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Although you can install "free" all kinds of NSK bearing seal, but remains with the early failure of the bearing oil technology of Chinese 36% is incorrect and improper use. In any improper lubrication of the bearings in normal life inevitably failed to move forward. Machinery and equipment bearing is often the most difficult part of working without lubrication is a problem fixed. Artificial maintenance of situations, it is impossible to achieve, automatic lubrication system, could be developed in order to achieve the best results. Need grease, tools and effective lubrication technology, will help to significantly reduce downtime.
NSK bearing parts in use under the influence of abnormal high temperature and lack of cooling in a timely manner, would spare parts surface groups produce high-temperature tempering or secondary hardening phenomenon called burns.
Burn mainly due to poor lubrication, neck of excessive loads, poor choice of clearance, NSK bearings is not configured properly, bad contact of the Raceway surface and stress caused by too large because of the cold. Such as;
1) in axial free bearing, if external factors fit too tight, cannot move around in the shell-hole;
2) bearing operating temperatures, the thermal expansion of the shaft caused a great deal of axial force, when axial movement and NSK bearings was not possible;
3) due to insufficient lubrication or lubricant selection is not reasonable, quality issues, aging and deterioration;
4) operation temperature-difference of inside and outside, plus clearance improper external expansion of small internal interference leading to NSK bearing temperature rise sharply;
5) bearings are subjected to too great a load and the load is not evenly distributed in the CD, the formation stress concentration;
6) part surface roughness, resulting in poor contact or difficulty in oil film formation.
Morphology of Burns as judged by the color on the surface of small. NSK bearings in use due to lubricants, temperature, corrosion and other reasons, part surface changes, colors are mainly pale yellow, amber, brown-red, purple, blue and dark blue, Brown, yellow, yellow, red chip in the color (see related content), to burn the discretion of if there is a purple-blue or dark blue. Burns appears likely to cause decline in surface hardness of parts or micro-grain.
Burn parts mainly in parts of the contact surfaces, such as rib of tapered roller bearing face, Tan Ziduan, stress concentration of scroll bar surface.
Causes of burn prevention according to burn to take targeted measures. Such as proper selection of bearing structure and configuration, avoiding received large loads of NSK bearings, installation proper installation, ensure lubrication to prevent stress concentration effect.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 609ZZ NSK | 9 | 24 | 7 |
| 699ZZ1 NSK | 9 | 20 | 6 |