When choosing a tap, first of all, you must select the corresponding tap according to the material to be processed. The tool company produces different types of taps according to the different materials to be processed. Pay special attention to the selection.
Compared with milling cutters and boring cutters, taps are very sensitive to the material being processed. For example, the use of taps for machining cast iron to process aluminum parts is likely to cause thread loss, random buckles or even tap breaks, resulting in scrapped workpieces. Secondly, pay attention to the difference between through-hole taps and blind-hole taps. The leading end of the through-hole taps is longer, and the chip removal is the front chip removal. The leading end of the blind hole is shorter, and the chip removal is rear chip removal. For blind holes with through-hole taps, the thread processing depth cannot be guaranteed. Furthermore, if a flexible tapping chuck is used, the diameter of the tap shank and the width of the square should be the same as that of the tapping chuck; the diameter of the shank of the tap for rigid tapping should be the same as the diameter of the spring collet. In short, only a reasonable choice of taps can ensure smooth processing.
