本国际标准规定了槽形皮带轮的主要特性（对于槽形截面9N/J， 15N/J和25N/J），用于工业动力传输驱动的单V带和连接窄V带。 附录A中给出了有效直径系列的一些背景信息。 注:槽的有效宽度被视为有效系统中标准化的基本尺寸 槽和相应的窄V形皮带视为一个整体。

This International Standard specifies the principal characteristics of grooved pulleys (for groove sections 9N/J, 15N/J and 25N/J) intended to take both single and joined narrow V-belts for industrial power transmission drives. Some background information on the series of effective diameters is given in annex A. NOTE The effective width of a groove is regarded as the basic dimension of standardization in the effective system for grooves and for the corresponding narrow V-belts considered as a whole.