This International Standard specifies the characteristics, boundary dimensions, tolerances, internal clearances and
permissible loads of inch series, single-row, self-aligning, sealed, heavy duty ball bearings used in airframe
applications. These bearings are full complement (without cage) with a single row of balls. These bearings are
designed to withstand only slow rotations and oscillations under radial load and are intended for use between fixed
and moving parts of an aircraft structure and their control surfaces.