丝锥是机械加工中最常用的工具之一。保证攻丝过程中的垂直度是很重要的。我在生产实践中,采用如图所示带一段导向柱的丝锥,较好地解决了这一问题,即在一般丝锥的前面用工具磨床磨成一小段比钻孔孔径略小于0.02毫米的导向圆柱,这段导向圆柱即保证了丝锥攻丝过程中与螺孔的垂直 Tap is one of the most commonly used tools in machining. It is important to ensure the verticality during tapping. In production practice, I used the tap with a guide post as shown in the figure to solve the problem. In front of the general tap, the tool grinder was used to grind a small segment of guide cylinder slightly smaller than 0.02 mm , This section of the guide cylinder to ensure tap tapping process with the vertical screw hole