Long Island Indicator Service

page 152

Crystal / Bezel diameter

How to measure the diameter of the bezel in order to figure out which size crystal you need.

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We are measuring the inside diameter of the bezel in order to determine which size crystal to buy. The diameter of this example is 38 mm using a simple steel rule. A dial or digital caliper may give you a more accurate reading of course. This is not the outside diameter of the bezel, nor is it the inside diameter. This measures the top of the ledge on which the crystal will sit once it's pressed in place with a crystal press. You will want to order a crystal that is at least one millimeter larger. In this case, you will want to order the 39 mm diameter crystal. When pressed in place, the crystal will form a dome and will stay put inside the groove on the bezel.

Not all indicators or calipers use flat crystals in this way. Be sure to read the detailed information shown on our
crystal ordering page.

GIROD-TAST
The "other" Swiss indicator still made in Switzerland.

Long Island Indicator Service
Long Island Indicator Service was founded in 1960. We provide professional repair service for precision measuring tools and gages with an emphasis on Swiss made test indicators, dial indicators, dial calipers and micrometers. We are pleased to be a recognized service partner for Brown & Sharpe.

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