IS 15149 : 2025/ISO 9981 : 2020 Belt Drives - Pulleys and V-Ribbed Belts for the Automotive Industry - PK Profile - Dimensions
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical to ISO 9981 : 2020 'Belt drives - Pulleys and V-ribbed belts for the automotive industry - PK profile: Dimensions' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Conveyor Belts Sectional Committee and approval of the Production and General Engineering Division Council.
This standard specifies the principal dimensional characteristics of V-ribbed pulley groove profiles, together with the corresponding endless V-ribbed belts of PK profile which are used predominantly for automotive accessory drive applications.
This standard does not apply to the complete array of V-ribbed belts and pulleys of PH, PJ, PK, PL and PM profile for industrial and other non-automotive applications which are covered by ISO 9982. PK belt profile dimensions and tolerances are the same in both International Standards.
This Indian Standard was first published in 2002. This revision brought out to align the standard with ISO 9981 : 2020.
The major changes in this revision are as follows:
a) Clarifications have been made where the standard is not for elastic belts;
b) 5.3.5 has been revised to reference ISO 254 for pulley roughness;
c) The current roughness values have been removed; and
d) The maximum pulley groove radius (Table 2) has been specified.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.