Member postings for David Noble

I have spent a lot of time machining threads and before metrication, I had a book around 1 1/2" thick which had a different thread form on each page. A couple of the more interesting ones ( I just had a wry smile thinking what a non engineer would think about an 'interesting' thread form) were a screw thread for a bottle closure and a steam coupling thread for the hose between rail carriages.

David

Yes Ian, that's certainly the approach I would take.

David

Being involved in maintenance engineering for a long time, I think that it's a brilliant repair : )

David

I believe that cold rolled steel has a greater yield and tensile strength due to the manufacturing process.

David

Just in case you haven't seen it Gerry, there is the excellent Clickspring's use of silk thread here:-

https://www.youtube.com/watch?v=R9m4X_R9HPs&list=PLZioPDnFPNsETq9h35dgQq80Ryx-beOli&index=21&t=0s

David

Edited By David Noble on 04/10/2019 09:01:36

No digression at all Michael, very relevant and interesting, I didn't know about that.

David

Edited By David Noble on 04/10/2019 08:59:31

Hello Mark, whatever you decide to make, this is the place for advice. I've had loads 

David

Edited By David Noble on 03/10/2019 19:08:05

Hello Bob,

Fascinating indeed. I think I would have used a different word other than 'seductive' !

David

Hello Gerry, that's not just 'thread' that's 'silk thread' !!

It seems that the idea comes from old french clocks. The odd idea appealed to me so I used it.

The thread is suspended from a screw at the top which can turn to adjust the length of swing for fine adjustments.

As for fatigue, I'll let you know!

David

Thank you Max  and Bill 

Edited By David Noble on 03/10/2019 08:35:13

Very, very nice Neil.

Just to hi-jack the thread, Thank you for the link Michael, very interesting.

David

Would it be possible to put a centre in the end of the bar with an electric drill? I've done this a couple of times successfully.

David

Edited By David Noble on 03/09/2019 15:52:16

Very nice

Hello Alan, that's fascinating, thank you. I wonder where the preacher got its name?

David

Michael, thank you, yes, I understood the emphasis.

Thank you Roy, an end mill would work but I was interested in how a clockmaker would do it.

David

Hello Michael, Ahh! thank you, simple when you know how : )

David

Edited By David Noble on 29/08/2019 09:01:40

When a clock needs bushing, the hole is usually extended to one side. When drilling the hole for the new bush how would you keep the hole in the correct place without allowing the drill to centre itself mid way in the stretched hole?

Thanks, David

Seems strange, I've just had a look at the advertising for the book and it says:-

" However the author has provided instructions which leave nothing to chance. The construction of the fusee in particular is fully covered and two appendices at the end of the book deal with the theory of the curve."

David