This International Standard specifies the characteristics, boundary dimensions, tolerances, internal clearances and
permissible loads of inch series, double-row, self-aligning, sealed, heavy duty ball bearings with increased precision
and reduced internal dearances used in airframe applications. These bearings are full complement (without cage)
with a double row of bails. 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 aircraft structure and their control surfaces.