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In the past a dozen years, on residual austenite quantity and its advantages and disadvantages have been studied, and there is a certain amount of controversy. Main set in is priority consider NSK bearing of size stability, also is consider life problem? has long, General believes that residual Olympics's body hardness low, on bearing of strength, and wear sexual, and anti-fatigue performance adverse, especially its as Asia stability phase exists Yu finished bearing in the, is caused size does not stability of main causes, in my all bearing production enterprise in the by used of heat treatment technology to will residual Olympics's body as possible fell minimum for target.
Through an in-depth analysis of different lubricants NSK bearing failure, significant increase in pollution in the physical environment on residual austenite bearing service life in new light. The bearings are mainly used in the pollution of the environment to contact fatigue spalling of surface origin and eventually lead to failure. Its failure mechanism was, in pollution in lubrication medium, hard particles and various types of metal fragments due to be squeezed by the rolling, rotation raceways have a certain size of potholes, potholes contact stress at the edge of a very large. Therefore acceleration of fatigue crack propagation and surface flaking.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7336ADF NSK | 180 | 380 | 75 |
| 7236BDF NSK | 180 | 320 | 52 |