Helical Mills Helical Millls • M390 Series Recommended Starting Speeds Recommended Starting Speeds [m/min] MaterialGroup TN6520 TN6525 TN6540 TN7525 0 – – – 340 265 235 300 235 200 340 260 235 1 – – – 340 265 235 300 235 200 340 260 235 2 – – – 265 210 180 210 160 140 260 210 180 P 3 – – – 235 180 155 180 140 115 235 180 155 4 – – – 195 140 120 150 110 90 195 140 120 5 – – – 260 195 165 200 150 125 260 195 165 6 – – – 170 135 110 135 100 85 170 135 110 1 – – – 160 100 65 110 65 50 205 185 155 M 2 – – – 100 65 40 65 40 35 185 160 140 3 – – – 105 65 45 70 40 35 145 130 115 1 375 265 190 230 205 185 185 170 150 315 235 200 K 2 325 210 160 180 160 150 145 130 115 270 200 165 3 250 190 135 150 135 120 130 120 105 200 165 140 1 – – – – – – – – – – – – N 2 – – – – – – – – – – – – 3 – – – – – – – – – – – – 1 – – – – – – 40 30 25 – – – 2 – – – – – – 20 15 10 – – – S 3 – – – – – – 60 35 25 – – – 4 – – – – – – 50 25 20 – – – 1 – – – – – – – – – – – – H 2 – – – – – – – – – – – – 3 – – – – – – – – – – – – (continued) K8 widia.com