Dec 29, 2018 · 60 degree: 100ipm, 30 plunge, 3 on Dewalt dial. 90 degree: 100ipm, 30 plunge, 3 on Dewalt dial. 1 1/2 Spoil board bit: 150ipm, 5 plunge, 1mm depth per pass, 1 on Dewalt dial. On the left, a chart designed by Carbide 3D with recommended settings on different materials. Here is another excel chart with reference feeds and speeds.