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 third edition cancels and replaces the second edition ( ISO 4184:1992 ), which has been technically revised.

The main changes are as follows:

the Scope text has been made succinct to conform with current drafting rules;
a new Clause 4 has been created for details on the requirements covered by this document;
Table 1 on datum width for groove profile (previously appearing in the Scope) has been created;
the normative references list has been updated;
less than or equal to signs have been corrected in Tables 2, 3 and 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.

1 Scope

This document specifies requirements for classical V-belts (those of sections Y, Z, A, B, C, D and E) and narrow V-belts (those of sections SPZ, SPA, SPB and SPC).

2 Normative references

3 Terms and definitions

4 Purpose

5 Datum length, L_{_d}

5.1 General

5.2 Classical V-belts — Sections Y, Z, A, B, C, D and E

5.3 Narrow V-belts — Sections SPZ, SPA, SPB and SPC

6 Tolerances on datum lengths

6.1 Manufacturing tolerances

6.2 Belt matching tolerances of V-belts in the same set

7 Centre distance variations

8 Measuring and checking

8.1 Checking belt length

8.2 Checking centre distance variation

9 Designation and marking

9.1 Designation

9.2 Marking

ISO 4184:2025

Belt drives. Classical and narrow V-belts. Lengths in datum system

Current

Published:

27 Oct 2025

1 Scope