What is this item

[NobbyParticipant @nobby]

Edited By Nobby on 01/03/2018 15:09:18

Edited By Nobby on 01/03/2018 15:10:35

[NobbyParticipant @nobby]

some kind of gauge

[ASFParticipant @asf]

Its one of these

**LINK**

[NobbyParticipant @nobby]

Thank you ASF came with a job lot of tools I bought on line

[Neil WyattModerator @neilwyatt]

I assume you put a full diameter piece in the zero position to set it, and the figures tell you how much smaller a stretched piece is.

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 01/03/2018 15:54:22:

I assume you put a full diameter piece in the zero position to set it, and the figures tell you how much smaller a stretched piece is.

.

The intriguing bit being that the scale is calibrated as 'Reduction in Area'

Presumably 0 to 96% reduction.

That's neat !!

MichaelG.

[NobbyParticipant @nobby]

Its still a puzzle for me . Its well made

[Michael GilliganParticipant @michaelgilligan61133]

**LINK**

http://www.instron.us/en-us/our-company/library/glossary/r/reduction-of-area

.

The one illustrated on this page has a patent number:

 http://www.mathsinstruments.me.uk/page60.html

… but it's illegible ​

MichaelG.

Edited By Michael Gilligan on 01/03/2018 17:48:41

[NobbyParticipant @nobby]

Hi Michael
Thank you for link It makes sense to me Stress over Strain = E etc
Nobby

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