Name: UNI ISO 21940-21 : 2013
Brand: UNI

MECHANICAL VIBRATION - ROTOR BALANCING - PART 21: DESCRIPTION AND EVALUATION OF BALANCING MACHINES

Published date

24-01-2013

Publisher

Ente Nazionale Italiano di Unificazione (UNI)

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Capacity and performance data of the
   balancing machine
5 Machine features
6 Minimum achievable residual unbalance
7 Production efficiency
8 Performance qualifying factors
9 Installation requirements
10 Proving rotors and test masses
11 Verification tests
Annex A (informative) - Information provided by
        the user to the balancing machine manufacturer
Annex B (informative) - URR limit diagrams
Annex C (informative) - Shafts of outboard proving
        rotors type C
Annex D (informative) - Modifications of proving rotors
        prepared in accordance with ISO 2953:1985
        to this part of ISO 21940
Bibliography

Describes requirements for evaluating the performance of machines for balancing rotating components by the following tests: a) test for minimum achievable residual unbalance, U[mar] test; b) test for unbalance reduction ratio, URR test; c) test for couple unbalance interference on single-plane machines; d) compensator test.

Committee	CT 2
DocumentType	Standard
PublisherName	Ente Nazionale Italiano di Unificazione (UNI)
Status	Current

Standards	Relationship
ISO 21940-21:2012	Identical

ISO 2953:1999	Mechanical vibration Balancing machines Description and evaluation
SAE ARP 4162 : 2017	BALANCING MACHINE PROVING ROTORS
ISO 1940-1:2003	Mechanical vibration Balance quality requirements for rotors in a constant (rigid) state Part 1: Specification and verification of balance tolerances
ISO 1925:2001	Mechanical vibration Balancing Vocabulary