需要钻小孔时,常会遇到小台钻上没有能夹持小直径(例如φ0.3mm)钻头的钻夹头,现介绍一种简单有效的方法如下: 选择几个内管尺寸与钻头直径相近的医用注射针头和钻头试插配,使钻头柄刚好能插入针管,将针管按钻头柄长度(最好比钻头柄稍短一点)截下,再将钻头套在针管内,然后一起装在钻夹头上夹紧,即可钻孔。孔钻毕卸下钻头时,由于不锈钢管壁弹性恢复,钻头很容易从针管中取出。根据需要可以复套两个以 Need to drill small holes, often encounter a small bench drill can not hold a small diameter (for example, φ0.3mm) drill chuck, now introduce a simple and effective method is as follows: Select a few inner tube size and drill diameter Similar medical needles and drill bit fitting test, the drill shank just inserted into the needle tube, the needle according to the length of the shank (preferably a bit shorter than the bit shank) cut off, and then bit set in the needle tube, and then installed together Clamping drill chuck, you can drill. When the drill bit is removed, the drill bit is easily removed from the needle tube due to the elastic recovery of the stainless steel tube wall. According to the needs of the two can be set