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Silver cobalt drill bit, 31/32 inch, reduced 1/2 inch shank, bronze oxide finish

Drill America

Drill America 31/32in 1/2in Reduced Shank Cobalt Silver and Deming Drill Bit pneumatic accessory

SKU CH-23XH-747GZ

A 31/32 inch cobalt drill bit with a 1/2 inch reduced shank for use in larger drill chucks

  • Product typeDrill Accessories
  • 31/32 inch diameter drills large holes precisely
  • Reduced 1/2 inch shank fits standard drill chucks securely
  • Cobalt steel construction resists heat during heavy cutting
  • Bronze oxide coating extends bit life in tough materials

Drill America 31/32in Cobalt Drill Bit

This Drill America bit is a 31/32in reduced-shank cobalt drill bit built for power and pneumatic tools. The cobalt steel construction supports drilling in tough materials where standard bits wear quickly. Its bronze oxide finish helps reduce friction and resist heat during operation. It fits 1/2in chucks for broad machine compatibility.

Capacity and headroom for heavy drilling

The bit handles holes up to 31/32in with a 3in flute length and 6in overall length for deep cuts. The reduced shank allows use in machines limited to 1/2in capacity. It runs out when material hardness exceeds cobalt steel limits or when hole diameters exceed the 31/32in size. Buyers needing larger diameters or non-cobalt substrates should look elsewhere.

How it compares

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

Price $44.99
Pricier than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Will the 31/32in reduced shank fit my existing 1/2in drill chuck without an adapter?

Yes, the 1/2in reduced shank is designed to fit directly into a standard 1/2in drill chuck, so no adapter is required for that connection.

How can I confirm the cobalt steel bit is cutting correctly after I start drilling?

The bronze oxide coating should wear evenly along the flutes, and the bit should produce consistent, non-discoloured chips without excessive heat buildup at the 31/32in diameter.

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