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Bronze cobalt drill bit, 15/32 inch, reduced 3/8 shank

Drill America

Drill America 15/32in Cobalt Reduced Shank Drill Bit x 3/8 Shank pneumatic accessory

SKU CH-MVGG-H5BBG

Cobalt steel drill bit with a reduced 3/8 shank for drilling 15/32 inch holes in hard materials

  • Product typeDrill Accessories
  • Cobalt steel resists heat during heavy drilling
  • 3/8 reduced shank fits standard drill chucks
  • Bronze oxide finish reduces friction and wear
  • 15/32 inch size matches precise hole requirements

Drill America Cobalt Reduced Shank Bit

This Drill America cobalt drill bit is built for metalworking tasks that demand heat resistance and durability. The reduced shank design allows it to fit 3/8-inch chucks while maintaining a larger cutting diameter. It suits mechanics and fabricators who need reliable performance in tough alloys.

Thermals Noise and Power Draw

Cobalt steel construction helps the bit run cooler during extended drilling in hard materials. Bronze oxide surface treatment reduces friction and chip welding for smoother cuts. The flute geometry clears debris efficiently to prevent binding and overheating. Power draw depends entirely on the drill motor and feed pressure applied.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 77% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How do I install the 15/32" cobalt drill bit with a 3/8" reduced shank, and what step do people often miss?

Insert the 3/8" reduced shank fully into the chuck and tighten securely on the flats; the step often missed is not seating the shank completely, which causes run-out on the .4688" cutting diameter.

What maintenance or replacement will this cobalt drill bit need later?

Resharpen the 15/32" cobalt cutting edges when they dull; the bronze oxide coating on the 4-5/16" flutes wears off over time, so replace the bit once the cobalt substrate is too short to regrind.

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