What speed for what bit that is more than 1" dia.? No speed chart in your manual or on the router ? Easy...tip speed in the range of 104 to 107 mph will be pretty close to the correct speed.ie: 2" bit = 3.1416 x 2 x guessed RPM divided by 12 x 60 divided by 5280. If the answer is greater than 107 mph...lower the est.speed & recalculate.
Lee |