EDM thread

When machining threaded holes, machining centers or tapping equipment are usually used, but manual tapping is sometimes used. When machining external threads, lathes, taps and comb cutters are generally used for machining. It can be seen that the threads that can be processed by cutting generally do not need to be processed by EDM machine tools. The reason is that machining a screw hole can be completed in tens of seconds to several minutes; while EDM is inefficient, it usually takes tens of minutes. However, sometimes there is a problem that machining cannot be performed, such as ignoring the tapping and then quenching the workpiece first, or the need to tap directly on the carbide workpiece.