Brown and Sharp type gear cutters each cover a limited range of teeth numbers. E.g. a number 6 cutter covers 17-20 teeth gears, and a number 5 cutter covers 21-25 teeth. As I understand it, the cutters are exact for the lowest number of teeth, becoming less and less accurate for higher numbers in the range.
So is it better (more accurate) to use, say, a number 6 cutter to cut a 20 tooth gear (3 steps away from the most accurate) or a number 5 cutter (1 step away from the most accurate). Logic tells me that the number 5 cutter is the better choice, but I wonder if I'm missing something.
Mike