我们在加工刀盘之类的螺钉孔时,需要有柄部很长的丝锥,用一般丝锥时必须把柄部接长后方能攻丝。我们也做过一头冲有内四方的加长柄,由于内四方不易做得很规矩,同丝锥外四方的配合也不紧密,用不了几次后,内四方就挤大了,丝锥在加长柄内晃动,故攻出的丝孔不正,丝锥也极易折断。生产效率较低。最近,我们做了一件丝锥加长柄,既简 When machining screw holes such as cutter heads, we need a long tap with a long handle. When using a normal tap, the handle must be long and then tapping. We have also done a punch in the Quartet plus stem, because the Quartet is not easy to do a lot of rules, with the tap outside the Quartet’s not close, can not use a few times, the Quartet crowded, tap in the long handle Sway, so the attack of the hole is not correct, the tap is also easy to break. Productivity is low. Recently, we made a tap with a long handle, both simple