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Member postings for Michael Gilligan

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

Thread: Its nearly there !
25/03/2019 18:27:44
Posted by SillyOldDuffer on 25/03/2019 09:44:30:
 
Can anyone more knowledgeable comment?

.

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.

.

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

Thread: What new lathe?
25/03/2019 12:12:53

< drool >

MichaelG.

Thread: WHERE ARE THE SHAPER USERS ?
25/03/2019 06:48:15
Posted by IanT on 24/03/2019 23:06:34:

Clive,

The Base Circle article was published in 1950 - so

.

**LINK**

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

MichaelG.

24/03/2019 17:57:05

That's an excellent article, Ian

Thanks for the reference.

MichaelG.

Thread: ML7-R tumbler gears
24/03/2019 13:49:37

Thanks for the 'closure' Mark yes

MichaelG.

Thread: On/off at the top with red green lights. What edge finder I?
23/03/2019 13:40:00
Posted by Tony Pratt 1 on 23/03/2019 12:32:59:

Haven't got a clue now I can see it.

.

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

Thread: M type lathe tumbler reverse
23/03/2019 13:26:56

That's looking good, David yes

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

MichaelG.

Thread: Soba rotary table
23/03/2019 08:11:29

Thanks, Jason ... That would be logical.

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

MichaelG.

.

[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

Thread: Why do we do it?
22/03/2019 23:27:20
Posted by blowlamp on 22/03/2019 23:21:38:

Remember to set your onions 2 to 4 inches apart, in rows 10 to 12 inches apart.

.

dont know Interesting advice

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

MichaelG.

Thread: Soba rotary table
22/03/2019 21:49:00
Posted by Emgee on 22/03/2019 21:14:44:

... with the set-up shown you could mount the chuck direct to Tee nuts in the table slots, no need for the spacer plate with 4 front fixings through the chuck.

.

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.

Thread: Unusual knurling tool
22/03/2019 20:18:37
Posted by Plasma on 22/03/2019 16:57:44:

Michael many thanks for the link. There it is still in production.

I'm a bit confused, not being of a horological persuasion, as to why such a tool is manufactured by a precision clock and watch tool maker.

Its capacity is 3 to 25mm which seems quite big for a watch maker. The spare Knurls also look quite coarse.

Is this just for horology or a general tool? Seems everything else on their site is just for watch making.

Regards mMic

.

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

img_2836.jpg

 

img_2837.jpg

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

22/03/2019 14:54:32

I like that yes

Maybe designed by someone who owned a Pipe-Cutter ?

MichaelG.

.

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

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

Thread: Heat hardening?
21/03/2019 23:15:55
Posted by Steve Crow on 21/03/2019 17:12:26:

Can I just add that I'm not making a tourbillon bridge!

.

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

MichaelG.

Thread: Watchmaker's vertical slide
21/03/2019 23:10:29

That looks very tidy, Rod

MichaelG.

Thread: Milling curves
21/03/2019 10:19:13
Posted by Brian G on 21/03/2019 08:15:35:

EDIT: If you do go down the motorised table route, take a look at Arduino Rotary Table for Dummies on HMEM. The whole project costs less (much less if you use an Arduino clone) than a set of division disks for a rotary table, and assembling the electronics was a fun introduction to Arduinos.

.

Thanks for posting that excellent link, Brian yes

... It's sure to be useful sometime

MichaelG.

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

Thread: Silver soldering a blind 'mortise and tenon' joint.
20/03/2019 23:27:57

Thanks for the report, Robin yes

MichaelG.

.

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.

Thread: How Are Letter / Hallmark Punches Made?
20/03/2019 23:06:58

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

Thread: Heat hardening?
20/03/2019 20:56:27

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.

.

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

Thread: Conundrum for the collective!
20/03/2019 16:31:10
Posted by JasonB on 20/03/2019 15:07:03:

That last link is for pipe flanges, I doubt they would use the same for power and they don't have a smaller spigot or recess for same..

.

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

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

MichaelG.

20/03/2019 15:01:28

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.

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