ISO 21940-12:2016根据转子的特性和平衡要求，介绍了具有灵活性能的转子的典型配置，描述了平衡程序，规定了最终平衡状态的评估方法，并建立了平衡质量标准指南。 ISO 21940-12:2016还可以作为更深入调查的基础，例如，当需要更准确地确定所需的天平质量时。如果适当注意指定的制造方法和平衡公差，则可以预期令人满意的运行条件。 ISO 21940-12:2016不作为任何转子的验收规范，而是说明如何避免严重缺陷和不必要的限制性要求。 结构共振及其修改不在ISO 21940本部分的范围内。 给出的方法和标准是通用工业机械经验的结果。 它们可能不直接适用于专用设备或特殊情况。因此，在某些情况下，可能会偏离ISO 21940的这一部分。

ISO 21940-12:2016 presents typical configurations of rotors with flexible behaviour in accordance with their characteristics and balancing requirements, describes balancing procedures, specifies methods of assessment of the final state of balance, and establishes guidelines for balance quality criteria. ISO 21940-12:2016 can also serve as a basis for more involved investigations, e.g. when a more exact determination of the required balance quality is necessary. If due regard is paid to the specified methods of manufacture and balance tolerances, satisfactory running conditions can be expected. ISO 21940-12:2016 is not intended to serve as an acceptance specification for any rotor, but rather to give indications of how to avoid gross deficiencies and unnecessarily restrictive requirements. Structural resonances and modifications thereof lie outside the scope of this part of ISO 21940. The methods and criteria given are the result of experience with general industrial machinery. It is possible that they are not directly applicable to specialized equipment or to special circumstances. Therefore, in some cases, deviations from this part of ISO 21940 are possible.