WGC Grooving and Cut-Off • WGC Recommended Starting Speeds • Metric MaterialGroup WU25PT 0–1 110 225 270 2 110 160 260 3 110 125 235 P 4 60 90 160 5 100 160 210 6 85 120 185 1 90 170 245 M 2 90 150 245 3 90 140 210 1 100 145 225 K 2 70 120 170 3 50 85 120 1–2 120 440 780 3 — — — N 4 100 290 490 5 70 135 195 6 100 170 245 1 8 40 60 2 8 30 75 S 3 15 40 75 4 8 50 110 NOTE: F IRST choice starting speeds are in bold type. As the average chip thickness increases, the speed should be decreased. widia.com 160 widia.com