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Selecting bearing size using static bearing capacity?

Date锛2013-10-11 9:16:25

In any one of the following conditions should be selected according to the static load rating bearing size, rather than the calculated bearing life:
1, axle bearing is stationary, but also in continuously or intermittently (impact) under the action of load
2, bearing under load only slowly swinging back and forth, or regulating the movements
3, bearing down load speed is very low (n<10R/min) and just have a very short life (in this case, given the equivalent load p, according to the formula of life will come to a very low requirements for basic dynamic load rating c, so the selected bearing in practice may seriously overload)
4, bearing is rotating, but apart from the need to take outside the normal work load, also bear a heavy shock load
All of the above, can bear the load of the bearing is not depends on the material fatigue, but under load to cause permanent deformation of the extent to which Raceway. In still or slow swinging back and forth bearing loads and shock loads acting on the rotating bearing, may cause the rolling part locations was pressed flat and roller causing indentation. Indentation may be irregularly distributed on the roller, it may also corresponds to the distance between the rolling elements evenly distributed. If the load on the bearing turn after a certain number of laps and deformation will be evenly distributed on the whole raceway. Permanent deformation in the bearing and may lead to increased vibrations, noise and friction. And influence may also cause increased clearance or tie to the shaft and the housing.
These changes to the degree of damage depends on the bearing performance of bearing in a specific application requirements. If you have certain requirements on the following conditions, when selecting bearings, must be sufficiently high static load capacity, in order to ensure that it is not only very slight permanent deformation or deflection occurs:
1, high reliability
2, low noise (as applied to the motor)
3, very low vibration (such as in machine tools)
4, measurement of bearing friction torque (as used in measuring instruments and testing equipment)
5, low starting friction under load (crane)

 

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