Cleveland Twist Drill Q Cobalt Drills
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
- 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.