I have been using a 2" (Chinese) Forstener bit at my slowest drill press speed (~600rpm?) to drill through 3/8" thick woods.
Things are OK with Teak, Walnut is easy, but Maple is something else again.
With Maple, the drill doesn't want to penetrate. It is slow going with lots of fine dust, and some smoke if I don't pause often. The wood doesn't burn though. If I press a little harder the bit bites into the wood and stalls the drill press (belt slipping - I hope). The only cure is to raise the bit and start over.
It takes WAY too long for a 3/8" hole.
I have tried sharpening the bit slightly with a diamond file, but don't see any improvement.
Is this just a case of too much speed for the hard wood, or should I be looking at better Forstner bits?