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Making A D Bit Single Flute Milling Cutter, by Clickspring The ’D’ Bit is a piece of old school shop tech that I absolutely love to use. They’re perfect for profile milling cutters, countersinks etc. as demonstrated in this video. But they are particularly well suited to drilling very deep, straight holes. They are incredibly accurate, and can leave a surface finish that approaches what you expect from a HSS reamer - And that’s from a shop made drill! The main project video that this video is related to
