Static load bearing

Calculating the static load safety factor Fs helps determine if the selected bearing has sufficient static load rating.
      FS =CO/PO
      Among them FS static load safety factor, CO rated static load [KN], PO equivalent static load [KN]

      The static load safety factor FS is a safety factor that prevents permanent deformation of the contact area of ​​the rolling parts. For bearings that must run smoothly and have extremely low noise, the value of FS is required to be high; for those with moderate running noise, a smaller FS can be used; the following values ​​are generally recommended:
      FS=1.5~2.5 for low noise level
      FS=1.0~1.5 for regular noise level
      FS=0.7~1.0 for medium noise level

      The rated static load CO[KN] is listed in the table for each type of bearing. The load (radial force for radial bearings and axial force for thrust bearings), the theoretical pressure generated at the center of the rolling element and raceway contact area is:
      -4600 N/MM2 Self-aligning ball bearing
      -4200 N/MM2 Other ball bearings
      -4000 N/MM2 all roller bearings

      Under the action of the rated static load CO, the total plastic deformation generated at the maximum bearing position of the rolling element and the raceway contact area is about one ten thousandth of the diameter of the rolling element. The equivalent static load PO[KN] is a theoretical value, which is a radial force for a radial bearing and an axial and centripetal force for a thrust bearing. The stress generated by the PO at the center of the largest load-bearing contact area of ​​the rolling elements and raceways is the same as the stress generated by the actual load combination.
      PO=XO*F r+Ys*Fa[KN]
      Among them, PO equivalent static load, Fr radial load, Fa axial load, the unit is kilonewton, XO radial coefficient, YO axial coefficient.