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The pipe is 3/16 but both threads in the picture are 26 tpi.

Here are pictures! My apologies for not coming back to this thread before now. I was away from home with only a tablet and while I could read your replies I could not post. Thanks for all of the suggestions. No actual, "use x size drill" but clearly it is a rare circumstance. I think I may need...

I am replacing the nut; the very complicated male fitting already exists and the setup probably worked because the device is 80 years old. I have read that tapered fittings seal better than parallel. I understand the timing issues with making the taper tighten at the right moment. My question...

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

Project of the Month seems too small. Project of the year..?

Terry, thanks for the fun. I've rarely seen such skill and reasoning power... Chris

A Loctite rep came to a club I was a member of to give a lecture about twenty years ago. His message to us cheapskates was; Permatex is Loctite, they renamed it so they could keep the top end of the market with Loctite but not miss out on the people who would or could not pay so much.

I think Taig is more of an issue in Northern Ireland than in Ireland itself. The most amusing example I have heard was the Mitsubishi Pajero. Wouldn't fly in Mexico and further south. Also the first time I saw a Honda Lead(a small scooter) I saw it as the metal rather than being in front.

Yes, it has caused me trouble on one occasion; most of my clients are Irish...

Thanks for your kind words. In relation to your harp project, around 1980 somewhere I read a book, (might have been called Jupiter's Travels) about a guy who rode a Triumph motorcycle around the world, a great exercise in patience. The thing I recall most clearly was his declaration, "the...

My machining time is taken up by my work http://www.concertina.com.au/Concertinaphotos.html at the moment but one of these days when it is not there will be a few steam engines coming out of the shed... Cheers Chris

Just saying...

More thanks Phil, relaxing on the major diameter left me a decent thread...

Phil, Thanks for the thought. It is a M2.5 die and the material is steel, and it is true I was trying to make the thread as close to 2.5 as possible in the hope of making a stronger thread. I think imperial in small sizes, so the turned size was 98 thou. I will try it again with about 95thou...

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..?

Mmm... suspect you might mean .1mm.

I was not there for the main event but saw some of the ramifications. On a gas platform off the NZ coast decades ago they were installing a new pump. The pump was made from phosphor bronze (because it doesn't spark when you hit it, handy on a gas platform) and aside from costing a fortune, it...

This makes no sense to me, perhaps the email address is not the help one. I have never not had a response by 24 hrs...

Sheetcam doesn't have 3D capacity but it is not very expensive. It also has terrific support. Emailed replies from the author come within 24 hrs and usually sooner. He will write a post processer for any non compliant machine. The program is being continually developed; its about twice the size...

When my files become clogged with solder I put them under the stereo microscope) and chase the grooves individually with the end of a scalpel blade. It takes about 6 ot 7 minutes to do the whole file. When I get them clogged with brass it takes a little longer. The stereo microscope has...