Laydown Threading Recommended Cutting Speeds • Metric Cutting Speed — vc m/min TN6025 Material Group min Start max 0/1 130 140 150 2 110 145 175 3 110 145 175 P 4 75 95 115 5 100 125 145 6 40 55 65 1 60 75 90 M 2 40 50 55 3 40 50 60 1 60 80 90 K 2 60 75 85 3 60 75 90 1 600 750 900 2 535 685 835 3 230 300 370 N 4 135 180 225 5 70 90 110 6 445 565 690 7 550 700 850 1 25 35 40 2 15 20 20 S 3 40 60 70 4 20 30 35 widia.com F45