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ISO 21940-32:2012

Current
Current

The latest, up-to-date edition.

Mechanical vibration — Rotor balancing — Part 32: Shaft and fitment key convention
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

16-03-2012

Preview

ISO 21940-32:2012 specifies one convention for balancing the individual components (shaft and fitments) of a keyed rotor assembly. This provides compatibility of all balanced components so that when they have been assembled the overall balance tolerance and/or vibration limit for the rotor assembly is met.

ISO 21940-32:2012 specifies that half-keys be used when balancing the individual components of a keyed rotor assembly. It also specifies a marking of the components balanced in accordance with the key convention used.

ISO 21940-32:2012 applies to rotors balanced in a balancing machine, in their own bearings or in situ. The key convention can also be applied when measuring the residual unbalance and/or vibration of rotors with keyways, but to which fitments have not yet been assembled.

In addition to applying to keys of constant rectangular or square cross-section mounted parallel to the shaft centreline, ISO 21940-32:2012 also applies to keys mounted on tapered shaft surfaces, to woodruff, gibhead, dowel and other special keys. The principle of the half-key convention is applied as is appropriate to the particular shape and location of the special key.

DevelopmentNote
Supersedes ISO/FDIS 21940-32 and ISO 8821. (03/2012)
DocumentType
Standard
Pages
16
PublisherName
International Organization for Standardization
Status
Current
Supersedes

Standards Relationship
SS-ISO 21940-32:2021 Identical
DIN ISO 21940-32:2012-08 Identical
UNI ISO 21940-32 : 2012 Identical
BS ISO 21940-32:2012 Identical

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