D Recommended Cutting Conditions (MDE-E Type, External Coolant Supply, 2D/4D) Includes Hub drilling
Mild Steel/Low Carbon Steel SS400/S15C up to 160HB
Carbon Steel S35C/S50C up to 230HB 30 to 80m/min
Alloy Steel SCM/SCr 20 to 30HRC 30 to 80m/min 50 to 100m/min
Alloy Steel SCM/SCr 30 to 38HRC 30 to 80m/min
Work Material
Dia. <ø3 Dia. ≥ø3
30 to 80m/min 60 to 100m/min
Cutting speed
60 to 120m/min 40 to 80m/min Diameter DC Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) ø1.0 9,500 0.02 to 0.04 9,500 0.02 to 0.04 9,500 0.02 to 0.04 9,500 0.02 to 0.03 ø1.5 8,500 0.03 to 0.06 8,500 0.03 to 0.06 8,500 0.03 to 0.06 8,500 0.03 to 0.06 ø2.0 9,000 0.04 to 0.08 8,000 0.04 to 0.08 8,000 0.04 to 0.08 8,000 0.04 to 0.08 ø2.5 9,500 0.04 to 0.08 9,000 0.04 to 0.08 8,500 0.04 to 0.08 7,600 0.04 to 0.08 ø3.0 8,500 0.05 to 0.12 8,500 0.05 to 0.12 7,500 0.05 to 0.12 6,400 0.05 to 0.12 ø4.0 6,400 0.07 to 0.17 6,400 0.07 to 0.17 5,600 0.07 to 0.17 4,800 0.07 to 0.17 ø5.0 5,100 0.08 to 0.20 5,100 0.08 to 0.20 4,500 0.08 to 0.20 3,900 0.08 to 0.20 ø6.0 4,300 0.10 to 0.20 4,300 0.10 to 0.20 3,800 0.10 to 0.20 3,200 0.10 to 0.20 ø7.0 3,700 0.12 to 0.23 3,700 0.12 to 0.23 3,200 0.12 to 0.23 2,800 0.12 to 0.23 ø8.0 3,200 0.15 to 0.25 3,200 0.15 to 0.25 2,800 0.15 to 0.25 2,400 0.15 to 0.25 ø9.0 2,900 0.17 to 0.25 2,900 0.17 to 0.25 2,500 0.17 to 0.25 2,200 0.17 to 0.25 ø10.0 2,600 0.18 to 0.28 2,600 0.18 to 0.28 2,300 0.18 to 0.28 2,000 0.18 to 0.28 ø11.0 2,400 0.20 to 0.30 2,400 0.20 to 0.30 2,100 0.20 to 0.30 1,800 0.20 to 0.30 ø12.0 2,200 0.20 to 0.30 2,200 0.20 to 0.30 1,900 0.20 to 0.30 1,600 0.20 to 0.30 ø14.0 1,900 0.20 to 0.30 1,900 0.20 to 0.30 1,600 0.20 to 0.30 1,400 0.20 to 0.30 ø16.0 1,600 0.20 to 0.30 1,600 0.20 to 0.30 1,400 0.20 to 0.30 1,200 0.20 to 0.30 ø18.0 1,500 0.20 to 0.30 1,500 0.20 to 0.30 1,300 0.20 to 0.30 1,100 0.20 to 0.30 ø20.0 1,300 0.20 to 0.30 1,300 0.20 to 0.30 1,200 0.20 to 0.30 1,000 0.20 to 0.30 High-efficiency Product GS Type GS Type GS Type GS Type
Cast Iron FC250 to 280HB
Ductile Cast Iron FCD450/FCD600 to 270HB 30 to 80m/min
Stainless Steel (oil-based drilling) SUS304/SUS410 to 200HB
Special Steel/Pre-hardened Steel SKS2/SKD61 (non-tempered) 30 to 38 HRC
Work Material
Dia. <ø3 Dia. ≥ø3
30 to 80m/min 60 to 100m/min
20 to 50m/min 20 to 50m/min
30 to 60m/min
Cutting speed
