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Chicago-Latrobe 11115 aircraft extension drill bit 23/64 inch black oxide finish 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 11115 135 Degree NAS-Type Aircraft Extension Drill 23/64 in

SKU CH-DAZA-45G92

135-degree split-point aircraft extension drill bit, 23/64 inch high-speed steel with black oxide finish for deep-hole machining

  • Product typeDrill Accessories
  • 135-degree split point reduces walking for accurate starts
  • 23/64 inch fractional size fits standard aerospace fastener holes
  • High-speed steel with black oxide finish resists wear during deep drilling
  • 3-1/2 inch maximum depth handles extended-reach applications
  • NAS-type design meets aircraft manufacturing specifications

Aircraft Extension Drill 23/64 in

This Chicago-Latrobe drill bit is a high-speed steel accessory built for deep-hole drilling tasks. Its 135-degree split point reduces walking and delivers accurate starts in metal. The black oxide finish adds wear resistance and chip flow. It suits maintenance and fabrication shops that need reliable extension reach.

NAS-Type 135 Degree Split Point

The bit requires a compatible drill chuck or collet that accepts a 23/64 in shank. Its 4xD proportion and 3 1/2 in maximum drilling depth free the operator from frequent bit changes in deep cavities. The 28-degree helix angle supports efficient chip evacuation in aircraft-grade alloys. High-speed steel construction handles the heat of extended cuts.

Machining High Performance Grade

This tool fits machinists working with fractional-inch specs who need a single long-reach bit for tough materials. Buyers who want more storage or a multi-bit set should look at something else. Shops needing carbide tips or coolant-through capability will not find those features here. The 11115 model addresses a specific deep-drilling need without extra complexity.

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 Accessories

Questions about this item

How deep can the 11115 drill bit reach in a single pass?

The 11115 bit has a maximum drilling depth of 3 1/2 inches, set by its 4xD design.

Does the 135-degree split point on the 11115 generate excess heat during extended drilling?

The 135-degree split point and black oxide finish on the 11115 are designed to reduce heat buildup and improve chip evacuation in high-speed steel.

What shank size must my drill chuck accept to hold the 11115 bit?

The 11115 is a 23/64 inch fractional inch bit, so your chuck must accommodate that diameter.

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