Member postings for Michael Gilligan

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I fail to qualify, Dave ... But I am interested

This 'Instructable' includes some useful photos of the Dewhurst switch: **LINK**

https://www.instructables.com/id/Wiring-up-a-Brooke-Crompton-single-phase-lathe-mot/

MichaelG.

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https://misterlinnsworkshop.wordpress.com/2014/03/08/dewhursts-big-switch/... and this post has a decent photo of contact pitting:

Edited By Michael Gilligan on 25/03/2019 18:37:01

< drool >

MichaelG.

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**LINK**

http://neme-s.org/Shaper%20Books/Michael_Moore/shaper%20gear%20cut.pdf

MichaelG.

That's an excellent article, Ian

Thanks for the reference.

MichaelG.

Thanks for the 'closure' Mark

MichaelG.

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Could it be a custom Go/NoGo indicator, for one hole size ?

[Daniel] ... Try putting a micrometer where thumb and finger are currently shown, to check when the lights switch.

MichaelG.

Edited By Michael Gilligan on 23/03/2019 13:52:22

That's looking good, David

This thread should make a useful 'masterclass' reference for some tricky-looking jobs.

MichaelG.

Thanks, Jason ... That would be logical.

I stand guilty of taking Emgee's comment, and Ron's positive response, at face value.

MichaelG.

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[Ron] ... Some pictures & dimensions of those interfaces would be of interest, when you have the opportuniy

Edit: Thanks, Ron ... You beat me to it !!

Edited By Michael Gilligan on 23/03/2019 08:12:29

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Interesting advice

Theory would suggest that this might result in a non-circular cross-section.

MichaelG.

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That is a very good point

... I now wonder why they chose to supply that adapter plate in the 'package'

[Ron] ... Does it have multiple fixing points for alternative chucks, or is it dedicated to that one ?

Just curious

MichaelG.

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Certainly on the large side for making watch parts

... but just right for making parts for watchmaking tools

https://www.horia.ch/en/Products/Polishing-screws/Lathe/Polishing-screws-lathe-in-his-box.html

Perhaps they originally made them for use in-house, and then realised that there was a market.

Clive's comment would appear to support this hypothesis.

MichaelG.

Edited By Michael Gilligan on 22/03/2019 20:20:40

I like that

Maybe designed by someone who owned a Pipe-Cutter ?

MichaelG.

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Edit: https://www.horia.ch/en/Products/Knurlingtools/Knurlingtools/Knurling-tool.html

Edited By Michael Gilligan on 22/03/2019 14:59:45

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You certainly can, Steve ... It might ease my inferiority complex.

MichaelG.

That looks very tidy, Rod

MichaelG.

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Thanks for posting that excellent link, Brian

... It's sure to be useful sometime

MichaelG.

[the proud owner of one of Tony Jeffree's original DivisionMaster units]

Thanks for the report, Robin

MichaelG.

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P.S. ... Not quite up to your hydrogen atoms, but I remember an incoming graduate in the vibration test lab who insisted that his answer was right ... he had calculated that the corners of a 4' square Aluminium alloy 'head expander' for a large shaker [1" plates separated by 4" of honeycomb] would resonate at 4 point something Hz.

From the Assay Office : "In the early days of hallmarking, punches were made by engraving or chiselling into the blank and using a file to remove the excess metal to create the appropriate surround shape." ... etc.

https://theassayoffice.com/hallmarkingpunch_baoexpert

MichaelG.

Edited By Michael Gilligan on 20/03/2019 23:08:00

Thanks to 'Google Books' there is no need for me to dig-out my copy of 'Watchmaking'

The description is on p312, but the additional text on p318 is important: Daniels [ever the perfectionist] describes a process which is pretty-much certain to work ... any deviation from this carries risk ['though, of course, you may get away with it].

MichaelG.

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https://books.google.co.uk/books?id=ZWq8c0xvGxsC&pg=PA318&lpg=PA318&dq=george+daniels+watchmaking+tourbillon+bridge+copper+box&source=bl&ots=P1v5cRgFW2&sig=ACfU3U2YIMYQNbiculM5H8g2d9199CEupg&hl=en&sa=X&ved=2ahUKEwjjvOT7ypHhAhVNOBoKHRvaDqoQ6AEwC3oECAkQAQ#v=onepage&q=george%20daniels%20watchmaking%20tourbillon%20bridge%20copper%20box&f=false

Edited By Michael Gilligan on 20/03/2019 20:56:50

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Thanks, Jason ... Yes, I did spot that

As they say in the detective stories: I just wanted to "eliminate from our enquiries".

MichaelG.

To add to [or perhaps reinforce] your confusion, Paul, try this: **LINK**

https://mdmetric.com/tech/flangedim.htm

225 is conspicuous by its absence

MichaelG.