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SKF bearing the required conditions of increasingly stringent market requirements of the equipment and other property, properties are becoming increasingly diversified. From a large number of structures, sizes, choose the most suitable bearing, you need different perspectives. Bearing selection, generally considered as a bearing installation and dismantling difficult arrangement, bearing dimensions and bearings market, such as space allows, general decisions bearing structure. Use a variety of mechanical design and durable service life limit bearings comparative study, and decided the bearing size. Selection of bearing, bearings tend to believe that the grease life in Aging, fatigue life of oil, abrasion resistance, low noise, also needs to be fully studied.
In addition, depending on the purpose, it is necessary to select the precision clearance, cage structure, requirements for grease, bearings of special design. However, selecting bearings not in order, rule, should give priority to SKF bearing the required conditions, performance, and related issues, in particular the practical. As long as intact as much as possible of the original properties of the bearing to maintain, maintenance, in the first place, to prevent accidents, ensure the reliability of operation, improve productivity and economy. Appropriate operation and maintenance standards, regularly, the best conditions. Including monitoring the running state to supplement or replace lubricants, periodic checks to clear. As a maintenance issue, bearing rotation, vibration, temperature, lubrication, and so on.
SKF bearing maintenance and judgment: to determine whether it can be used after cleaning check the bearing bearing removal. Check the roller, roller, surface condition, cage wear, bearing clearances and improved dimensional accuracy, unrelated to the injury, the exception. Non-separation of small ball bearings, the inner ring, the level of support with one hand, rotate the outer ring to confirm success. Separation of tapered roller bearings and other bearings, rolling body Raceway in the outer ring surface was examined. Large bearings, because they can't rotate, check rolling body Raceway, cage, wall, such as appearance, bearing with high importance to be checked more carefully.
By SKF bearings failure, and deterioration of performance parameters to judge and predict the reliability and performance of the bearings, parts of the abnormal situation, causes and risks to be identified and judged, decided to fix and improve methods of integrated technologies. So bearing fault detection of the fault diagnosis technology of not merely (or monitoring) technology, it is not just a spot inspection instrumentation. Acquisition signal correctly, quickly and effectively, data processing, manual or automatic identification and judging. In order to determine the repair cycle of science, should also be based on various types of failure mechanisms, for the necessary tests and estimate of fatigue, wear life.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4940 NTN | 200 | 280 | 80 |
| NNU4938K NTN | 190 | 260 | 69 |