Mechanical vibration. Rotor balancing Shaft and fitment key convention

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-04-2012

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Half-key convention
5 Marking
6 Implementation of the half-key convention
Annex A (normative) - Specifications for the half-key
        convention
Annex B (informative) - Practical considerations for
        making half-keys and usage of keys
Annex C (informative) - Comparison between shaft and
        fitment key conventions
Bibliography

Describes one convention for balancing the individual components (shaft and fitments) of a keyed rotor assembly.

This part of ISO21940 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.

This part of ISO21940 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.

This part of ISO21940 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, this part of ISO21940 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.

Committee	GME/21/5
DevelopmentNote	Supersedes BS 7130(1989). (04/2012)
DocumentType	Standard
Pages	28
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 7130:1989

Standards	Relationship
ISO 21940-32:2012	Identical

DEFSTAN 02-327/4(2016) : 2016

STANDARDS FOR DEFENCE REQUIREMENTS AND GUIDANCE FOR THE PROCUREMENT OF PUMPS FOR AUXILIARY SYSTEMS

ISO 1925:2001	Mechanical vibration Balancing Vocabulary
IEC 60034-14:2003+AMD1:2007 CSV	Rotating electrical machines - Part 14: Mechanical vibration of certain machines with shaft heights 56 mm and higher - Measurement, evaluation and limits of vibration severity

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BS ISO 21940-32:2012

Mechanical vibration. Rotor balancing Shaft and fitment key convention

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