220409 220360 1509 1×D 3×D 5×D 8×D 12×D KFv 1.2 0.9 0.8 0.7 0.6 Recommended cutting data for solid carbide twist drill, with interior cooling supply The indicated cutting data in our guideline table are valid for use in shrinking or hydraulic expansion chuck. The indicated standard values for the cutting speed Vc depends on drilling depth related to the diameter to multiply by the correction factor KFv. Material group Material Strength Cutting speed Recommended feed rate (mm per rev.) based on Hardness Vc (m/min) diameter range 3-5 5-8 8-12 12-16 16-20 3.1 – 3.2 – X12CrNis18/8 4.1 – 4.2 – 25 - 55 0.04 - 0.10 0.05 - 0.15 0.05 - 0.18 0.08 - 0.20 0.10 - 0.20 4.3 X10CrNiNb18/9 6.2 – 6.2 15 - 45 0.02 - 0.07 0.04 - 0.10 0.06 - 0.12 0.08 - 0.15 0.08 - 0.15 7.1 – 7.2 – GG 20, < 200 HB 7.3 GGG40 80 - 130 0.10 - 0.25 0.15 - 0.30 0.20 - 0.40 0.25 - 0.45 0.30 - 0.50 GTS 45 GG 30 < 250 HB 7.4 GGG 50 70 - 115 0.10 - 0.20 0.12 - 0.25 0.15 - 0.35 0.20 - 0.40 0.25 - 0.45 GTW 40 GG 40 > 250 HB 7.5 – 7.6 GGG 70 60 - 100 0.10 - 0.20 0.12 - 0.25 0.15 - 0.35 0.20 - 0.40 0.25 - 0.45 GTS 70 9.3 < 10% Si 100 - 400 0.10 - 0.25 0.15 - 0.35 0.25 - 0.45 0.30 - 0.50 0.35 - 0.55 9.4 – 9.5 > 10% Si 90 - 300 0.10 - 0.25 0.15 - 0.35 0.25 - 0.45 0.30 - 0.50 0.35 - 0.55 10.2 Copper 10.2.1 Brass 70 - 300 0.07 - 0.18 0.12 - 0.25 0.20 - 0.35 0.25 - 0.45 0.30 - 0.50 Bronze Inconel 15 - 35 0.02 - 0.07 0.04 - 0.10 0.06 - 0.12 0.08 - 0.15 0.08 - 0.18 Recommended cutting data for solid carbide twist drill Typ W, without interior cooling supply Materialgroup Material Strength 0.50 - 0.75 0.80 - 0.95 1.00 - 1.15 1.20 - 1.45 1.50 - 1.95 2.00 - 2.50 9.1 Aluminium n = 20,000 n = 20,000 n = 20,000 n = 18,000 n = 15,000 n = 12,000 9.2 < 350 N/mm2 f = 0.05 f = 0.06 f = 0.08 f = 0.10 f = 0.11 f = 0.12 Aluminium alloys step = 0.5 > 5×D step = 0.8 > 5×D step = 1.0 > 5×D step = 1.2 > 5×D step = 1.5 > 5×D step = 2.0 > 5×D 10.1 Copper n = 20,000 n = 20,000 n = 20,000 n = 18,000 n = 15,000 n = 12,000 10.3 < 350 N/mm2 f = 0.05 f = 0.06 f = 0.08 f = 0.10 f = 0.11 f = 0.12 Copper alloys step = 0.5 > 5×D step = 0.8 > 5×D step = 1.0 > 5×D step = 1.2 > 5×D step = 1.5 > 5×D step = 2.0 > 5×D 11.1 Plastics n = 20,000 n = 20,000 n = 20,000 n = 18,000 n = 15,000 n = 12,000 Thermosets – f = 0.05 f = 0.06 f = 0.08 f = 0.10 f = 0.11 f = 0.12 Thermoplastics step = 1.0 > 5×D step = 1.0 > 5×D step = 1.5 > 5×D step = 1.8 > 5×D step = 2.0 > 5×D step = 3.0 > 5×D 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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