This standard specifies the calculation method for the basic dynamic load rating and life of spherical plain bearings. This standard applies to radial spherical bearings, angular contact spherical bearings, thrust spherical bearings and rod ends whose size ranges comply with GB/T 9161, GB/T 9162, GB/T 9163, GB/T 9164 and whose technical conditions comply with relevant standards. Spherical bearings. This standard does not apply to spherical bearings with special structures or operating under abnormal conditions of use, such as: special materials, special sliding contact surfaces, special clearances, excessive relative inclination of the inner and outer rings, excessive shaft or seat deformation, etc.