Grind outside diameter of watch jewels to size.
What does a Jewel Grinder II do?
Grinds outside diameter of watch jewels to size, using diamond-bonded wheel under water jet: Fits wire filled with jewels in small holding tool and turns adjusting screw to pull wire taut. Positions rubber holding wheel so distance between grinding wheels is identical to specified outside diameter of jewels. Holds jewels against grinder, moving holder back and forth until jewels are ground sufficiently to pass between wheels. Measures jewel diameter with precision jaw gauge and regrinds if necessary.