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Equivalent static bearing load

Static loads comprising radial and axial components must be converted into an equivalent static bearing load. This is defined as that hypothetical load, (radial for radial bearings and axial for thrust bearings) which, if applied, would cause the same permanent deformations in the bearing as the actual loads to which the bearing is subjected. It is obtained from the general equation


P0=equivalent static bearing load [kN]
Fr=actual radial bearing load (see below) [kN]
Fa=actual axial bearing load (see below) [kN]
X0=radial load factor for the bearing
Y0=axial load factor for the bearing


When calculating P0, the maximum load that can occur should be used and its radial and axial components (fig 1) inserted in the equation above. If a static load acts in different directions on a bearing, the magnitude of these components will change. In these cases, the components of the load giving the largest value of the equivalent static bearing load P0 should be used.
Information and data necessary for the calculation of the equivalent static bearing load can be found in the introductory text to each product section and in the tables.
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