How to sharpen Forstner bits
Choose your file, found for rims.
For bits with a cutting rim, chuck a round file in your drill press. At the drill's lowest speed, lightly hone the interior of the rim taking care to match the angle of the interior of the rim to the file as you turn the bit through a few quick strokes.
Add your comment
Please confirm your comment by answering the question below and clicking "Submit Comment."