Chicago-latrobe 11107 Aircraft Extension Drill 15/64 in

Product Description

The CHICAGO-LATROBE 11107 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the workpoint. Built to Series 912 specifications and compliant with NAS 907 Type B standards, this bit features a 135-degree split point that is self-centering and eliminates the need for a center punch on most materials. The oxide finish provides mild lubricity and corrosion resistance during use. With a 15/64 inch diameter and 12 inch overall length, it delivers extended reach without sacrificing accuracy or rigidity.

This extension drill bit is suited for aerospace fabrication, structural steel work, sheet metal assembly, and maintenance applications where drilling through deep cavities or stacked materials is required. The tapered web configuration and web-thinned geometry reduce thrust requirements and improve chip evacuation during extended-reach cuts. It is commonly used by aircraft maintenance technicians, millwrights, and metalworking professionals working in confined or hard-to-reach drilling environments.

Key Features

• 135-degree split point is self-centering, reducing walking and eliminating most center-punch steps
• 12 inch overall length provides extended reach for deep-cavity and stacked-material drilling
• High speed steel construction handles general-purpose metalworking across a wide range of materials
• Oxide finish adds surface lubricity and light corrosion resistance
• Tapered web with web thinning reduces drilling thrust and improves chip flow
• Right-hand cutting, straight-cylindrical shank for standard chuck compatibility
• NAS 907 Type B compliant for aerospace and structural applications

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for applications requiring a 15/64 inch straight-shank extension drill conforming to NAS 907 Type B standards in Series 912 configurations.

Installation Notes

This bit is installed and operated by machinists, aircraft maintenance technicians, and metalworking tradespeople using standard drill motors or drill presses with a compatible chuck. Secure the straight-cylindrical shank firmly in the chuck before operation to prevent slippage during extended-reach drilling. Use appropriate cutting fluid for the workpiece material to extend bit life and improve cut quality. Inspect the split point for wear or chipping before each use, as a damaged point will compromise self-centering performance.