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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: Boley 15mm collets
24/06/2022 20:57:45

Is this any help, vic ?

**LINK**

https://www.furniturenmarkt.de/Spannzangen-BOLEY

… aside from making you feel fortunate.

MichaelG.

Thread: Chronometer and Barometer Info Required
24/06/2022 20:35:07

This may be of interest: **LINK**

https://books.google.co.uk/books/about/An_Epitome_of_Navigation_and_Nautical_As.html?id=rvg_BRfIckEC&redir_esc=y

She also has a Wikipedia page

MichaelG.

Thread: lautard´s octopus
24/06/2022 05:32:51

Bernard,

It may be worth looking at this thread from another forum: **LINK**

https://bbs.homeshopmachinist.net/forum/general/1874266-third-machinist-bedside-reader-free-download

… there are some ‘warnings from the wise’ included there.

MichaelG.

Thread: MEW Index updated to Issue 317 (July 2022)
22/06/2022 23:52:53

Thanks, as always, David

MichaelG.

Thread: lautard´s octopus
22/06/2022 08:40:33
Posted by Journeyman on 03/02/2022 16:47:48:

I was curious as to what this might be so:-

.

Likewise … and particularly intrigued by this little ‘teaser’ …

Besides detailed drawings, machining instructions and how-to-use info, several ‘extras’ are included, like how to make a lathe sub-faceplate that thinks it’s a magnetic chuck. The "power supply" costs about $2, and it works on ferrous and non-ferrous materials alike - this info alone could be worth the whole price of the drawings!

[sorry about the font change … I just copied and pasted]

MichaelG.

Thread: Toyo ML-1 bearings
22/06/2022 08:28:21

I think you might find this previous thread useful, Neville: **LINK**

https://www.model-engineer.co.uk/forums/postings.asp?th=97908&p=1

MichaelG.

Thread: Unusual Escapement
22/06/2022 00:23:19

Try this, Sam :**LINK**

https://books.google.co.uk/books?id=bd7pbFyPCuIC&pg=RA6-PA30&lpg=RA6-PA30&dq=hartnup+bond+escapement&source=bl&ots=eeymCh9dla&sig=ACfU3U1ypyCJ2BYoogJ1oCgiKOubcUQKRA&hl=en&sa=X&ved=2ahUKEwimo5mt17_4AhWMCcAKHcIKCN0Q6AF6BAgeEAM#v=onepage&q=hartnup%20bond%20escapement&f=false

MichaelG.

21/06/2022 22:36:51

The missing teeth were, I believe, an improvement introduced after the original build

I do have some information about the modification, but cannot locate it at present. blush

MichaelG.

21/06/2022 20:16:42
Posted by duncan webster on 21/06/2022 18:44:24:

[…] Then taking a mass 1 kg on a rod 1m long […]

 

.

What makes you think that the rod of the conical pendulum is 1m long question

MichaelG.

.

870189a0-8cad-4ced-8c98-d751daf97330.jpeg

Edited By Michael Gilligan on 21/06/2022 20:23:59

Thread: Can a Washer Reduce Friction by Acting as a Bearing?
21/06/2022 13:01:15

PTFE washers are available

MichaelG.

Thread: Unusual Escapement
21/06/2022 07:02:34

Nicely put, John yes

In my opinion … The Bond was a work of genius

MichaelG.

21/06/2022 00:56:09

[ sorry]  … duplicate post

 

MichaelG.

Edited By Michael Gilligan on 21/06/2022 00:57:38

21/06/2022 00:56:08
Posted by Michael Gilligan on 26/05/2022 06:25:30:

[…]

The conical pendulum, in the dome atop, is not the timekeeper as such

… I suppose it best qualifies as something more like a flywheel.

[…]

.

It’s worth watching this :

.
MichaelG.
Thread: Blacking aluminium
19/06/2022 13:09:00

Be wary of ‘unsophisticated’ black anodising … it tends to fade to purple with prolonged exposure to light, and also on contact with soluble cutting oil. crying 2

Obviously, these characteristics will vary with the specific materials.

MichaelG.

.

5008897b-18f8-443f-8d6c-d4a29cd1fc9b.jpeg

Edited By Michael Gilligan on 19/06/2022 13:15:09

Thread: Moving v belts on pulleys ?
19/06/2022 12:59:06

Loosen the belt laugh

Seriously … if you can’t do that, you are either using the wrong size belt or a very badly designed machine.

MichaelG.

Thread: Replacing a 24V AC machine lamp
19/06/2022 08:25:44

Too late to edit, but this is the style of pin clamping/connecting used on my big LOMO microscope:

.

035fbddf-eb04-4a4c-b7d1-f593d6f1baf0.jpeg

.

MichaelG.

19/06/2022 06:40:34

Gallum

I think the underlying problem that you have is the inadequate quality of contact in that type of holder.

The lamp pins oxidise because of the heat generated by contact resistance

A much better arrangement [commonly used in microscope illuminators] is to clamp the pins down on a vee groove; but, of course, you may not have space to do this.

MichaelG.

.

P.S. __ digressing somewhat: This article may be of general interest

https://zeiss-campus.magnet.fsu.edu/articles/lightsources/tungstenhalogen.html

Edited By Michael Gilligan on 19/06/2022 06:57:11

Thread: Understanding chuck test certificates
18/06/2022 13:03:51
Posted by DiogenesII on 18/06/2022 07:12:32:

..well, the ticket clearly has spaces below the 'Body No.' serial box for the recording of 'LV' & 'SV' Jaw Set serial numbers - what else might they refer to other than the sets of external & internal jaws supplied with the chuck?

.

Not sure if that “… well” was intended for me

… but, if so, it completely misses my point.

MichaelG.

18/06/2022 07:02:07

Hopper’s explanation seems eminently logical to me yes

My only slight misgiving is that I would find it difficult to describe those areas as V-shaped

… perhaps I need help

MichaelG.

Thread: WM280v PCD
15/06/2022 08:39:50

My guess is that the nominal PCD might be 75mm

… if you share your raw measurements, everyone can have a go at working from those

MichaelG.

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