50 to 100m/min 30 to 60m/min Diameter DC Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) Spindle speed (min -1 ) Feed rate (mm/rev) ø1.0 9,500 0.02 to 0.04 9,500 0.02 to 0.04 9,500 0.02 to 0.03 9,500 0.02 to 0.03 ø1.5 8,500 0.03 to 0.06 8,500 0.03 to 0.06 8,500 0.02 to 0.05 8,500 0.02 to 0.04 ø2.0 8,000 0.04 to 0.08 8,000 0.04 to 0.08 6,300 0.03 to 0.06 7,100 0.03 to 0.06 ø2.5 9,000 0.04 to 0.08 8,500 0.04 to 0.08 5,100 0.03 to 0.07 5,700 0.03 to 0.06 ø3.0 8,500 0.06 to 0.15 7,500 0.05 to 0.12 4,300 0.05 to 0.10 5,400 0.05 to 0.12 ø4.0 6,400 0.08 to 0.18 5,600 0.07 to 0.17 3,200 0.05 to 0.10 4,000 0.07 to 0.17 ø5.0 5,100 0.10 to 0.20 4,500 0.08 to 0.20 2,600 0.06 to 0.15 3,200 0.08 to 0.20 ø6.0 4,300 0.12 to 0.23 3,800 0.10 to 0.20 2,200 0.06 to 0.15 2,700 0.10 to 0.20 ø7.0 3,700 0.12 to 0.23 3,200 0.12 to 0.23 1,900 0.06 to 0.18 2,300 0.10 to 0.20 ø8.0 3,200 0.18 to 0.25 2,800 0.15 to 0.25 1,600 0.06 to 0.20 2,000 0.12 to 0.25 ø9.0 2,900 0.17 to 0.25 2,500 0.17 to 0.25 1,500 0.08 to 0.20 1,800 0.12 to 0.25 ø10.0 2,600 0.18 to 0.28 2,300 0.18 to 0.28 1,300 0.08 to 0.20 1,600 0.12 to 0.25 ø11.0 2,400 0.20 to 0.30 2,100 0.20 to 0.30 1,200 0.08 to 0.20 1,500 0.15 to 0.30 ø12.0 2,200 0.20 to 0.30 1,900 0.20 to 0.30 1,100 0.10 to 0.25 1,400 0.15 to 0.30 ø14.0 1,900 0.20 to 0.30 1,600 0.20 to 0.30 1,000 0.10 to 0.25 1,200 0.15 to 0.30 ø16.0 1,600 0.20 to 0.30 1,400 0.20 to 0.30 800 0.10 to 0.25 1,000 0.15 to 0.30 ø18.0 1,500 0.20 to 0.30 1,300 0.20 to 0.30 800 0.10 to 0.25 900 0.15 to 0.30 ø20.0 1,300 0.20 to 0.30 1,200 0.20 to 0.30 700 0.10 to 0.25 800 0.15 to 0.30 High-efficiency Product GS Type GS Type GS Type GS Type 1. The recommended cutting conditions below are for cases where a water soluble coolant is used (excluding drilling of stainless steel). 2. Supply sufficient water soluble coolant to the cutting edge. 3. If using non-water-soluble coolant, reduce the cutting speed by 20-30% and ensure that sufficient coolant is supplied. 4. When mounting the drill in the collet, make sure that runout around the cutting edge is no greater than 0.02mm. 5. Make sure the flute does not enter the collet. 6. If the surface of the workpiece is abnormally shaped (tilted, interrupted etc.), reduce the feed rate to about half when feeding the drill in the workpiece.
* If stable drilling is still not possible, pre-machining of the flat surface with the MDF Flat MULTIDRILL is recommended. 7. When performing interrupted through drilling, reduce the feed rate to about half the feed rate used prior to this process.
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