本文件规定了平衡刚性转子的程序和不平衡公差。它规定 a） 允许残余不平衡量的大小，b）必要数量的校正平面，c）将允许残余不平衡量分配到公差平面，以及d）如何解释平衡过程中的误差。 注:在ISO 21940-14中，详细考虑了平衡误差的评估。ISO 21940-1介绍了转子平衡的基本原理。 本文件不包括挠性转子的平衡。ISO 21940中论述了挠性转子的程序和公差- 12.

This document establishes procedures and unbalance tolerances for balancing rotors with rigid behaviour. It specifies a) the magnitude of the permissible residual unbalance,b) the necessary number of correction planes,c) the allocation of the permissible residual unbalance to the tolerance planes, andd) how to account for errors in the balancing process. NOTE In ISO 21940-14, the assessment of balancing errors is considered in detail. Fundamentals of rotor balancing are contained in ISO 21940-1, which introduces balancing. This document does not cover the balancing of rotors with flexible behaviour. Procedures and tolerances for rotors with flexible behaviour are dealt with in ISO 21940-12.