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In the recent development of rolling bearings at both ends, is installed on the corresponding strict closures. Its effectiveness, on the one hand maintain the bearing lubricant (oil) no loss during use, protect the bearings in a lubricant condition, on the other hand is trying to take care of bearing dust and harmful gases from the outside world does not enter the bearing cavity to prevent bearing causing damage. Common molecular compound rubber or plastic tightly closed circle, the tightly closed circle of steel (or shields).
Bearing installation tight closure is something that almost 4 in his later years, past the bearings are open, to protect the bearing grease and dust-proof, tight closure located on the mounted bearing at each end of the shaft. With industrial development, especially the food industry, modern machinery, as well as popularization of household appliances, compact requires facility preset close, weight slowed to avoid leakage, leak, which revealed the bearings with a tight closure of the bearing itself.
For many bearings sealed bearings is not very good, this method solves a lot of problems. I think we should pay attention to in the course of use. Seal is relatively good, is a good choice to avoid losses.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7222CTYNSULP4 NSK | 110 | 200 | 38 |
| 7216CTYNSULP4 NSK | 80 | 140 | 26 |