Chicago-latrobe 11179 Aircraft Extension Drill Bit Hss

Product Description

The CHICAGO-LATROBE 11179 is a wire gauge size 55 aircraft extension drill bit designed for precision drilling in tight or deep-access applications. Built from high speed steel with an oxide finish, this bit delivers consistent performance in general-purpose drilling tasks where standard-length bits cannot reach. The 135-degree split point angle reduces walking on entry and minimizes the need for a center punch. With a straight-cylindrical shank measuring 0.052 inches in diameter, it seats securely in standard drill chucks. Licensed tradespeople and production floor technicians reach for this bit when working in sheet metal, aerospace panel work, or any application demanding a compact diameter with extended reach.

The 11179 is sized to wire gauge 55, which corresponds to 0.052 inches in decimal. The flute length measures 0.875 inches with a spiral, two-flute configuration and a tapered web design. The overall length of 12 inches provides the extended reach typical of aircraft-series drill bits used in fuselage panels, HVAC sheet metal work, electrical panel fabrication, and similar precision trade applications where clearance depth is a limiting factor. This bit cuts right-hand and meets NAS 907 Type B standards.

Key Features

• Wire gauge size 55 (0.0520 inches decimal) with tight diameter tolerance of +0.0000 to -0.0005 inches
• 135-degree standard point angle with web-thinned, tapered web for reduced thrust and cleaner entry
• High speed steel construction with oxide finish for general-purpose durability
• 12-inch overall length provides aircraft-style extended reach in confined or deep drilling scenarios
• Straight-cylindrical shank at 0.052 inches seats in standard keyless or keyed drill chucks
• Meets NAS 907 Type B standards for aircraft and precision drilling applications

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for applications requiring a wire gauge size 55, Series 912 aircraft extension drill meeting NAS 907 Type B specifications.

Installation Notes

This bit is installed by machinists, sheet metal mechanics, aircraft maintenance technicians, and electricians using standard drill presses, hand drills, or right-angle drill attachments. Ensure the workpiece is secured before drilling and confirm the chuck is tightened firmly around the straight-cylindrical shank to prevent slippage. Use appropriate cutting fluid for harder stock materials to extend bit life. Wear approved eye protection when operating at speed with small-diameter bits.