1574 354 DRILL-LINE CONTACT INFORMATION For more information please call +44 1530 261 145 or send an email to sales@atagarryson.com SPADE DRILLS The cutting parameter is connected with the length of holder. For longer holder, when choosing the cutting data, you should times the ratio in the following table: Parameter Holder length 3×D 4×D 5×D 8×D 10×D 12×D 15×D Speed (Vc) see above chart 0.9 0.85 0.80 0.75 Feed (fz) see above chart 0.95 0.90 0.90 Example: 12×D holder fz: 0.15 × 0.90 (acc. multiplicator) = 0.14 mm/rev Material: free mach. steel (370 N/mm²) Vc: 79 × 0.80 (acc. multiplicator) = 63.2 m/min d: 9.5 mm d: cutting circle diameter n: rpm n = rpm Vc * 318.31 / d (1/min) Vf = feed rate fz * n (mm/min) Cutting parameter for 20 1430 / 20 1465 Material Cutting speed Vc m/min Feed / fz mm/rev Steel 500 N 20-27 0.1-0.15 Steel 750 N 17-24 0.1-0.15 Steel 900 N 15-22 0.09-0.15 Steel 1200 N 13-20 0.09-0.15 Steel 1400 N 13-20 0.09-0.15 Stainless steel 11-15 0.1-0.15 Alu 42-62 0.15-0.25 Grey and cast iron 22-42 0.15-0.25 Copper 32-52 0.15-0.2 Brass 32-52 0.15-0.2 Rail tracks 13-17 0.09-0.12 Hardox 400 6 0.12 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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