218. Speed regulationA specific cutting speed is required when milling different materials (e.g. steel, aluminium etc.)The r.p.m. of the work spindle can be infinitely varied from 140-3000 min-1 or 100–7500 min-1 on thepotentiometer respectively, so that the appropriate speed for the material, the workpiece and thediameter of the cutter can be chosen every time.Please see the table showing the respective r.p.m. values for aluminium and steel as follows:8.1 Speed regulation for machining aluminium and steelALUMINIUM STEELtool-Ø r.p.m. -1 tool-Ø r.p.m. -12 mm 3000 2 mm 20004 mm 2900 4 mm 14006 mm 2850 6 mm 12008 mm 2750 8 mm 85010 mm 2700 10 mm 70012 mm 2650 12 mm 59014 mm 2600 14 mm 5008.2 Speed regulation for 1.4 kW motor% r.p.m. -11 1405 14010 15015 16020 20025 30030 40035 70040 85045 100050 120055 150060 190065 250070 280080 300090 3000100 3000
