Hello George

I usually don’t have much to say on the group, but on this occasion, I may be able to help.

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Like you I also repair gauges. Normally I buy replacement crystals from G-S Supplies in NY . No commercial connection just a happy overseas customer for more than 20 years. They are great to deal with. The website has a lot of data about crystal sizes and types. Prices are reasonable.

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That said, I have made a few crystals because G-S does not carry/make many of the bigger sizes unless you want to order 500. Biggest problem I have with that here in Australia is finding acrylic sheet thin enough. But I’m sure there is a supply in the US.

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Turning is the only method I have tried but a punch would probably do just fine and if necessary you can turn a bevel afterwards.

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As to the bevel edge I can’t speak for every make and type of gauge, but many regular size gauges made by Mitutoyo, Starrett, Federal, Standard, etc. use bevel edge crystals. However, that only applies to domed crystals (by the way they start out flat and you deform them to fit the bezel). But (there is always a but) some gauges including ones made by the above makers have flat crystals and no bevel.

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Hope that helps.

Cheers

John Bates

Sydney, Australia

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