Engraving Bit Isolation Milling - Bantam Tools
The engraving bit will be much faster than a 1/64" flat end mill, and has a smaller cutting diameter so it can cut smaller features. If the board requires sub-10-mil trace-and-space, an engraving bit is required. If the board requires 6 mil trace and space, then a 0.003" PCB engraving bit (30°) is required.
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