Basic formulas
Materials for cutting tools. Numerical data in milling

The following tables are proposed for coated 8% cobalt high-speed steel milling cutters, coated solid carbide (HK10 micrograin) milling cutters and insert milling cutters. As indicated in the introduction, the numerical values in these tables are based on chip thicknesses, not tooth feeds. To determine the tooth feed, the formulas and/or curve to be used are shown in figure 1 . Finally, when the tool type allows it, the proposed cutting parameters are indicated according to the L/D ratio, i.e. effective length of tool output/tool diameter.