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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**


. 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 >


25/03/2019 06:48:15
Posted by IanT on 24/03/2019 23:06:34:


The Base Circle article was published in 1950 - so




24/03/2019 17:57:05

That's an excellent article, Ian

Thanks for the reference.


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

Thanks for the 'closure' Mark yes


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.


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.


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



[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.


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


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




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.


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 ?




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.


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

That looks very tidy, Rod


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


[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



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.


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].




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".


20/03/2019 15:01:28

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

225 is conspicuous by its absence


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