The two burrs I have are 33mm cutting depth and 21dia 64mm overall The ideal would be something around 25mm dia 75-90 mm cutting depth 130mm over all
I have a 2.2kw water cooled huanyang spindle so er20 collet so 13mm max using hywin 20 rails x is on mod 1 rack geared 3.2-1 rapid is set at 10,000 mm/min but capable of a lot more but to scared to set higher at the moment. y and z are 1610 ball screw set at 2500mm min and it is quite happy cutting at 2500mm/min. When cutting a surfboard it is basically just running up and down the length with very small y and z movements most of the time