Inconel drill bits

Drill bits come in a wide range of shapes and sizes, and are available in a variety of materials and coatings. Most tooling and machining operations have a drill bit that’s designed specifically for the task. Here’s a quick overview of several types of drill bits, materials and design types.

Drilling – When using insert drills in CNC machines use the same speeds (SFM) for facing, turning and boring for the specific alloy. Feed rates should be .002” per revolution. When twist drill bits are used, cobalt drills are preferred but high speed steel (HSS) drills will also work as long as you keep the speed slow and steady. Solid carbide drills work well in some applications.


High-Speed Steel (HSS) is a popular material good for drilling into soft steels as well as wood and plastic. IT’s an economical solution for most maintenance drilling applications.

Cobalt (HSCO) is considered an upgrade from HSS because it includes 5-8% Cobalt blended into the base material. This is a great option for drilling into harder steel as well as stainless steel grades.

Carbide (Carb) is the hardest and most brittle of the drill bit materials. It’s used mostly for production drilling where a high-quality tool holder and equipment is used. It should not be used in hand drills or even drill presses. These drill bits are designed for the most demanding and hardest materials.

Inconel drill bits grades:

  • Alloy 600
  • Alloy 601
  • Alloy 625
  • Alloy 690
  • Alloy 713C
  • Alloy 718
  • Alloy 751
  • Alloy 792
  • Alloy 939
  • Alloy 188
  • Alloy X-750
  • Alloy 230
  • Alloy 907
  • Alloy 909
  • Alloy 706
  • Alloy 617