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Silver 13/32 inch aircraft extension drill bit, 135 degree split point, black oxide finish

Chicago-Latrobe

Chicago-Latrobe 40584 13/32 in 135° aircraft extension drill

SKU CH-9AXP-93XG2

A 13/32 in high-speed steel drill bit with a 135° split point and black oxide finish for aircraft extension drilling up to 1 5/8 in depth

  • Product typeDrill Bits
  • Main materialHAWA
  • 13/32 in diameter drills wider holes
  • 135° split point starts on contact without wandering
  • High-speed steel with black oxide resists wear and corrosion
  • 1 5/8 in flute length reaches deep cavities
  • 4xD design keeps the bit rigid during extended reach

Chicago-Latrobe 40584 Aircraft Extension Drill

This Chicago-Latrobe 40584 aircraft extension drill features a 13/32 inch fractional size and a 135 degree split point designed for precise drilling in aviation applications. It is manufactured from high speed steel with a black oxide finish and carries a material grade rated for high performance machining. The drill offers a maximum drilling depth of 1 5/8 inches and a 4xD length ratio.

Suited for aviation maintenance

Mechanics and technicians requiring extended reach for drilling rivet holes or accessing confined aircraft structures will find this tool suitable. The 135 degree split point promotes accurate starting without a centre punch. It is not intended for buyers who need a standard jobber length drill or those requiring a different fractional diameter for their specific fastener specifications.

13/32 inch diameter with 135 degree split point

The 13/32 inch cutting diameter combined with the 135 degree split point geometry is the primary specification determining compatibility with the target hole size and material. This specific angle and point style reduces walking and improves chip evacuation in high performance machining grades. Verify the required fastener clearance and material thickness against the 1 5/8 inch maximum drilling depth before selection.

How it compares

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

Price $18.99
Cheaper than about 66% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits
Size & build
Main materialHAWA

Questions about this item

What chuck size is required to hold the 13/32 inch shank on this aircraft extension drill?

A drill chuck that opens to at least 13/32 inch is needed to secure the bit.

How does the 135 degree split point interact with holes started by a standard 135 degree jobber drill?

The matching 135 degree angle lets the extension bit follow the existing pilot without wandering.

What visual cue confirms the black oxide coating is intact after the first few holes?

The dark surface should remain uniform along the flutes with no bright steel showing at the cutting edges.

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