Cleveland Twist Drill Q Cobalt Drills

Features & Benefits


Cleveland Twist Drill Q-Cobalt DrillsSuperior Flute Form, Unique Point Geometry, and Premium Cobalt Material Combine to Outperform the Competition


  • Wider parabolic flute style
  • 135° self-centering point with modified notch provides greater stability, prevents "walking" and lessens work hardening, dramatically improving production.
  • Premium 8% cobalt construction
  • Available in jobber, taper, and screw machine lengths
  • Available with straw color oxide, TiN, TiCN, or TiAlN high performance coatings
  • Parabolic flute form and point combination produces closer hole tolerances, heightened chip breaking action and improved coolant flow for deep-hole drilling in a wide range of materials
  • Runs at higher speeds and feeds than conventional parabolic drills
  • Modified notch point provides greater stability, prevents "walking" and lessens work hardening with less thrust
  • Wider flute spacing disperses chips away from the cutting edge more rapidly than conventional parabolic drills, resulting in tighter, more manageable chips, and less chip packing
  • Better chip control means increased volume of coolant flow, better workpiece surface finish, and less down time for chip removal
  • Cobalt excels in work hardening materials like high-strength alloy steels, stainless steels, high speed steels, chilled cast iron and tool steels
  • Ideal for deep-hole drilling in a wide range of materials
  • TiN (titanium nitride, gold color) coating offers added lubricity and hardness resulting in improved chip flow, significantly improved wear life and finished hole quality. TiN coatings are used in a broad range of materials, especially ferrous materials, typically at as much as 35% greater drilling speeds than uncoated tools.
  • TiCN (titanium carbonitride, blue-gray color) is harder, tougher and more wear resistant than TiN and is engineered for very aggressive machining in a broad range of materials, including ferrous and nonferrous materials, under conditions of moderate cutting temperatures. TiCN may be run at 50% higher cutting speeds than uncoated tools.
  • TiAlN (titanium aluminum nitride, violet color) coating are designed for very aggressive machining of stainless steels, high alloy carbon steels, nickel-based high temp alloys and titanium alloys. They can run at 100% greater speeds than uncoated drills and offer improved wear life, especially in conditions where high temperatures can be generated. Use with caution in nonferrous materials because of tendency to gall.