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Axial stiffness

Axial stiffness depends on the elastic deformation (deflection) of the bearing under load and can be expressed as a ratio of load to deflection. However, since the relationship between deflection and load is not linear, only guideline values can be provided (→ product table).

These values apply to bearing pairs mounted with a near zero interference fit on a steel shaft, under static conditions and subjected to moderate loads.

More accurate values for axial stiffness can be calculated using advanced computer methods. For additional information, contact the SKF application engineering service.

Comparing same-size bearings, bearing sets comprising three or more bearings provide a higher degree of axial stiffness than sets with two bearings. The guideline values for axial stiffness for these sets can be calculated by multiplying the values listed in the product table, by a factor provided in table 1.

For hybrid bearings, the guideline values for axial stiffness can be obtained in the same way as for bearings with steel balls. However, the calculated value should then be multiplied by a factor of 1,11 (for all arrangements and preload classes).

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