Reference profile
- Designation
- ISO 21940
- Title
- Mechanical Vibration — Rotor Balancing
- Issuing body
- ISO
- Current edition
- [verify]
- Status
- Library record: reviewed; official standard status [verify].
- Category
- Rotating Equipment
1
Overview
Standard series for rotor balancing, including balance quality grades (e.g. G2.5) and tolerances.
2
Scope & Applicability
Covers
- Balance quality grades
- Permissible unbalance
- Balancing procedures
Does NOT cover (exclusions)
- Exclusions are not documented in this library record. Confirm the official publication, neighbouring codes, the adopted edition, and jurisdictional boundaries before application.
3
Key Requirements
Lifecycle requirements
- Rotor balancing acceptance
- Balance grade specification
4
Technical Details
Standard series for rotor balancing, including balance quality grades (e.g. G2.5) and tolerances.
Components: Rotor, Balance plane, Balance quality grade.
Where to find it in the codeRefer to the official table of contents and the sections cited by the project specification; section numbering can vary by edition.
5
Engineering Notes
- Balance grade (e.g. G2.5 for process machinery) sets the permissible residual unbalance.
6
Related Standards
7
Source, Edition & Status
- Publisher
- ISO
- Edition Year
- N/A
- Industries
- Refinery, Petrochemical, Power
- Content Status
- reviewed
- Last Reviewed
- 2026-07-01
- Last Updated
- 2026-07-01
- Verified By
- Engineering Reviewer
- Official Link
- N/A
This paraphrased summary is a discovery aid. Do not reproduce or substitute it for the copyrighted official publication or jurisdictional requirements.