Precision division plates

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Andrew Johnston on 10/03/2019 10:39:22:

Posted by Michael Gilligan on 10/03/2019 10:32:54:

RJ Newbould made some very interesting contributions to the Pactical Machinist forum

Indeed; it happens to us all eventually, but still a great shame. His posts were always a pleasure to read, informative, helpful and polite.

Andrew

.

Just for info.

Trying to follow-up on the RJ Newbould references

[see also: **LINK**

https://www.model-engineer.co.uk/forums/postings.asp?th=109149&p=2

I drew a blank on the Smithsonian pages. …

So, I wrote to them asking about the 'Basic Mechanisms' collection. and received to following reply from Jennifer Gloede, Outreach & Collections Specialist, National Numismatic Collection

[quote]

Thank you for your email. Many objects in the engineering collection can be found here:

http://americanhistory.si.edu/collections/subjects/engineering-building-and-architecture

The Newbould devices are not yet online but should be available later this year when more of the museum's collection is published online.

[/quote]

MichaelG.

Edited By Michael Gilligan on 18/03/2019 15:30:30

[Anonymous]

Posted by AdrianR on 18/03/2019 15:09:44:

It uses a Hirth coupling. It was cut not using any bevel so only the outer edge makes contact.

In #54 Scribe a line there is further discussion about setting the correct angle to cut teeth that mesh properly.

Err, in which case it wasn't a Hirth coupling but simply a radial spline. By definition a Hirth coupling uses tapered teeth that mate over the full length. The scribe a Line in #54 describes the mathematics to make a Hirth coupling.

Andrew

[Michael GilliganParticipant @michaelgilligan61133]

Re-reading 'Scribe a Line' in MEW #54, I noticed mention of Voith

… Their portfolio is impressive: **LINK**

http://voith.com/corp-en/hirth-couplings/hirth-rings.html

MichaelG.

[Author]

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