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Member postings for David Noble

Here is a list of all the postings David Noble has made in our forums. Click on a thread name to jump to the thread.

Thread: Tapping drill size
20/10/2019 12:07:35
Posted by Martin Shaw 1 on 20/10/2019 10:35:41:

Who knew threads could be so complex.

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

Thread: Bearing fit
18/10/2019 18:28:27
Posted by Ian Thomson 2 on 18/10/2019 17:02:11:

I will start you off easy - they will get harder.

laugh

18/10/2019 16:46:11

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

David

Thread: An interesting repair to an Hour Wheel
13/10/2019 18:06:31

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

David

Thread: Bright EN24T steel vs Black EN24T for cutting gears
10/10/2019 08:42:33

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

David

Thread: Clock #1
04/10/2019 09:01:12
Posted by gerry madden on 03/10/2019 10:40:51:

Nice work Mr N ! And some interesting details there, in particular the pendulum 'hanging by a thread'. I haven't seen this before but might have read about such things. While this 'might' have some advantages over something more conventional, I'm wondering if the thread material is reliable in terms of fatigue. It would be interesting to hear your thoughts.

Gerry

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

04/10/2019 08:59:04
Posted by Michael Gilligan on 04/10/2019 08:42:07:

Please forgive the digression, but I thought some members might be interested in this, about Bulle [silk ribbon] Suspension: **LINK**

http://www.horologix.com/bu005_1.html

MichaelG.

 

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

Thread: Closet Machinist
03/10/2019 19:07:30

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

Thread: Clock #1
03/10/2019 14:43:22

Hello Bob,

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

David

03/10/2019 11:58:08

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

03/10/2019 08:33:45
 

Thank you Max  and Bill 

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

Thread: Last Night's Astro Image
22/09/2019 11:32:15

Very, very nice Neil.

Thread: Pivot repair
03/09/2019 23:04:16

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

David

Thread: Fixed steady use
03/09/2019 15:52:04

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

Thread: Mikron F75 Restoration completed.
02/09/2019 19:05:43

Very nice

Thread: Bushing for clock arbor
29/08/2019 09:49:55

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

David

29/08/2019 09:06:00

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

29/08/2019 09:01:04
Posted by Michael Gilligan on 29/08/2019 08:33:04:

 

When doing this by hand: The trick is to file the unworn side od the hole to match ... thus making it oval rather than egg-shaped ... The broach should then self-centre.

 

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

David

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

29/08/2019 08:26:10

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

Thread: English style bracket clock by John Tyler
24/08/2019 09:09:21

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

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