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Ref. NO.: ISOlR 254 - 1962 (E)
IS0
INTERN AT1 ON AL O RG A N IZATl O N FOR STAN DARD IZATlO N
IS0 RECOMMENDATION
R 254
QUALITY, MACHINING AND BALANCING
OF TRANSMISSION PULLEYS
1st EDITION
March 1962
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 254, Quality, Machining and Balancing of Transmission
Pulleys, was drawn up by Technical Committee ISO/TC 41. Pulleys and Belts (Including V-Belts),
the Secretariat of which is held by the Association Française de Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1956 and led, in 1959, to the
adoption of a Draft IS0 Recommendation.
In May 1960, this Draft IS0 Reconimendation (No. 374) was circulated to all the IS0
Member Bodies for enquiry. It was approved by the following Member Bodies:
Australia Finland New Zealand
Argentina France Portugal
Belgium Germany Romania
Brazil Greece Spain
Chile India Sweden
Colombia Israel Switzerland
Czechoslovakia Japan United Kingdom
Denmark Netherlands U.S.S.R.
Two Member Bodies opposed the approval of the Draft:
Hungary, U.S.A.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Coun-
cil, which decided, in March 1962, to accept it as an IS0 RECOMMENDATION.
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ISO/R 254 - 1962(E)
IS0 Recommendation R 254 March 1962
QUALITY, MACHINING AND BALANCING
OF TRANSMISSION PULLEYS
1. SCOPE
The purpose of this IS0 Recommendation is to give some general indications concerning choice
and quality of materials of which the transmission pulleys are composed. It states also prescnp-
tions for machining and balancing these pulleys. *
2. CHOICE AND QUALITY OF MATERIALS
2.1 Pulleys should be made of cast iro
...