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158 158BLACK MAMBAHigh Performance 3XD DRILLS TECHNICAL DATASpeeds and FeedsJOBBER DRILL Material Group Material TypeCutting Speedm/min SFMSteel Structural Steel 60 - 70 197- 230Free Cutting Steel 60 - 70 197 - 230Unalloyed Heat Treatable Steel 60 - 70 197 - 230Unalloyed Case Hardened Steel 60 - 70 197 - 230Alloyed Case Hardened Steel 50 - 60 164 - 197Nitriding Steel 40 -50 131 - 164Acid Resistant / Stainless Steel, 20 - 25 66 - 82High Tensile Steel Alloyed Heat Treatable Steel 40 - 50 131 - 164Tool Steel 40 - 50 131- 164Spring Steel 20 - 25 66 - 82Cast Materials Cast Iron 70 - 80 230 - 263Spheroidal Graphite & Malleable Ci 60 - 70 197 - 230Chilled Ci 10 32 - 49Aluminum & Aluminum Alloys 150 - 180 492 - 590Aluminum Alloys Al Wrought Alloys 150 - 180 492 - 590Al Cast Alloys < 10%si 100 - 130 328 - 427Al Cast Alloys > 10%si 100 - 130 328 - 427Special Alloys Special Alloys 15 - 18 49 - 60Ti Alloys 15 - 20 49 - 65Non Ferrous Metals Copper Low Alloyed 60 - 70 197 - 230Brass 130 - 150 425 - 492Bronze 100 - 110 328 - 360Magnesium Alloys Mg Alloys 120 - 150 393 - 492Jobber DrillTECHNICAL DATA