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R&R was the manufacture of the Rayco product. They had a falling out and R&R went into competition with Rayco. A few years back, Renishaw bought R&R.

Take a look at Inspection Arsenal, too.
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I prefer Rayco because they use mostly steel components, and their products seem more rigid. R&R (Renishaw) uses cheaper materials and their fixturing doesn't seem to hold the workpiece as firmly. Just my opinion.


Another option, although not CMM specific, is Fixtureworks https://www.fixtureworks.com/store/pc/home#column1


Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota


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Andrew, what is the smallest tolerance on the print for the workpiece you mentioned? What surfaces do you need to measure? If you're mostly measuring the diameters of the male and female connectors, fixturing could be simple. If you need to measure multiple surfaces in relation to one another, you may need more probing clearance, which may require customized fixturing.

However, if you would like a quick but expensive solution to the parts you referenced, you could purchase a "Skinny Vise" from Inspection Arsenal. They come in both inch and metric versions:

https://inspectionarsenal.com/inspectio ... load-inch/

4532_243fc8cb70da1f33cf41b04c9071fad1.jpg

Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota

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What's really nice are the 4 Steele dowels in the upper left corner that grab
onto 4 corresponding magnets in a corner nest on the O-inspect. stage.
So the operator just loads the part, clicks on the autorun icon and of it goes.
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Here's another option. I'm usually not much for fancy, new-fangled technology, but I heard this thing is like ultra-accurate.


. 4532_ebe8b10fbfc024c94b526697019b9d7c.png

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Heck, you might as well just eye-ball the measurement. 😜

Sorry... I'm feeling a bit snarky today. Have pity on the poor machinists that will have to deal with me.


Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota

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I had a brief stint as a calibration technician for a small local company here.
We had a customer that required their tape measure be "calibrated".
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Hey look... that's a very generic military-spec connector. Good news for fixturing. This particular print is in the public domain. You should be able to run a pallet of them, as many as you can fit in the measuring volume. I'd constrain the rotation of the part using one of the flats on the collar.


. 4532_7f601e698e637cd4b2010b6044015271.jpg


Jeff Frodermann
Meier Tool & Engineering
Anoka, Minnesota
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I would just lay a 3 jaw chuck fixture down flat. That way it is always self centering, even if you have different connector diameters.
3090_bd55dd3082b02b9b1245666014f45412.jpg
Like this but flat on the granite. Just lightly clamp on the thread on the backside.
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