(inch) Gray Cast Iron ( < 350MPa) Ductile Cast Iron ( < 450MPa) Work Material No45B etc. 60-60-8 etc. DC Cutting Speed vc Feed fr Cutting Speed vc Feed fr L/D (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) (Min. ─ Max.) inch mm (SFM) (IPR) (SFM) (IPR) .0394 1.0 2,7DC≥12DC 165 (130─195) .0016 (.0008─.0020) 130 (100─150) .0016 (.0008─.0020)130 (100─150).0008 (.0004─.0012)100 (65─115).0008 (.0004─.0012) .0591 1.5 2,7DC≥12DC 165 (130─195) .0020 (.0012─.0031) 130 (100─150) .0020 (.0012─.0031)130 (100─150).0020 (.0008─.0031)100 (65─115).0020 (.0008─.0031) .0787 2.0 2,7DC≥12DC 165 (130─195) .0028 (.0016─.0039) 130 (100─150) .0028 (.0016─.0039)165 (130─195).0028 (.0016─.0039)165 (130─195).0028 (.0016─.0039) .0984 2.5 2,7DC≥12DC 195 (150─230) .0035 (.0020─.0051) 165 (130─195) .0035 (.0020─.0051)165 (130─195).0035 (.0024─.0051)165 (130─195).0031 (.0020─.0047) 2DC 295 (195─360) .0075 (.0043─.0102) 295 (195─360) .0067 (.0039─.0094) .1260 3.2 3,5,8DC10,15,20,25,30DC295 (230─345)295 (195─360).0039 (.0024─.0051).0075 (.0043─.0102)215 (165─245)295 (195─360).0039 (.0024─.0051).0067 (.0039─.0094) 35,40DC 245 (150─310) .0059 (.0035─.0083) 100 (65─165) .0055 (.0031─.0075) 2DC 330 (230─395) .0087 (.0051─.0130) 295 (195─360) .0079 (.0047─.0118) .1575 4.0 3,5,8DC10,15,20,25,30DC330 (260─375)295 (195─360).0047 (.0031─.0063).0087 (.0051─.0130)215 (165─245)295 (195─360).0047 (.0031─.0063).0079 (.0047─.0118) 35,40DC 245 (150─310) .0071 (.0039─.0102) 100 (65─165) .0063 (.0039─.0094) 2DC 330 (230─395) .0110 (.0028─.0154) 295 (195─360) .0098 (.0059─.0138) .1969 5.0 3,5,8DC10,15,20,25,30DC330 (260─375)295 (195─360).0059 (.0039─.0079).0110 (.0028─.0154)215 (165─245)295 (195─360).0059 (.0039─.0079).0098 (.0059─.0138) 35,40DC 245 (150─310) .0087 (.0024─.0122) 100 (65─165) .0079 (.0047─.0110) 2DC 360 (260─425) .0118 (.0075─.0161) 330 (230─395) .0106 (.0067─.0146) .2480 6.3 3,5,8DC10,15,20,25,30DC360 (280─410)360 (260─425).0079 (.0051─.0102).0118 (.0075─.0161)230 (180─260)330 (230─395).0079 (.0051─.0102).0106 (.0067─.0146) 35,40DC 295 (195─360) .0094 (.0059─.0130) 130 (100─195) .0087 (.0055─.0118) 2DC 395 (295─460) .0130 (.0087─.0173) 330 (230─395) .0118 (.0079─.0157) .3150 8.0 3,5,8DC10,15,20,25,30DC395 (310─445)360 (260─395).0098 (.0071─.0122).0130 (.0087─.0173)230 (180─260)330 (230─395).0091 (.0071─.0110).0118 (.0079─.0157) 35,40DC 295 (195─330) .0102 (.0071─.0138) 130 (100─195) .0094 (.0063─.0126) 2DC 425 (330─460) .0138 (.0094─.0181) 330 (230─395) .0126 (.0087─.0165) .3937 10.0 3,5,8DC10,15,20,25,30DC425 (330─490)360 (260─395).0114 (.0087─.0138).0138 (.0094─.0181)230 (180─260)330 (230─395).0106 (.0087─.0126).0126 (.0087─.0165) 35,40DC 295 (195─330) .0110 (.0075─.0146) 130 (100─195) .0102 (.0071─.0134) 2DC 460 (330─490) .0146 (.0102─.0189) 395 (295─460) .0134 (.0094─.0173) .4724 12.0 3,5,8DC10,15,20,25,30DC460 (360─525)425 (295─460).0126 (.0102─.0146).0146 (.0102─.0189)295 (230─345)395 (295─460).0118 (.0102─.0134).0134 (.0094─.0173) 35,40DC 345 (210─375) .0118 (.0083─.0150) 165 (130─230) .0106 (.0075─.0138) M 2DC 525 (395─560) .0157 (.0114─.0189) 395 (295─460) .0142 (.0102─.0181) .6299 16.0 3,5,8DC10,15,20,25,30DC525 (410─590)425 (295─460).0138 (.0110─.0165).0157 (.0114─.0189)295 (230─345)395 (295─460).0130 (.0110─.0150).0142 (.0102─.0181) 35,40DC 345 (210─375) .0126 (.0091─.0150) 165 (130─230) .0114 (.0083─.0146) .7874 20.0 3,5,8DC 525 (410─590) .0146 (.0118─.0173) 330 (260─375) .0138 (.0118─.0157) 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. M079 DRILLING