Difference between additional dynamic load and additional static load of SKF bearing

July 30, 2019

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Difference between additional dynamic load and additional static load of SKF bearing

Source: China Bearing Network Time: 2013-10-27
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Q: SKF bearing ~ fixed load Cr (N); ~ fixed static load Cor (N) What is the difference?
Is the dynamic load the load accepted by the SKF bearing when the equipment is working?
Answer: 1. Additional radial (or axial) dynamic load: refers to the theoretically acceptable stable radial load (or stable axial load) of the tumbling SKF bearing. The effect of the SKF bearing under this load; the extra of the SKF bearing The life span is one million revolutions. This is the first performance of SKF bearings to withstand the tumbling fatigue.
The fundamental extra dynamic load of the centripetal SKF bearing and the thrust SKF bearing is distinguished from the radial fundamental extra dynamic load and the axial fundamental extra dynamic load; indicated by Cr and Ca.
Second, the radial (or axial) fundamental additional static load: refers to the radial static load (intermediate axial static load) that occurs with the following accounting touch stress in the middle of the maximum load rolling body and the raceway touch. Ball SKF bearing; 4600MPa, about other types of centripetal ball SKF bearings and thrust ball SKF bearings; 4200MPa, about centripetal and thrust roller SKF bearings; 4000MPa.
The total amount of permanent deformation of the rolling body and the raceway occurring under these contact stresses is about 0.0001 times the diameter of the rolling body.
SKF bearings accept excessive static load or receive impact load at low speed; partial deformation of the rolling surface of the rolling body and the raceway will occur. The amount of deformation increases with the increase of load; beyond the limit; Affects normal rotation. The fundamental additional static load of the SKF bearing and the thrust SKF bearing is the radial extra static load and the axially additional static load; indicated by Cor and Coa.
The additional dynamic load and the additional static load are different from each manufacturer; the values ​​are also different. The values ​​of each manufacturer are recorded in their respective samples. During the process of drawing the equipment; the load accepted by SKF bearings is not The additional dynamic load of the SKF bearing; it should be the radial or axial load on the SKF bearing.
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