This International Standard specifies the characteristics, boundary dimensions, tolerances, internal clearances and
permissible loads of metric series single-row, self-aligning spherical roller bearings of diameter series 3 and 4, in
accordance with IS0 15, used in airframe applications. These bearings are designed to withstand only slow
rotations and oscillations under load and are intended for use between fixed and moving parts of an aircraf?
structure and their control surfaces.