Drill America
Drill America DWDCO7-8 7/8" Reduced Shank Cobalt Drill Bit
A 7/8 inch cobalt drill bit with a reduced shank for heavy-duty drilling in hard metals
- TypeDrill Bits
- Cobalt steel resists heat during heavy drilling
- HD notched point starts holes without walking
- Reduced 1/2" shank fits standard chucks
- 3" flute length clears chips efficiently
Cobalt steel bit with reduced shank
This 7/8 inch cobalt steel drill bit features a reduced shank that fits standard half-inch chucks. The heavy-duty notched point is designed to start cleanly and resist walking on hard metals. It suits machinists and maintenance technicians who need a single large-diameter bit for tough alloys.
Sustained drilling in hard materials
Cobalt alloy retains hardness at the elevated temperatures produced during extended cuts in stainless steel or high-strength alloys. The 3 inch flute length clears chips efficiently to reduce heat buildup. Builders who need a full set of step sizes or a bit for non-ferrous sheet metal should choose a different tool.
Highlights
- Cobalt steel resists heat during heavy drilling
- HD notched point starts holes without walking
- Reduced 1/2" shank fits standard chucks
- 3" flute length clears chips efficiently
Specifications
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Questions about this item
How much heat does the 7/8" cobalt bit generate during extended drilling?
Cobalt steel dissipates heat better than standard high-speed steel, so the bit runs cooler during long sessions in tough metal.
What chuck size is required for the 1/2" reduced shank?
A 1/2" or larger drill chuck is needed to grip the reduced shank securely.
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