International Organization for Standardization (ISO)
Latest
ISO 22:1991
Scope
Specifies the principal dimensions. Annexes A (recommended crowns of the pulleys) and B (recommended correspondence between the widths of belts and the widths of the pulleys used) are for information only.
ISO 22:1991 history
1991ISO 22:1991 Belt drives; flat transmission belts and corresponding pulleys; dimensions and tolerances
1975ISO 22:1975 Flat transmission belts and corresponding pulleys; Widths