Face Mills Face Mills • M660 Series Recommended Starting Speeds (Recommended Starting Speeds [m/min] — continued) MaterialGroup WK15CM WP40PM TTI25 THM 1 – – – 355 310 295 430 360 300 – – – 2 – – – 300 260 215 310 250 215 – – – 3 – – – 275 235 190 310 250 215 – – – P 4 – – – 245 205 160 265 215 180 – – – 5 – – – 205 185 160 320 235 200 – – – 6 – – – 180 140 110 145 110 90 – – – 1 – – – 235 205 185 480 310 215 – – – M 2 – – – 210 180 150 325 205 145 – – – 3 – – – 155 140 110 320 210 145 – – – 1 505 460 410 – – – 220 185 155 145 110 90 K 2 400 355 330 – – – 180 145 125 150 120 85 3 335 300 275 – – – 145 125 100 155 115 70 1 – – – – – – – – – 1080 720 600 N 2 – – – – – – – – – 820 560 460 3 – – – – – – – – – 540 335 240 1 – – – 50 40 35 – – – – – – 2 – – – 50 40 35 – – – – – – S 3 – – – 60 50 35 – – – – – – 4 – – – 80 60 40 – – – – – – 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 ...20 0,17 0,66 1,19 0,12 0,47 0,86 0,09 0,35 0,64 0,08 0,31 0,56 0,07 0,28 0,51 ...20 …21 0,24 0,74 1,25 0,18 0,53 0,89 0,13 0,40 0,66 0,12 0,35 0,58 0,11 0,32 0,53 …21 …31 0,26 0,76 1,28 0,19 0,55 0,91 0,14 0,41 0,68 0,12 0,36 0,59 0,11 0,33 0,54 …31 NOTE: Use “Light Machining” value as starting feed rate. widia.com H57