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Ref. No.: ISO/R155-1960(E)
IS0
I NT ERN AT1 ON A L
O RG A N IZ AT1 O N
FO R STA N DARD IZATl O N
IS0 RECOMMENDATION
R 155
LIMITING VALUES
FOR THE ADJUSTMENT OF CENTRES
FOR TRANSMISSION PULLEYS
1st EDITION
March 1960
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 155, Limiting Values for the Adjustment of Centres for Trans-
mission Pulleys, was drawn up by Technical Committee ISO/TC 41, Pulleys and Belts (including
vee-belts), the Secretariat of which is held by the Association Française de Normalisation
(AFNOR).
The study of the limiting values for the adjustment of centres for grooved pulleys was under-
The corresponding study for flat belt pulleys
taken by Working Group No. 1 already in 1954.
was begun in 1956 by Working Group No. 2.
It was during its third meeting, held in Stockholm in June 1955, that the Technical Com-
mittee adopted a resolution upon which was based the development of the part of the IS0 Recorn-
mendation dealing with grooved pulleys. As for flat belt pulleys, it was during its fourth meeting,
held in Milan in June 1957, that the Technical Committee adopted a resolution upon which the
development of this part of the IS0 Recommendation was based.
A draft proposal was thereupon set up by the ISO/TC 41 Secretariat and circulated in
March 1958 to the members of the Technical Committee, at which ti
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