scope:

This standard specifies the characteristics of rigid double row ball bearings in steel designed to withstand only slow rotations and oscillations under load. They are intended for use in the hubs of bell crank levers fitted with a single bearing. 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 (see EN 3280), their field of application when lubricated with code A grease is limited to +121°C.