Version 1.1.4 dated 2015-3-30Page 44 Original operating instructionsBF46 Vario | BF46TCUS4.20.1 Standard values for cutting speeds[FPM] with high-speed steel and hard metal in conventional millingGiven below are standard values for speeds depending on the milling cutter diameter, cuttertype and material.Tool Steel Grey Cast Iron Age- HardenedAl alloyPeripherial and side milling (FPM) 33 - 82 33 - 72 492 - 1,148Relieved form cutters (FPM) 49 - 79 33 - 66 492 - 820Inserted tooth cutter with SS (FPM) 49 - 79 39 - 82 656 - 984Inserted tooth cutter with HM (FPM) 328 - 656 98 - 328 984 - 1,312Tool diameter (in.)Peripheral and side milling cutters Steel Grey Cast Iron Age-HardenedAl alloy33 - 82 FPM 33 - 72 FPM 492 - 1,148 FPMSpeed (RPM)1.378" 91 - 227 91 - 200 1,365 - 3,1851.575" 80 - 199 80 - 175 1,195 - 2,7901.772" 71 - 177 71 - 156 1,062 - 2,4701.969" 64 - 159 64 - 140 955 - 2,2302.165" 58 - 145 58 - 127 870 - 2,0272.362" 53 - 133 53 - 117 795 - 1,8602.559" 49 - 122 49 - 108 735 - 1,715Tool diameter (in.)Form cutters Steel Grey Cast Iron Age-HardenedAl alloy49 - 79 FPM 33 - 66 FPM 492 - 820 FPMSpeed (RPM)0.1575" 1,194 - 1,911 796 - 1,592 11,900 - 19,0000.1969" 955 - 1,529 637 - 1,274 9,550 - 15,9000.2362" 796 - 1,274 531 - 1,062 7,900 - 13,2000.3150" 597 - 955 398 - 796 5,900 - 9,9000.3937" 478 - 764 318 - 637 4,700 - 7,9000.4724" 398 - 637 265 - 531 3,900 - 6,6000.5512" 341 - 546 227 - 455 3,400 - 5,6000.6299" 299 - 478 199 - 398 2,900 - 4,900