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Can anyone clue me in on how to use a tapered tap? The thread is BSBT 5/16”. I have not yet seen the tap, does one act in the same way as a parallel tap? Use the same drilling size? I need to make a blind nut with a hole in the blind end for the flared pipe to extend through. Best Chris

Just saying...

I have a smalal button die which works perfectly until I back it off at which point it destroys the thread. I have looked closely at the cutting edges and it looks OK, but something is wrong. Is this a common thing with a typical cause..?

It all started when Ashley next door showed me his... Mamod. That would have been in about 1959. I really wanted it, or one just like it. Fast forward about fifty years (I didn't, real time all the way, took ages...) and I am watching Tv, what do I see but a similar engine. Light bulb goes on in...

I am thinking of buying a Bolton No 7 kit from EJ Winter. Although it seems to have been around for a long time I can find very few references to people making them. It is quite expensive ($400) so I am wondering if anyone here has assembled one? Are they good? How hard is it? Does it need any...