assemblies

2. NA, NKI type needle roller bearings

3. RNA, NK model without inner ring needle roller bearings

4. Type HK stamping outer ring needle roller bearing

5. Type BK stamping outer ring needle roller bearing Mounted on the shaft end drawn cup needle roller bearing is open on both sides (1) and unilateral enclosed (2). Closed drawn cup base face can absorb small axial guiding force. Mounted on the shaft end drawn cup needle roller bearing is open on both sides (1) and unilateral enclosed (2). Closed drawn cup base face can absorb small axial guiding force.

NO.3. Needle roller Bearing Notice

Needle roller bearing capacity big, applicable to the limited size of installation of supporting structure, Journal as rolling surface hardening on the surface, bearing use force fit into the hole, need not again for axial positioning. Bearings should be injected into the right amount of grease before installation, under normal circumstances, after assembly don't have to BK type lubricating bearing used in shaft neck without out of the bearing, encloses the seal effect, and can withstand the smaller axial winding.

NO.4. Needle roller Bearing Common causes damage

1.mote: Clean the bearings and the surrounding environment, invisible to the eye fine dust is bearing strong killer, it can increase the bearing wear and tear, vibration and noise ,

2. stamping: Formed strong stamping when applying device, it is likely to result in needle roller bearing damage or use the hammer knock bearing directly, through the rolling body transfer pressure, etc.

3.Not professional tools : Use something suitable and accurate equipment using the dedicated things, as far as possible can avoid using cloth class and short fiber, things like that. Needle roller bearing in the laboratory experiment and application in practice, can be clear to see, in the same homework appearance under the condition of the same needle roller bearing, actually its life have very big difference.