378 / Step drills & Core drills www.youtube.com/NortonAbrasivesEMEA SAFETY AND WORK RECOMMENDATIONS For the best performance and safety work; Wear safety glasses. Keep hands, hair and loose clothing away from all rotating tools. Hold the saw firmly and drill perpendicular to the work surface, apply enough pressure to let the saw cut freely, avoid excessive heat generation on the cutting surface. Always operate the saw at the right speed for the material and saw diameter. Never exceed recommended speed. NORTON BI-METAL M42 HOLE SAWS RECOMMENDED OPERATING SPEED (RPM) DIAMETER (mm) MILD STEEL (LOW CARBON STEEL) STAINLESS STEEL/ TOOL STEEL CAST IRON BRASS ALUMINUM WOOD 16 580 300 400 790 900 3000 17 500 250 330 665 750 3000 19 460 230 300 600 690 3000 20 440 220 290 580 660 3000 21 420 205 275 540 620 3000 22 390 195 260 520 585 3000 25 350 175 235 470 525 2700 27 330 160 215 435 485 2700 29 300 150 200 400 450 2700 30 285 145 190 380 425 2400 32 275 140 180 360 410 2400 33 265 130 175 340 396 2400 35 250 125 165 330 375 2400 38 230 115 150 300 345 2400 40 220 110 145 330 325 2100 41 210 105 140 280 315 2100 44 195 95 130 260 295 2100 48 180 90 120 240 270 2100 51 170 85 115 230 255 2000 54 160 80 105 210 240 2000 57 150 75 100 200 225 2000 60 140 70 90 190 220 2000 64 135 65 85 180 205 1800 65 130 65 85 175 200 1800 67 130 65 85 170 195 1800 70 125 60 80 160 185 1800 73 130 65 75 175 200 1800 76 115 55 70 150 170 1800 79 110 55 70 140 165 1500 83 105 50 65 140 155 1500 86 100 50 65 130 150 1500 89 95 45 60 130 145 1200 95 90 45 60 120 135 1200 105 80 40 55 110 120 1000 114 75 35 50 100 105 900 127 65 30 45 90 90 800 152 55 25 35 75 75 700 M42 BI-METAL HOLE SAWS HOLE SAWS
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