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SKF 6406 bearing
According to different NTN bearing assembly, such as: the bearing pre-tightening nut rotates directly by axially compressing the inner bearing inner ring, the inner and outer rings, to eliminate the gap and realize the purpose of bearing pre-tightening force. At present, the realization of common use: first, far more than the pre-installed bearing, the nut at the end, and then back 1/4 turn. Assembling method, the advantages of this method are low investment, simplicity, practicality, and consistent quality of tapered roller bearings. It can be used.
It works smoothly, reliably, and without noise under sliding friction. The sliding bearing of the lubricant on the liquid surface does not directly contact the separated lubrication conditions, and it can also greatly reduce the surface friction loss and wear. The film also has a certain shock absorption capacity. NTN bearings are widely used. Problems with bearing failures:
1. Ceramic tile surface corrosion: spectrum analysis found that the concentration of non-ferrous metal elements is abnormal; ferrography, there are many sub-micron penetrating particles of non-ferrous metal parts; excessive moisture in lubricating oil, excessive acidity.
2. NTN bearing journal surface strain: ferrograph cutting abrasive or black iron oxide particles, temper color metal surface.
3, NTN bearing journal surface corrosion: spectrum analysis found that abnormal concentration of iron, iron spectrum, there are many iron content in sub-micron particles, excessive moisture or acid oil exceeding the standard.
4. The strain on the surface of NTN bearing: Ferrograph cutting abrasives, composed of non-ferrous metals.
5. Micro-motion of tile back: spectrum analysis found abnormal level of iron, iron spectrum, there are many wear particles with iron content in submicron, water-in-oil and acid abnormalities.
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