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NSK can determine bearing under removal when in use, to check the outer spherical bearing cleaning, carefully check the raceway surface, rolling surface, with the surface state, cage wear, bearing clearance is increased and injury without affecting the precision drop size, abnormal. Non-separation of small ball bearings, plain end with single hand ring, rotate the outer ring to confirm whether smooth.
Bearings are separable bearings, can check the raceway surface, rolling body of the outer ring.
Because large bearing cannot rotate with the hand, pay attention to check the rolling body raceway, cage, retaining boundary surface appearance, bearing the higher importance need to be cautious inspection.
Judgment bearing will use again, according to the degree of injury, the German NSK bearing mechanical properties, importance, operating conditions, inspection cycle related factors to decide. But when the examination if found to have the following defects, the bearings can not continue to use, need to replace the new outer spherical bearing.
1, the viscosity of lubricating conditions formed between the rolling contact surface of a sufficient to separate the two surface of the lubricating film, lubricant in the normal working temperature must be kept to the minimum viscosity must to reduce friction, high bearing life, the main factors affecting the bearing average diameter and speed influence viscosity viscosity lubricant in work work. Temperature by the temperature T4 ℃called viscosity by viscosity-temperature curve and determine the viscosity ratio is a representation of the oil film forming ability index, with its speed and other factors on the bearing life has a great influence, running state variation ( temperature, speed is reduced, the dye to increase ) outer spherical bearing life may high pollution, decrease.
Calculation method of calculation and influential factors of 2, bearing life correction coefficient of correction coefficient of correction coefficient of various because of a foundation coefficient calculated bearing life, make the NSK bearings to get a good lubricating conditions, should be greater than or equal to but the viscosity ratio can not be too large, otherwise the increasing viscosity may make the bearing temperature increased. When should be used with extreme pressure additives of lubricating oil in addition dynamic surface pressure will also change the lubricating oil viscosity, symbolic significance in calculating method has to consider the operating conditions ( working temperature influence speed load reproduced size of lubrication conditions on the outer spherical bearing life.
The bearing is set up and reform, the insulating cover, cover a usually with paper or other container cover, a wooden and bamboo or gradually in time send transport. If there is a plastic sheet roller and the tapered roller bearing cup.
Bearing lubrication, to ensure a good effect. Check the lubrication oil pump, pipeline flow spark specifications to ensure adequate supply of oil tank, oil. Lubricating oil is clean and free of dirt, and at the same time the cursor within the scope of the time, and in accordance with the correct gear oil, the oil viscosity checks in winter after about five minutes, in order to check oil level range you can run the oil slowly, said it is necessary to take the compensation level.
To regulate the use of end bearing, has been playing to the outer spherical bearing life. This situation is less, are generally in the operation of production process for a variety of reasons causing damage to the bearing, serious direct bearing scrapped off, the cause of these reasons, installation, use, lubrication of these three aspects, commonly have NSK bearings ring gear side injury caused, the main reason is the lack of lubrication or foreign matter. To solve these problems we must first rule out the cause of the accident, according to several aspects using environment, location, structure and so on to examine a similar accident to happen again, bring needless trouble.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7308ADF NSK | 40 | 90 | 23 |
| 7208CDF NSK | 40 | 80 | 18 |