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Silver cobalt aircraft extension drill bit with 13/32 inch diameter and 6 inch length

Drill America

Drill America 13/32 in Cobalt Aircraft Extension Drill Bit 6 in

SKU CH-ZBN8-S9JWA

A 13/32 inch cobalt steel drill bit with a 6 inch overall length and heavy-duty split point for aircraft extension drilling

  • TypeDrill Accessories
  • Cobalt steel resists heat during extended drilling
  • 6-inch overall length reaches deep work areas
  • Split point design starts holes without wandering
  • 13/32 inch diameter suits specific fastener sizes

13/32 inch Cobalt Aircraft Extension Bit

This Drill America bit is a power tool accessory made from cobalt steel for heavy-duty drilling. It features a 13/32 inch diameter with a decimal equivalent of .4062. The split point design helps reduce walking and improves starting accuracy. Overall length is 6 inches with a flute length of 3-7/8 inches.

Ideal for deep-hole drilling in tough metals

Suited for mechanics and fabricators needing extended reach in stainless steel or high-strength alloys. Not for buyers who need a shorter jobber length bit for standard drilling. Not for users who require a different diameter or flute length for specific hole depths. Not for applications needing carbide-tipped or diamond-coated tooling.

Highlights

  • Cobalt steel resists heat during extended drilling
  • 6-inch overall length reaches deep work areas
  • Split point design starts holes without wandering
  • 13/32 inch diameter suits specific fastener sizes

Specifications

BrandDrill America
TypeDrill Accessories

Questions about this item

When will the split point on the 13/32 inch cobalt bit need resharpening?

The heavy-duty split point on the cobalt steel bit resists wear longer than standard steel; resharpen when drilling pressure increases or hole quality drops.

What limits continuous drilling with the 6 inch aircraft extension bit?

Heat buildup in the cobalt steel flute is the first limit during sustained use; clear chips frequently and use cutting fluid to maintain performance.

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