I am having trouble copying the link but there is a chart from Wood Magazine called Drill press speed chart. It is all over the web and one that came up "Meridith Corp pdf" is printable. It lists materials across the top and the correct speed for all sizes and types (twist, spade, Forstner, spur, etc.) down the side. They sent me a couple of copies a while back, with a subscription solicitation. I have it framed behind my drill press. There was another offer to download but you need a password, which probably requires a subscription.
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