We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver cobalt steel aircraft extension drill bit 19/64 inch diameter 12 inch overall length split point tip

Drill America

Drill America 19/64in x 12in Cobalt Aircraft Extension Drill Bit pneumatic accessory

SKU CH-BP80-XQFNZ

A 19/64 inch cobalt aircraft extension drill bit with a 12 inch overall length and heavy-duty split point for deep-hole drilling

  • Product typeDrill Accessories
  • Extended reach for deep holes with 12 inch overall length
  • Cobalt steel resists heat and wear during heavy-duty drilling
  • Split point design starts on contact without walking
  • 19/64 inch diameter matches precise fastener requirements

19/64-inch Cobalt Aircraft Extension Bit

The Drill America cobalt aircraft extension drill bit measures 12 inches overall with a 19/64-inch diameter. Heavy-duty cobalt steel construction resists heat and wear during extended drilling tasks. The split-point tip reduces walking and starts holes cleanly in metal workpieces.

Sustained-load behaviour

Cobalt alloy retains hardness at elevated temperatures generated by continuous drilling. The 12-inch length reaches deep or awkward holes without excessive pressure. Flute geometry clears chips efficiently during prolonged use. Not suited for buyers needing shorter bits or smaller diameters for confined spaces.

How it compares

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

Price $13.99
Cheaper than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

How much heat does the 12-inch cobalt bit generate when drilling all day?

Cobalt steel dissipates heat better than standard high-speed steel, so the 12-inch bit runs cooler during extended drilling sessions.

What chuck size is needed to hold the 19/64-inch shank?

A 1/2-inch or larger drill chuck is required to grip the 19/64-inch shank securely.

More in Bits, Hole Saws & Accessory Kits

Similar items