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Rolling use a variety of mechanical equipment, bearing conditions required increasingly stringent market requirements for equipment and other property, performance is also becoming more diverse. Order from a large number of structures, sizes, choose the most suitable bearing, requires a different angle. To select a bearing, generally considered as a bearing, the difficulty of installation and removal arrangement, bearing size and bearing of the market, such as space permits, generally determines the bearing structure. Using a variety of mechanical design life and a variety of durable bearing bearing restrictions comparative study, also decided bearing size. In the choice of bearings, bearings tend to believe that aging occurs in the grease life, fatigue life of the grease, abrasion, noise, also need to be fully studied.
In addition, depending on the purpose, it is necessary to choose for accuracy, clearance, cage structures, grease and other requirements, specially designed bearings. However, selecting the bearing and not a certain order, rule, priority should be given bearing the required conditions, performance, and related matters, especially practical. In order to remain intact as long as possible, the raw performance of the bearing, to keep, maintain, in the first place, in order to prevent accidents, ensure the reliability of operation, improve productivity, the economy. Corresponding mechanical operation and maintenance operating standards, on a regular basis, the best conditions. Including monitoring of operation to supplement or replace the lubricant, regularly check cleared. As a maintenance operation, which has been rotating bearing sound, vibration, temperature, lubrication conditions, and the like.
Bearing cleaning: Remove the bearing repair the appearance of the first record bearing, confirm the remaining amount of the lubricant, the lubricant used after sampling inspection, cleaning bearings. As a cleaning agent, general use gasoline, kerosene. Remove the bearing cleaning, washing and finish washing sub thick, is placed in a container, the end of the first metal net, so that dirt does not directly contact with the bearing container. Rough wash, if the bearing rotation dirt, damage the bearing rolling surfaces, should be noted. In the crude oil washing, use a brush to remove grease, adhesive material, generally clean, wash into a fine. Sperm washing is to wash the oil on one side of the bearing rotation, while carefully cleaned. In addition, cleaning the oil must be kept clean
Bearing maintenance and judgment: To determine whether available for inspection after cleaning Bearing Removal bearings. Check the roller, roller, the surface state, the cage wear, bearing clearance and improved dimensional accuracy, has nothing to do damage, abnormal. Non-separable small ball bearings, inner ring, the level of support with one hand, rotate the outer ring confirmation smoothly. Tapered roller bearings and other separation-shaped bearing, you can scroll the body, the outer ring raceway surface was examined. Large bearings, because they can not rotate by hand, be careful to check the rolling element raceways, cages, walls, as the appearance of a higher bearing importance to closer examination.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7917C NSK | 85 | 120 | 18 |
| 7917A5 NSK | 85 | 120 | 18 |