The plain bearings defined by this standard can be used in the temperature range - 54 to + 150 °C. However, being lubricated with the following greases (see EN 2337):
——extreme pressure grease, ester type (code A), operating range - 73 to + 121 °C or - extreme pressure grease, synthetic hydrocarbon type, general purpose (code B), range of use - 54 to + 177 °C, their range of application in the case of lubrication with grease A is limited to 121 °C. In both cases one of the spherical surfaces, at the producer's choice, must be coated with a dry lubricant (anti-seizing treatment).
NBN N 01-013-1988 history
1988NBN N 01-013-1988 Aerospace series - Bearings-spherical plain in steel with assembly slots - Dimensions and loads