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Kaydon Bearings white papers

Kaydon's new capacity calculations for thin-section bearings

Many thin-section bearing catalogs report basic dynamic radial load ratings based on ABMA standard 9 and ISO 281. ABMA standard 9 and ISO 281 give equations for calculating load ratings based on a number of assumptions, many of which are not valid for thin-section bearings. (Thin-section bearings are described in ABMA standard 26.2).

Kaydon's method for calculating the dynamic radial load ratings for thin-section ball bearings is more accurate. This method uses the contact stress and the number of stress cycles per revolution to calculate the capacity. The new numbers are based on five years of actual test results. These equations can also be used to calculate the dynamic radial load rating for four-point contact ball bearings.

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