ISO 21940-11 Mechanical Vibration, Rotor Balancing, Part 11: Standard Test for Rotors with Rigid Behavior

EUROLAB laboratory provides testing and compliance services within the scope of ISO 21940-11 standard. ISO 21940-11 specifies procedures and unbalance tolerances for balancing rotors with rigid behavior.

• The size of the allowable balance imbalance;
• The required number of correction planes;
• Allocation of allowable residual imbalance to tolerance planes;
• How to account for errors in the balancing process.

ISO 21940-11 does not cover balancing rotors with flexible behavior. Procedures and tolerances for rotors with flexible behavior are covered in ISO 21940‑12.

Balancing machines available today allow residual unbalances to be reduced to very low limits. Therefore, a balancing quality requirement must be specified for a balancing task, as in most cases it will not be cost-effective to reduce unbalance to the limits of the balancing machine.

In addition to determining an unbalance tolerance, it is necessary to take into account the errors introduced by the balancing process. This standard takes into account the impact of these errors in order to make a clear distinction between the specified allowable residual unbalance and the reduced residual unbalance values ​​that will be obtained during the balancing process.

EUROLAB assists manufacturers with ISO 21940-11 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.