In past issues of Wood, you've listed the correct speed range to use for router bits of various diameters. This guide gave me an idea.

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RouterBitDia

On the top edge of my router bit drawer, I drew hash marks corresponding to various bit diameters. Between these marks, I wrote the appropriate bit speed from your guide. Now, when I pick up the bit I want, I simply hold it against this guide to determine the correct router speed.
—Kevin Greene, Baskerville, Va.