ISO 4183:2026

International
Standard
ISO 4183
Fourth edition
Belt drives — Classical and narrow
2026-01
V-belts — Grooved pulleys (system
based on datum width)
Transmissions par courroies — Courroies trapézoïdales
classiques et étroites — Poulies à gorges (système basé sur la
largeur de référence)
Reference number
© ISO 2026
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Preliminary notes . 2
6 Groove angles . 2
7 Dimensions of the groove profiles . 2
8 Datum diameters . 3
8.1 Series of datum diameters .3
8.2 Groove angles in relation to given datum diameters .6
8.3 Minimum datum diameters .6
8.4 Differences between datum diameters of any two grooves .7
9 Quality, surface finish and balancing of pulleys . 7
10 Inspection . 7

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts),
Subcommittee SC 1, Friction.
This fourth edition cancels and replaces the third edition (ISO 4183:1995), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— addition of Clause 4;
— removal of parameters t for A and B in the Figure 1 along with notes 1 and 2;
— removal of Table 1 since datum width values are also shown in Table 2;
— merging of classical and narrow V-belts under the groove profile column in Table 3, and addition of a new
column titled "Tolerance";
— removal of "for use with V-belts" in the first column heading of Table 4.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 4183:2026(en)
Belt drives — Classical and narrow V-belts — Grooved pulleys
(system based on datum width)
1 Scope
This document specifies the principal dimensions of grooved pulleys for classical V-belts (sections Y, Z, A, B,
C, D, and E) and narrow V-belts (sections SPZ, SPA, SPB, and SPC) specified in the terminology system based
on datum width.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 3,
...