本标准规定了耐腐蚀钢中带法兰外圈的自调心双列球轴承的特性，内部间隙减小，设计用于承受负载下的缓慢旋转和振荡。 它们旨在用于飞机结构的固定和移动部件及其控制机构之间。 它们旨在在温度范围内使用: - 54°C至150°C。 然而，用以下润滑脂润滑: 极高压油脂，酯型（代号A），操作范围 - 73°C至121°C或 非常高压油脂，合成碳氢化合物，通用（代码B），工作范围 - 54°C至177°C（见EN 3280）， 当使用代号A润滑脂进行润滑时，其应用领域限制在121°C

This standard specifies the characteristics of self-aligning double row ball bearings with flanged outer ring in corrosion resisting steel, reduced internal clearance, designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. They are intended to be used in the temperature range: - 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.