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29tunnel
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What works best to countersink a 3-mil hole thru 3- mil carbon-fiber? any ideas?
What works best to countersink a 3-mil hole thru 3- mil carbon-fiber? any ideas?
If it's for metric flat heads it will be 90 degrees.Dave is right on the carbide. When you are buying a countersink bit, check the angles of what you are using it for. For instance if it is for countersink screws, the most common is 82 degrees.
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