ISO 21940-11:2016

ISO 21940-11:2016

November 2016
International standard Current

Mechanical vibration - Rotor balancing - Part 11 : Procedures and tolerances for rotors with rigid behaviour

ISO 21940-11:2016 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, and d) 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 19499 which gives an introduction to balancing. ISO 21940-11:2016 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.

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International ISO standards

Publication date

November 2016

Number of pages

28 p.

Reference

ISO 21940-11:2016

ICS Codes

21.120.40   Balancing and balancing machines

Print number

1
Sumary
Mechanical vibration - Rotor balancing - Part 11 : Procedures and tolerances for rotors with rigid behaviour

ISO 21940-11:2016 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, and

d) 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 19499 which gives an introduction to balancing.

ISO 21940-11:2016 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.

Replaced standards (2)
ISO 1940-1:2003
August 2003
International standard Cancelled
Mechanical vibration - Balance quality requirements for rotors in a constant (rigid) state - Part 1 : specification and verification of balance tolerances

<p>ISO 1940-1:2003 gives specifications for rotors in a constant (rigid) state. It specifies balance tolerances, the necessary number of correction planes, and methods for verifying the residual unbalance.</p> <p>Recommendations are also given concerning the balance quality requirements for rotors in a constant (rigid) state, according to their machinery type and maximum service speed. These recommendations are based on worldwide experience.</p> <p>ISO 1940-1:2003 is also intended to facilitate the relationship between the manufacturer and user of rotating machines, by stating acceptance criteria for the verification of residual unbalances.</p> <p>Detailed consideration of errors associated with balancing and verification of residual unbalance are given in ISO 1940-2.</p> <p>ISO 1940-1:2003 does not cover rotors in a flexible state. The balance quality requirements for rotors in a flexible state are covered by ISO 11342.</p>

ISO 1940-1/AC1:2005
January 2005
International standard Cancelled
Technical corrigendum 1 to standard ISO 1940-1:2003

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