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Silver 12 inch cobalt drill bit with 15/32 inch diameter and long flute

Drill America

Drill America 15/32in 12in Cobalt Aircraft Extension Drill Bit pneumatic accessory

SKU CH-BX7Q-WSGRD

A 12-inch cobalt aircraft extension drill bit with a 15/32-inch split point for deep-hole drilling in hard metals

  • Product typeDrill Accessories
  • 15/32 inch size drills precise holes in tough materials
  • Cobalt steel construction resists heat and extends bit life
  • 12 inch overall length reaches deep or confined work areas
  • Heavy duty split point starts fast without walking

Drill America 15/32in Cobalt Extension Bit

This Drill America accessory is a cobalt steel aircraft extension drill bit built for heavy-duty drilling tasks. The split-point design helps reduce walking and improves starting accuracy in tough materials. It suits maintenance technicians and metalworkers who need extended reach for deep-hole applications.

Simple chuck installation

The bit fits directly into compatible drill chucks without adapters or special tooling. Cobalt steel resists heat but can chip if side pressure is applied during deep cuts. Users must clear chips frequently to prevent binding in the 4-5/16 flute length.

How it compares

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

Price $25.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How can I confirm the 15/32 inch cobalt bit is drilling true after setup?

Check that the split point centres without walking and that the 4-5/16 inch flute clears chips cleanly at the 12 inch overall length.

What comes in the box and do I need a separate pilot bit for the .4688 decimal size?

The package contains the single 15/32 inch cobalt aircraft extension drill bit; no pilot bit or additional accessories are included.

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