Drilling and Tapping

Up to now I’ve always done the traditional hole tapping sequence.  Use a drill to make an undersized hole, dig out the relevant tap and cut threads.

Then I found THESE on eBay purely by chance.  You know what it’s like sometimes searching for something, unless you know some magical key words you’ll get all the usual dross turn up.  Try it, search for Drill and Thread Tap and you’ll see what I mean.

Anyways, I ordered one to try out which turned up on Saturday, and WOW.  Why had I never seen these before??

I’ve since knackered the … Continue reading