BS ISO 3293:2016规定了60°角莫氏锥柄埋头孔的尺寸， 90°和120°包括在内。它仅以公制单位指定尺寸，这些被视为唯一推荐的尺寸 将来，对于切割直径在16 mm到80 mm范围内的埋头钻。给出的尺寸仅适用于由高速钢制成的工具。然而，如果 在生产允许的情况下，柄可以由合适的替代材料制造，例如 碳钢。莫氏锥柄符合ISO 296标准。除非另有说明，否则埋头孔是正确的- 手工切割。直柄埋头孔是ISO 3294的主题。交叉引用:ISO 296ISO 3294ISO 13399购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS ISO 3293:2016 specifies the dimensions of Morse taper shank countersinks for angles 60°, 90° and 120° inclusive.It specifies dimensions in metric units only, these being regarded as the only recommended dimensions in the future, for countersinks with cutting diameters in the range 16 mm to 80 mm.The dimensions given apply only to tools made from high speed steel. However, if the method of production allows, the shanks may be manufactured from a suitable alternative material, such as a carbon steel.The Morse taper shanks are in accordance with ISO 296.Unless otherwise indicated, the countersinks will be right-hand cutting.Parallel shank countersinks are the subject of ISO 3294.Cross References:ISO 296ISO 3294ISO 13399All current amendments available at time of purchase are included with the purchase of this document.