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Ref. No.: ISO/R22 - 1956 (E)
J
IS0
I N TER N AT1 O NA L OR G A N IZATl ON
FOR STA N DARD IZATl O N
IS0 RECOMMENDATION
R 22
WIDTHS OF FLAT TRANSMISSION BELTS
AND CORRESPONDING PULLEYS
Isf EDITION
November 1956
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 22 was prepared by the Technical Committee
ISO/TC 41, Pulleys and belts (including vee-belts), the Secretariat of which is
held by the Association Française de Normalisation.
It was at its Lisbon meeting in April 1953 that the Committee adopted
the resolutions on which the present Recommendation is based. From then
10 and R 20 series of preferred
on, the chosen values were taken from the R
numbers.
After the Lisbon meeting, the Secretariat circulated a first draft proposal
and subsequently a second one to take account of the few comments received
(unification of tolerances on widths for all possible constituent materials of
pulleys and belts, possibility of adopting some other correspondence than
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provided for ordinary transmissions).
Following the circulation of the second draft proposal, an addition was
made to the footnote to the table of.widths, in an attempt to meet the only
comment received, without compromising the general agreement of the other
Member Bodies who had replied.
The draft thus amended was sent to the General Secretariat, which placed
it before all the IS0 Member Bodies as Draft IS0 Recommendation.
The following 21 (out of a total of 35) Member Bodies approved the Draft
without reserve :
Aus
...