Full definition
International standard specifying dimensions, tolerances, and testing requirements for Poly-V (multi-rib) belts and pulleys — an increasingly common belt type that combines the flexibility of a flat belt with the tracking and traction of a V-belt. Profiles per ISO 9982: PH (1.6 mm rib pitch — very light duty, office equipment), PJ (2.34 mm — light duty, appliances), PK (3.56 mm — the dominant automotive profile, serpentine belts), PL (4.70 mm — medium industrial), and PM (9.40 mm — heavy industrial). ISO 9982 defines: rib geometry and dimensions, belt width (designated by number of ribs × profile, e.g., 6PK2120 = 6 ribs, PK profile, 2,120 mm effective length), pulley groove profile and dimensions, and test methods. Complements DIN 7867 (German Poly-V standard, largely harmonized with ISO 9982). Poly-V belts are the fastest-growing belt type, replacing individual V-belts in many applications due to: higher efficiency (97-98%), thinner/more flexible construction, ability to drive multiple accessories from one belt (serpentine), and tolerance of smaller pulleys. Per ISO 9982:2019. For automotive serpentine belts, the PK profile is universal; for industrial applications, PJ, PL, and PM profiles are growing rapidly.