BS ISO 9981:2020 Belt drives一Pulleys and V-ribbed belts for the automotive industry一PK profile: Dimensions.
1 Scope
This document specifies the principal dimensional characteristics of V-ribbed pulley groove profiles, together with the corresponding endless V-ribbed belts of P1< profile which are used predominantly for automotive accessory drive applications.
This document does not apply to the complete array of V-ribbed belts and pulleys of PH, PJ, P1<, PL and PM profile for industrial and other non-automotive applications which are covered by ISO 9982. P1< belt profile dimensions and tolerances are the same in both International Standards.
&Z and of this document do not apply to elastic belts.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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— IEC Electropedia: available at
4 Symbols
For the purpose of this document, the symbols given in Table 1 apply.
BS ISO 9981 pdf download.