UNI ISO 21940-21 : 2013
Current
The latest, up-to-date edition.
MECHANICAL VIBRATION - ROTOR BALANCING - PART 21: DESCRIPTION AND EVALUATION OF BALANCING MACHINES
24-01-2013
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 ARP4162B | 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 |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.