Chicago-latrobe 11110 9/32 in Aircraft Extension Drill Bit

Product Description

The CHICAGO-LATROBE 11110 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work area. Built to Series 912 specifications, it features a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on hard or curved surfaces. The oxide finish provides a degree of lubricity and corrosion resistance during use. With a 9/32-inch diameter (0.2813 inches) and a 12-inch overall length, this bit is suited for structural, aerospace-style, and general metalworking tasks requiring extended reach. It is installed and used by machinists, aircraft maintenance technicians, and skilled trade professionals.

The 11110 is applicable in situations where access depth or clearance prevents the use of standard-length twist drills. A 2-15/16-inch flute length provides adequate chip evacuation even in deep holes. The straight-cylindrical shank accepts standard drill chucks without adapters. Right-hand cutting direction makes it compatible with conventional drill presses, hand drills, and magnetic base drills. Its general-purpose tool performance rating means it handles a broad range of materials including mild steel, aluminum, and similar metals encountered in fabrication and maintenance work.

Key Features

• 135-degree split point for self-centering starts without a center punch
• 12-inch overall length for extended reach in tight or deep-clearance applications
• High speed steel construction for durability across general-purpose metalworking
• Web-thinned, tapered web configuration aids chip clearance and reduces thrust
• Oxide finish for added lubricity and surface protection
• Meets NAS 907 Type B standards

Compatibility

Designed as an OEM-style replacement or direct-use aircraft extension drill bit for applications conforming to NAS 907 Type B standards; fits any standard drill chuck accepting a 9/32-inch straight-cylindrical shank.

Installation Notes

Aircraft extension drill bits should be installed and operated by qualified machinists or maintenance technicians familiar with proper drilling procedures. Secure the workpiece fully before drilling and confirm chuck grip is firm before applying power. Use appropriate cutting fluid for the material being drilled to extend bit life and improve hole quality. Inspect the cutting edges and split point before each use and retire the bit if chipping or excessive wear is observed.