Chicago-latrobe 11046 Aircraft Extension Drill Bit

Product Description

The CHICAGO-LATROBE 11046 is a high speed steel aircraft extension drill bit engineered for reaching into deep or recessed bore locations where standard-length bits cannot access. It carries a wire gauge size of 16 (0.1770 inches decimal diameter) and an overall length of 6 inches, with a flute length of 2.1875 inches. The 135-degree split point is web-thinned and self-centering, reducing the need for a center punch and minimizing walking on entry. An oxide finish provides mild corrosion resistance and reduces friction during cutting. Machinists, aircraft maintenance technicians, and general fabrication tradespeople use this bit for drilling through metal, composite, and structural materials in tight-clearance applications.

This drill bit is suited for aerospace, sheet metal, and general industrial applications where extended reach is required. The Series 906 designation meets NAS 907 Type B standards, making it appropriate for use in aerospace maintenance and repair operations. The straight-cylindrical shank fits standard 3-jaw drill chucks and extension holders. Right-hand spiral flutes evacuate chips efficiently during through-hole and blind-hole drilling in steel, aluminum, and similar materials.

Key Features

• 135-degree split point with web thinning for self-centering entry and reduced thrust
• Tapered web configuration improves rigidity and chip evacuation over the full flute length
• High speed steel construction rated for general purpose metal cutting
• Oxide finish reduces surface friction and provides light corrosion protection
• Diameter tolerance of +0.0000 to -0.0007 inches for consistent hole sizing
• Meets NAS 907 Type B standard for aircraft-grade drilling applications

Compatibility

Designed as an OEM-style replacement and standard-supply drill bit for use in any 3-jaw chuck or drill holder accepting a 0.1770-inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by a qualified machinist, aircraft mechanic, or trained technician familiar with drill press or hand-drill operation. Secure the workpiece before drilling and verify the chuck is properly tightened on the straight shank before operation. Use appropriate cutting fluid for the material being drilled to extend tool life and maintain hole tolerance. Inspect the cutting edges for wear before each use and replace the bit if the point shows chipping or dulling.