BS ISO 235:2016规定了以下三种类型钻头的尺寸:直柄钻头、短柱系列；jobber系列直柄钻头；莫氏锥柄钻头。对于上述每种类型的钻机，其包括三个表格，分别给出:尺寸单位为毫米；尺寸单位为英寸；相应的长度，以毫米和英寸为单位，作为直径台阶的函数。交叉引用:ISO 296ISO 13399购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS ISO 235:2016 specifies the dimensions of the following three types of drills:parallel shank drills, stub series;parallel shank drills, jobber series;Morse taper shank drills.It comprises, for each type of drill mentioned above, three tables giving, respectively:the dimensions in millimetres;the dimension in inches;the corresponding lengths, in millimetres and in inches, set out as functions of diameter steps.Cross References:ISO 296ISO 13399All current amendments available at time of purchase are included with the purchase of this document.