This standard specifies the characteristics of rigid double row ball bearings in steel , cadmium plated, 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 ℃ to + 150 ℃. However, being lubricated with the following greases :
- very high pressure grease, ester type (code A), operational range - 73 ℃ to + 121 ℃or
- very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 ℃ to + 177 ℃ (see EN 3280),
their field of application when lubricated with code A grease is limited to + 121 ℃.
note:1) For new design, use preferably bearings in corrosion resisting steel, see EN 3058.
BS EN 3057:1994 history
1994BS EN 3057:1994 Bearings, airframe rolling - Rigid double row ball bearings in steel, cadmium plated - Dimensions and loads