Hi,
I hope someone here can give me a crash course on thread tapping. I have to tap my Simworld knobs and I borrowed this utterly crappy tap and die set from a friend. I drilled a 3,2mm hole for a 4 mm tap and screwed the M4 x 7 (?) tap through. But, the M4 set screw didn't fit. It was too small and just fell through the hole.
So that was one knob (half) ruined and before I ruin any more of them I thought I'd ask if anybody knew what could have gone wrong.
Thanks in advance.
Martin