CARBIDE
General Drilling Operations Work Material
Hardened Steels, Prehardened Steels
Titanium Alloys (Annealed)
Inconel, Titanium Alloys (Solution Treated and Aged)
Hardness
30-38 HRC
38-45 HRC
Drilling Speed
120-140 SFM
50-70 SFM
210-230 SFM
160-180 SFM
Drill Dia.
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
Speed RPM
Feed IPR
mm Inch 1 -
12,600 0.0003 - 0.0005 5,800 0.0002 - 0.0004 20,850 0.0002 - 0.0004 16,500 0.0002 - 0.0004 1/16 8,000 0.0004 - 0.0006 3,700 0.0003 - 0.0005 13,150 0.0004 - 0.0006 10,400 0.0004 - 0.0006 2 - 6,300 0.0006 - 0.0008 2,900 0.0004 - 0.0006 10,400 0.0005 - 0.0007 8,250 0.0005 - 0.0007 - 3/32 5,300 0.0007 - 0.0009 2,400 0.0005 - 0.0007 8,750 0.0007 - 0.0009 6,950 0.0007 - 0.0009 3 - 4,200 0.0010 - 0.0012 1,900 0.0008 - 0.0010 6,950 0.0011 - 0.0013 5,500 0.0011 - 0.0013 - 1/8 4,000 0.0011 - 0.0012 1,850 0.0008 - 0.0010 6,600 0.0012 - 0.0014 5,200 0.0012 - 0.0014 4 - 3,150 0.0011 - 0.0013 1,450 0.0009 - 0.0010 5,200 0.0013 - 0.0015 4,100 0.0013 - 0.0015 - 3/16 2,650 0.0013 - 0.0015 1,200 0.0010 - 0.0012 4,400 0.0015 - 0.0017 3,450 0.0015 - 0.0017 6 - 2,100 0.0015 - 0.0017 950 0.0013 - 0.0015 3,500 0.0023 - 0.0025 2,750 0.0023 - 0.0025 - 1/4 2,000 0.0016 - 0.0018 900 0.0014 - 0.0015 3,300 0.0024 - 0.0026 2,600 0.0024 - 0.0026 8 - 1,550 0.0018 - 0.0020 730 0.0015 - 0.0017 2,600 0.0028 - 0.0030 2,050 0.0028 - 0.0030 - 3/8 1,300 0.0023 - 0.0025 600 0.0018 - 0.0020 2,200 0.0039 - 0.0041 1,700 0.0039 - 0.0041 10 - 1,250 0.0024 - 0.0026 580 0.0019 - 0.0021 2,130 0.0040 - 0.0042 1,650 0.0040 - 0.0042 - 7/16 1,140 0.0025 - 0.0026 520 0.0019 - 0.0021 1,920 0.0041 - 0.0043 1,450 0.0041 - 0.0043 12 - 1,050 0.0025 - 0.0027 490 0.0020 - 0.0022 1,780 0.0041 - 0.0043 1,350 0.0041 - 0.0043 - 1/2 990 0.0026 - 0.0027 460 0.0020 - 0.0022 1,680 0.0042 - 0.0043 1,300 0.0042 - 0.0043 *When using our List 233 three flute drills, we recommend the same RPM but feed rates should be increased by 25-35%. -
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Drilling Technical
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