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How sharp is the cutting edge on a diamond-coated tool?

April 26, 2017cutting diamond-coated Sharp Tool

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How sharp is the cutting edge on a diamond-coated tool?

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The coating will naturally tend to round the edge somewhat. Sharpness is a function of the sharpness of the uncoated tool and the thickness of the film. Thin (10 micron) films over a dead sharp edge are still quite sharp. Thicker films, e.g., 40 microns, will approach an A hone in sharpness.