scope:

This standard specifies the characteristics of double row self-aligning ball bearings in corrosion resisting steel of diameter series 2 designed to withstand only slow rotations, oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their mechanisms. The airframe rolling bearings defined in this standard are used from -54°C to +150°C. However, being lubricated with the following greases: - very high pressure grease, ester type (code A), operational range -73°C to +121°C or - very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range -54°C to +177°C, their field of application when lubricated with code A grease is limited to +121°C.