This International Standard specifies methods of calculating the basic static load rating and the staticequivalent load for rolling bearings within the size ranges shown in the relevant International Standards,manufactured from good quality hardened steel, in accordance with good manufacturing practice andbasically of conventional design as regards the shape of rolling contact surfaces. Calculations carried out in accordance with this International Standard do not yield satisfactory results for bearings in which, because of application conditions and/or because of internal design, there is a considerable truncation of the area of contact between the rolling elements and the ring raceways. The same limitation applies where application conditions cause deviations from a normal load distribution in the bearing, for example misalignment, preload or extra large clearance. Where there is reason to assume that such conditions prevail, the user should consult the bearing manufacturer for recommendations and evaluation of static equivalent load. This International Standard is not applicable to designs where the rolling elements operate directly on a shaft or housing surface, unless that surface is equivalent in all respects to the bearing surface it replaces. Double-row radial bearings and double-direction thrust bearings are, when referred to in this International Standard, presumed to be symmetrical.

First published as AS 4171-1994.