This standard specifies the characteristics of single row self-aligning roller bearings in steel 11 of diameterseries 3 and 4 ZI designed to withstand only slow rotations, oscillations and/or swwelbng under load.They ere intended for use between fixed and moving parts of the a}rcratt structure andThen control mecharosms.The airframe rolling bearings defined inThis standard are used from一54 0C to+150 0C.However, being lubricated withThe following greases: 一very high pressure grease, ester type Icode A), operational range一73 0C to+121 0C or ·very high pressure grease, synthetic hydrocarbons, general purpose Icode B), operational range 一54 0C to } 177 0C (see EN 32801,their field of application when lubricated wnh code A grease is limited to+121 0C.