Chamfer Mills Chamfer Mills • M25™ Series Recommended Starting Speeds „Recommended Starting Speeds [m/min] MaterialGroup TN2510 TN7525 TN7535 WK15CM THM 1 660 580 540 410 310 280 545 475 445 – – – – – – 2 410 370 330 310 250 215 335 305 275 – – – – – – 3 370 330 305 280 215 185 305 275 245 – – – – – – P 4 275 260 230 235 170 145 230 210 190 – – – – – – 5 330 300 275 310 235 200 310 275 250 – – – – – – 6 230 205 175 205 160 130 190 160 130 – – – – – – 1 270 240 210 245 220 185 245 220 185 – – – – – – M 2 245 210 190 220 190 170 220 190 170 – – – – – – 3 190 175 150 175 155 140 175 155 140 – – – – – – 1 420 360 300 380 280 240 355 320 290 505 460 410 145 110 90 K 2 360 300 250 325 240 200 280 250 230 400 355 330 150 120 85 3 300 250 200 240 200 170 235 210 190 335 300 275 155 115 70 1 – – – – – – – – – – – – 1080 720 600 N 2 – – – – – – – – – – – – 820 560 460 3 – – – – – – – – – – – – 540 335 240 1 – – – – – – – – – – – – – – – 2 – – – – – – – – – – – – – – – S 3 – – – – – – – – – – – – – – – 4 – – – – – – – – – – – – – – – 1 145 110 70 – – – – – – – – – – – – H 2 145 110 70 – – – – – – – – – – – – 3 115 80 45 – – – – – – – – – – – – 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 Insert Insert Geometry Programmed Feed per Tooth (fz) Geometry SD09 0,10 0,15 0,30 SD09 SP12 0,10 0,15 0,35 SP12 NOTE: Use “Light Machining” value as starting feed rate. I10 widia.com