In Reply to: thread chasers 2 posted by dave#1 on January 27, 2016 at 07:45:04:
I've just been using my old regular taps for many years. Most of my taps will be resharpened a few times. It only takes a minute or two to file the cutting edges with the right file. Taps eventually become thread chasers when I get new ones. I've never had any issue with a proper size tap or die removing more material than the original that made the threads. A decent tap and die set will not make threads any larger unless forced. Some of the cheap sets might be built to cut a looser "fit" tolerance. All bets are off when using cheap tools.