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Extra long #40 aircraft drill bit, 12 in bright high speed steel, 135 degree split point

Cleveland Golf

Cleveland Golf C13244 #40x12 In HSS pneumatic accessory

SKU CH-66SD-NV541 MPN C13244

Extra-long #40 HSS drill bit with 135-degree split point for precision aircraft work

  • Product typeDrill Accessories
  • Main materialHigh speed steel
  • Extra-long 12 in reach for deep holes
  • #40 wire-gauge size drills precise small diameters
  • 135° split point starts fast with less wandering
  • High-speed steel body resists wear in tough materials
  • Bright uncoated finish suits general-purpose machining

Product Identity

This Cleveland Golf C13244 is an extra-long aircraft extension drill bit made from high speed steel. It is designed for precision drilling tasks where extended reach is required in workshop or maintenance settings.

Intended Users and Limits

Machinists and technicians needing a #40 wire-size bit with a 135-degree split point for accurate starting will find this suitable. Buyers requiring a coated cutting surface or a larger diameter for heavy material removal should look at alternative tooling.

Capacity and Headroom

The bit offers a maximum drilling depth of 25/64 in with a 4xD length-to-diameter ratio. Its 135-degree point angle and 21 to 34-degree helix range handle general machining well, but the uncoated bright finish wears faster in abrasive or high-heat applications.

How it compares

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

Price $8.99
Cheaper than about 90% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCleveland
Model nameC13244
Product typeDrill Accessories
Size & build
Main materialHigh speed steel

Questions about this item

What chuck capacity do I need to hold the #40 shank on this drill bit?

A chuck that accepts a #40 wire-gauge shank will grip the bit securely.

Will the 135-degree split point start cleanly in the softer metals I usually drill with older bits?

Yes, the 135-degree split point is designed to reduce walking and start accurately in a range of materials.

How can I confirm the bit is cutting correctly once I begin drilling?

The bit should produce consistent chips and reach the 25/64 in maximum drilling depth without excessive force or wandering.

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