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Two complex issues regarding maintenance technology of rolling bearings is: when to change the oil and oil should change. If too little oil, rolling bearings will be scrapped in advance; if too much oil, rolling bearings will mess up or long-term hazard-powered coils of line and volume.
Traditionally, lubrication plans are set according to the time. Equipment suppliers usually develop according to the operating time lubrication plans. And equipment suppliers in their maintenance plan the amount of lubricating oil regularly to take part in the process guidance. For staff, short-term oil changes is a very common thing, and often add grease. Officers are required to replace the lubricant every liangdaosanxingqi, every time you add an ounce of grease. Which led from the start, they were not established on a factor that does not know of any practical significance.
Lubrication interval has a simple premise: rolling bearings are not stopped by drying and crash under the conditions of maintaining the proper functioning of the device. This is a fixed concept of prevention. However, we must maintain the balance between excessive lubrication of lubrication-hungry and a lot.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7304BEA NSK | 20 | 52 | 15 |
| 7304B NSK | 20 | 52 | 15 |