Definition of limit deviation
Limit deviation refers to the algebraic difference obtained from the limit dimension minus its basic dimension. Limit deviation refers to upper deviation and lower deviation. The algebraic difference between the maximum limit dimension minus its basic size is called the upper deviation, and the algebraic difference between the minimum limit dimension minus its basic size is called the lower deviation. The upper and lower deviation codes of the shaft are lowercase letters es, ei; The lower deviation code is indicated by capital letters ES, EI.