scope:

This standard specifies the characteristics of spherical plain bearings; - with assembly slots - with and without grease holes - with and without lubrication grooves - in steel intended for fixed and moveable structural elements in aircraft and their control mechanisms. The spherical plain bearings defined by this standard are to be used within the temperature range -54 to +150° C. However, because of lubrication with the following greases (see EN 2337): - ester type extreme pressure grease (code A) limits of use -73 to +121° C or - synthetic hydrocarbon extreme pressure grease, for general purpose (code B) limits of use -54 to +177° C, their field of application in the case of lubrication with grease A is limited to + 121° C. In both cases one of the spherical surfaces shall be smeared with a dry film lubricant (anti-seize treatment)