指定锻造轴环柄和相应卡盘衬套的尺寸。给出了五种标称尺寸的数值。第二版取消并取代了第一版（1974年），第一版经过了技术修订（扩大了尺寸范围和锻造轴环内径尺寸规格）。

Specifies the dimensions of both forged collared shanks and corresponding chuck bushings. Values are given for five nominal sizes. This second edition cancels and replaces the first edition (1974), which has been technically revised (extension of the range of sizes and specification of the size of the internal diameter at the forged collar).