05-05-2017, 08:32 AM
The machinists at work use the spiral taps for putting holes in the copper we use as substrates. If you've ever worked with copper, you know it's gummy, and your tools have to be razor sharp. Because of this, they go through taps like chicklets, and I take the "used" ones home. They work fine for anything I do, and because they are free, I'll never go back to regular taps.
Full of ideas, but slow to produce parts