ruffrecords
Well-known member
For the mods to my Glensound mixer frame I had to cut down some existing extrusion. This meant I needed to tap the holes in the cut ends so I could fix the extrusions into the frame. I have done many taps in sheet metal and with help from Frank Rollen and the right lubricant I can now do this easily in most thin panels in a single pass. I naively assumed a simple single pass tap could be used to cut a half inch long thread in an existing hole in the extrusion but I soon found out this doe not work. So what is the correct way to do this? Will I need first, second and final taps or can I get away with just a pair?
Cheers
Ian
Cheers
Ian