TS ISO 21940-2

TS ISO 21940-2 is a vocabulary standard for rotor balancing, defining the terms and meanings used in this technical field. It provides a common language for discussing imbalance, vibration and balancing activities in rotating machinery, and it complements ISO 2041, the general vocabulary for mechanical vibration and shock.

Why balancing terminology matters

Rotor balancing is the process of arranging mass distribution in a rotating part so that unwanted forces and vibration during operation are reduced. The subject involves closely related but distinct concepts such as types of unbalance, correction planes, measurement results and balancing methods. A vocabulary standard helps keep these terms consistent across design, manufacturing, testing and maintenance contexts.

What this standard covers

• Terms and definitions related to balancing.
• A shared technical vocabulary for rotor balancing.
• Complementary terminology to ISO 2041 for the vibration and shock domain.
• Language support for rotating machinery and its components.

In general technical use, a balanced rotor is central to lower vibration, steadier running and more predictable machine performance, but this document is not a procedure manual. It standardizes names and definitions rather than prescribing a balancing method. That makes it especially useful in maintenance, machine design, measurement and quality documentation where precise terminology is important.