Page 148 - Cobra-Carbide-2020-Catalog

CARBIDE DRILLS

Speeds & Feeds

DRILLS

MICRO GRAIN SOLID CARBIDE

COMBINED DRILLS & SPOTTING DRILLS

Cutting Speed - Combined Drill & Spotting Drill
Material Group Material Type
m/min SFM
Steel Structural Steel 50 - 80 164 -262
Free Cutting Steel 80 - 90 262 - 294

Unalloyed Heat Treatable Steel 50 - 70 164 - 229
Unalloyed Case Hardened Steel 30 - 40 98 - 131
Alloyed Case Hardened Steel 40 - 50 131 - 164
Nitriding Steel 30 - 40 98 - 131
Acid Resistant / Stainless Steel, 35 - 50 114 - 164
Stainless Steel Sulphured Austenitic Steel, Martensitic
High Tensile Steel Alloyed Heat Treatable Steel 40 - 60 131 - 196
Tool Steel 30 - 50 98 - 164
High Speed Steel 30 - 40 98 - 131
Spring Steel
Cast Iron
Cast Materials Spheroidal Graphite & Malleable Ci 50 - 80 164 - 262
DRILLS Aluminum & Aluminum Alloys 100 - 150 327 - 491
50 - 80
164 - 262
30 - 40
Chilled Ci
98 - 131
Aluminum Alloys Al Wrought Alloys 100 - 150 327 - 491
Al Cast Alloys < 10%si 75 - 100 245 - 327

Al Cast Alloys > 10%si 50 - 70 164 - 229
Special Alloys Special Alloys 30 - 40 98 - 131
Ti Alloys 20 - 30 65 - 98
Non Ferrous Metals Copper Low Alloyed 120 - 150 393 - 491
Brass 120 - 150 393 - 491
Bronze 40 - 60 131 - 196
Magnesium Alloys Mg Alloys 100 - 120 327 - 393

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