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Chicago-Latrobe 11013 aircraft extension drill, black oxide finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 11013 135 Degree Aircraft Extension Drill

SKU CH-F86N-XS6QK

135-degree split-point drill bit in high-speed steel with black oxide finish, 28-degree helix for chip evacuation, 11013 model

  • 135-degree split point starts on contact without wandering
  • High-speed steel with black oxide resists wear during extended use
  • 28-degree helix clears chips efficiently from deep holes
  • 1/4-inch fractional size fits standard aircraft applications
  • 11013 model built to NAS-type specification for precision drilling

Chicago-Latrobe 11013 Aircraft Extension Drill

The Chicago-Latrobe 11013 is a NAS-type aircraft extension drill built from high-speed steel with a black oxide finish. It features a 135-degree split point designed for self-centering and reduced thrust. The tool is manufactured to high-performance machining grade standards.

Suited for precision drilling in aerospace

This drill suits technicians producing deep, accurate holes in aircraft structures where extension reach is required. The fractional inch sizing matches legacy airframe specifications. Buyers needing metric dimensions or different point geometries should look at other options.

High-speed steel and black oxide finish

The high-speed steel substrate maintains hardness at elevated temperatures during extended drilling cycles. Black oxide surface treatment adds lubricity and corrosion resistance. Together they extend tool life in demanding production environments.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 97% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameCHICAGO-LATROBE

Questions about this item

What size drill chuck do I need to hold the 1/4 inch shank of the Chicago-Latrobe 11013?

The bit has a 1/4 inch shank, so a chuck that opens to at least 1/4 inch is required.

Will the 135 degree split point on this bit work effectively in the older alloy steel I keep in my workshop?

The 135 degree split point is designed for high-performance machining and helps reduce walking on tough materials.

How can I confirm the Chicago-Latrobe 11013 is drilling correctly once I start using it?

A clean, centred hole with minimal wandering at the start indicates the split point is working as intended.

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