RECOMMENDED CUTTING CONDITIONS y MWS SB/LB/XB/DB Type (L/D<10) Mild Steel ( < 180HB) Carbon Steel, Alloy Steel (180 ─ 280HB) Work Material AISI 1010 etc. AISI 1045, 4140 etc. Drill Dia. DC Cutting Speed vc Feed fr Cutting Speed vc Feed fr (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) inch mm (SFM) (IPR) (SFM) (IPR) .0197 0.50 130 (100─150) .0004 (.0002 ─ .0006) 130 (100─150) .0004 (.0002 ─ .0006) .0248 0.63 130 (100─150) .0006 (.0003 ─ .0008) 130 (100─150) .0006 (.0003 ─ .0008) .0315 0.80 150 (115─165) .0011 (.0006 ─ .0016) 150 (115─165) .0011 (.0006 ─ .0016) .0394 1.00 165 (130─180) .0014 (.0008 ─ .0020) 165 (130─180) .0014 (.0008 ─ .0020) .0472 1.20 165 (130─180) .0018 (.0012 ─ .0024) 165 (130─180) .0018 (.0012 ─ .0024) .0630 1.60 165 (130─180) .0022 (.0014 ─ .0031) 165 (130─180) .0022 (.0014 ─ .0031) .0787 2.00 165 (130─180) .0028 (.0016 ─ .0039) 165 (130─180) .0028 (.0016 ─ .0039) .0984 2.50 195 (150─230) .0033 (.0020 ─ .0049) 195 (150─215) .0033 (.0020 ─ .0049) Carbon Steel, Alloy Steel (280 ─ 350HB) Austenitic Stainless Steel ( < 200HB) Work Material AISI 4340 etc. AISI 304, 316 etc. Drill Dia. DC Cutting Speed vc Feed fr Cutting Speed vc Feed fr (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) inch mm (SFM) (IPR) (SFM) (IPR) .0197 0.50 100 (65─115) .0004 (.0002 ─ .0006) 65 (50─80) .0003 (.0002 ─ .0004) .0248 0.63 100 (65─115) .0006 (.0003 ─ .0008) 65 (50─80) .0004 (.0003 ─ .0005) .0315 0.80 115 (80─130) .0011 (.0006 ─ .0016) 80 (65─100) .0008 (.0006 ─ .0010) .0394 1.00 130 (100─150) .0014 (.0008 ─ .0020) 100 (65─115) .0012 (.0008 ─ .0017) .0472 1.20 130 (100─150) .0018 (.0012 ─ .0024) 100 (65─115) .0016 (.0012 ─ .0021) .0630 1.60 130 (100─150) .0022 (.0014 ─ .0031) 100 (65─115) .0020 (.0014 ─ .0028) .0787 2.00 130 (100─150) .0028 (.0016 ─ .0039) 100 (65─115) .0024 (.0016 ─ .0031) .0984 2.50 165 (130─180) .0033 (.0020 ─ .0049) 130 (100─150) .0030 (.0020 ─ .0039) Note 1) For the spindle revolution of diameters not shown in the table, please adjust to the conditions of larger and closest diameter, or calculate from the cutting speed of the closest diameter. For the feed rate per revolution, please set up within the recommended feed rate of the closest diameter appropriately. M M093 DRILLING