Slotting Mills Slotting Mills • M900™ Series Recommended Starting Speeds Recommended Starting Speeds [m/min] MaterialGroup WK15CM WP25PM WU35PM WP35CM WP40PM 0 – – – 330 285 270 260 230 215 455 395 370 295 260 245 1 – – – 330 285 270 260 230 215 455 395 370 295 260 245 2 – – – 275 240 200 220 190 160 280 255 230 250 215 180 P 3 – – – 255 215 175 200 170 140 255 230 205 230 195 160 4 – – – 225 185 150 180 150 120 190 175 160 205 170 135 5 – – – 185 170 150 150 135 120 260 230 210 170 155 135 6 – – – 165 125 100 130 100 80 160 135 110 150 115 90 1 – – – 205 180 165 170 150 135 205 185 155 195 170 155 M 2 – – – 185 160 130 155 130 110 185 160 140 175 150 125 3 – – – 140 120 95 115 100 80 145 130 115 130 115 90 1 420 385 340 230 205 185 – – – 295 265 240 – – – K 2 335 295 275 180 160 150 – – – 235 210 190 – – – 3 280 250 230 150 135 120 – – – 195 175 160 – – – 1 – – – – – – – – – – – – – – – N 2 – – – – – – – – – – – – – – – 3 – – – – – – – – – – – – – – – 1 – – – 40 35 25 35 30 25 – – – 40 35 30 2 – – – 40 35 25 35 30 25 – – – 40 35 30 S 3 – – – 50 40 25 45 35 25 – – – 50 40 30 4 – – – 70 50 35 60 45 30 66 50 33 65 50 35 1 – – – – – – – – – – – – – – – H 2 – – – – – – – – – – – – – – – 3 – – – – – – – – – – – – – – – NOTE: FIRST choice starting speeds are in bold type. As the average chip thickness increases, the speed should be decreased. Recommended Starting Feeds Recommended Starting Feeds [mm] Light General Heavy Machining Purpose Machining Programmed Feed per Tooth (fz) as a % of Radial Depth of Cut (ae) Insert Insert Geometry 5% 10% 20% 30% 40–100% Geometry MDHW 0,12 0,23 0,46 0,08 0,17 0,33 0,06 0,13 0,25 0,06 0,11 0,22 0,05 0,10 0,20 MDHW NOTE: Use “Light Machining” value as starting feed rate. L30 widia.com