Drill America
Drill America DWDCO59-64 59/64" Reduced Shank Cobalt Drill Bit
A 59/64" cobalt steel drill bit with a reduced 1/2" shank, HD notched point, 3" flute length and 6" overall length
- TypeDrill Bits
- Cobalt steel resists heat and wear
- Reduced 1/2" shank fits standard chucks
- HD notched point starts holes cleanly
- 3" flute clears chips in deep cuts
59/64" Cobalt Drill Bit for Heavy-Duty Drilling
This reduced-shank cobalt drill bit is built for drilling large-diameter holes in tough metals such as stainless steel and high-tensile alloys. The 59/64-inch size suits maintenance, fabrication and automotive shops that need a single bit for repetitive production work. Its 3-inch flute length and 6-inch overall length provide deep-hole reach without requiring an extended holder. The silver-and-deming shank fits standard 1/2-inch chucks on bench or handheld drills.
Cobalt Steel and Notched Point Extend Bit Life
The cobalt steel construction resists heat buildup during prolonged cuts, reducing edge wear compared with standard high-speed steel. An HD notched point centres the bit quickly and lowers thrust force, so the operator can maintain feed pressure without walking or chatter. These features combine to deliver longer service intervals and fewer bit changes on demanding jobs. The bit is sold individually, ready for immediate use.
Highlights
- Cobalt steel resists heat and wear
- Reduced 1/2" shank fits standard chucks
- HD notched point starts holes cleanly
- 3" flute clears chips in deep cuts
Specifications
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Questions about this item
When will the 59/64" cobalt bit need resharpening or replacement?
Resharpen when the HD notched point no longer self-centres or when chips turn blue from excess heat; cobalt steel holds an edge longer than high-speed steel, so intervals are extended in tough alloys.
What limit appears first during a long run in stainless steel with the .9219" bit?
Heat buildup at the reduced shank junction typically limits continuous drilling before the cobalt flutes lose hardness, so use cutting fluid and peck cycles to manage temperature.
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