Single End Cobalt High Speed Steel List 531: Single End - Regular Length - 3 Flute List 532: Double End - Regular Length - 3 Flute List 536: Single End - Long Length - 3 Flute Slotting Hardness Up to 145 Brinell Up to 20 HRC 20 to 30 HRC 30 to 40 HRC – Mild SteelsWork MaterialBrassBronzeCast IronMed. Carbon SteelsHigh Carbon SteelHard Brass and BronzeUnalloyed TitaniumMild Steel ForgingsFerritic Low AlloysHigh AlloysTitanium AlloysHigh StrengthStainless SteelsAluminumAluminum Alloys Cutting Speed 115-150 SFM 90-110 SFM 50-65 SFM 15-35 SFM 325-375 SFM Mill Dia. Speed Feed Speed Feed Speed Feed Speed Feed Speed FeedRPMin/minRPMin/minRPMin/minRPMin/minRPMin/min 1/8 4,500 5.5 3,350 3.9 2,000 1.9 1,400 1.0 11,200 12.4 3/16 2,500 7.1 1,900 4.9 1,120 2.4 800 1.4 6,300 15.7 1/4 2,240 7.9 1,700 5.2 1,000 2.5 710 1.4 5,600 15.7 5/16 1,600 9.3 1,180 5.9 710 3.0 500 1.8 4,000 20.9 3/8 1,250 10.2 950 6.7 560 3.1 400 2.0 3,150 19.7 1/2 1,000 9.8 750 5.9 450 3.1 315 2.0 2,500 17.7 5/8 800 8.8 600 5.9 355 3.1 250 2.1 2,000 17.7 3/4 630 8.3 475 4.9 280 2.8 200 2.1 1,600 15.7 1 500 7.1 375 3.9 224 2.4 160 1.7 1,250 14.8 1-1/4 450 6.3 335 3.5 200 2.1 140 1.5 1,120 14.0 1-1/2 355 5.5 265 2.8 160 1.7 112 1.2 900 11.8 When using List Number 536, reduce speeds and feeds by 10%. Depth of Cut: For 3 Flute end mills - (1/3) diameter of the tool 1/3 D Side Milling Hardness Up to 145 Brinell Up to 20 HRC 20 to 30 HRC 30 to 40 HRC – Mild SteelsWork MaterialHard BrassBronzeCast IronMed. Carbon SteelsHigh Carbon SteelHard Brass and BronzeUnalloyed TitaniumMild Steel ForgingsFerritic Low AlloysHigh AlloysTitanium AlloysHigh StrengthStainless SteelsAluminumAluminum Alloys Cutting Speed 155 SFM 115 SFM 70 SFM 40 SFM 395 SFM Mill Dia. Speed Feed Speed Feed Speed Feed Speed Feed Speed FeedRPMin/minRPMin/minRPMin/minRPMin/minRPMin/min 1/8 4,700 5.7 3,516 4.1 2,140 2.0 1,223 0.9 12,076 13.4 3/16 3,200 9.1 2,344 6.0 1,427 3.1 815 1.4 8,051 20.1 1/4 2,350 8.3 1,758 5.4 1,070 2.7 611 1.2 6,038 16.9 5/16 1,896 11.0 1,406 7.0 856 3.6 489 1.8 4,831 25.2 3/8 1,580 12.9 1,172 8.3 713 3.9 408 2.0 4,025 25.2 1/2 1,185 11.6 879 6.9 535 3.7 306 1.9 3,019 21.4 5/8 948 10.4 703 6.9 428 3.7 245 2.1 2,415 21.4 3/4 790 10.4 586 6.0 357 3.6 204 2.1 2,013 19.8 1 592 8.4 439 4.6 268 2.9 153 1.6 1,510 17.9 1-1/4 474 6.6 352 3.7 214 2.2 122 1.3 1,208 15.1 1-1/2 395 6.1 293 3.1 178 1.9 102 1.1 1,006 13.2 When using List Number 536, reduce speeds and feeds by 10%. Depth of Cut: 1.5 D Aa = 1.5D Ar = 0.2D .2D 1134 End Mill Technical WWW.OSGTOOL.COM