Chicago-latrobe 11084 Aircraft Extension Drill Bit 0.055 in

Product Description

The CHICAGO-LATROBE 11084 is a high speed steel aircraft extension drill bit designed for precision drilling in aerospace and general-purpose metalworking applications. Built to Series 906 standards and compliant with NAS 907 Type B, this bit features a 135-degree split point angle with web thinning for reduced thrust and improved self-starting performance. The spiral flute geometry and oxide finish make it well suited for ferrous metals and tough alloys where clean, accurate holes are required. Licensed tradespeople and aerospace maintenance technicians working on structural and sheet metal assemblies will find this bit a reliable production tool.

This drill bit is used in applications requiring extended reach and tight-tolerance hole making in metal substrates. The 0.055-inch diameter corresponds to wire gauge size 54, a common specification in aircraft structural drilling, instrument panel fabrication, and precision sheet metal work. The straight-cylindrical shank provides secure chuck engagement in standard drill chucks and pneumatic drills used in both shop and field service environments.

Key Features

• Wire size 54 (0.055 inches) diameter with tight tolerance of +0.0000 to -0.0005 inches
• 135-degree standard point angle with web-thinned tapered web for reduced entry force
• High speed steel construction for durability across ferrous and general-purpose materials
• Oxide finish provides basic lubricity and corrosion resistance during storage and use
• Right-hand spiral flute with 2-flute configuration for efficient chip evacuation
• Compliant with NAS 907 Type B standard for aircraft-grade drilling applications

Compatibility

Designed as an OEM-style replacement and general-purpose aircraft extension drill bit for use with standard straight-shank drill chucks in keyed, keyless, and pneumatic configurations compatible with 0.055-inch shank diameters.

Installation Notes

Installation and use of this drill bit is typically performed by machinists, aerospace maintenance technicians, or sheet metal workers. Ensure the drill chuck is fully tightened and the workpiece is properly secured before drilling. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and maintain hole tolerance. Inspect the bit for wear or chipping before each use, particularly when working to tight diameter tolerances.