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Re: MP measurements

Author: kdk ★2017
Date: 2018-05-20 00:10

Ken, I use the glass that came with the Brand kit. Centering it against the table, lining up the mouthpiece tip and the end of the glass, then sliding the taper gauge gently into the opening between the glass and the mouthpiece. The same way, I think, I saw Matsen do it when I sat and watched him years ago reface some of my mouthpieces.

I also have a dial gauge that came with the Brand kit. It has a guide against which to rest the tip so that the feeler on the gauge measures the same place consistently when the mouthpiece is held flat against the glass it's installed through. I don't use this one so much because there's no restraint to hold the mouthpiece in place - you have to hold it still against the glass with your thumb(s) and I find that the mouthpiece slides around a good deal. I'm also not certain that the metal probe that touches the mouthpiece doesn't have the potential to damage the rail.

> I am curious how you are getting three different
> measurements from three different gauges.

Well, I'm assuming my gauges are not accurately tapered. Of course there's only one correct measurement for a given mouthpiece. But the number assigned to it by an inaccurately made gauge may not match another gauge's measurement regardless of which gauge is the accurate one (assuming that either is accurate). I assume that Bob Bernardo or Clark Fobes or Walter Grabner have a way to measure the tip openings of their mouthpieces accurately. Hence, my question - what *is* a gauge of known quality of manufacture and accuracy?

Karl

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