Chicago-latrobe 11124 Aircraft Extension Drill Bit Hss

Product Description

The CHICAGO-LATROBE 11124 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications where standard-length bits cannot access the work area. It measures 0.5 inches in diameter with a 4.5-inch spiral flute length and a 12-inch overall length, making it well-suited for reaching into confined spaces or through thick material stacks. The 135-degree split point is self-centering, eliminating the need for a center punch on most materials and reducing walking on entry. The oxide finish provides mild corrosion resistance during storage and use. This bit is a general-purpose tool used by aircraft maintenance technicians, industrial fabricators, and professional tradespeople working with structural assemblies.

The 11124 fits applications where extra reach is required, such as drilling through deep structural members, sheet metal stacks, or framing assemblies that standard jobber-length bits cannot reach. Its straight-cylindrical shank seats in standard drill chucks without adapters. It conforms to NAS 907 Type B standards, which is relevant for aerospace and defense maintenance work. The two-flute spiral design evacuates chips efficiently during extended drilling runs. Right-hand cutting direction is standard for conventional drill press and hand-drill operation.

Key Features

• 135-degree split point is self-centering and reduces drill walking on entry
• 12-inch overall length provides extended reach for deep or obstructed work areas
• High speed steel construction handles a wide range of metals and composite materials
• Oxide finish offers light corrosion resistance during storage and field use
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters
• Meets NAS 907 Type B standards for aerospace-grade dimensional and performance requirements
• Web-thinned tapered web reduces thrust load and improves chip clearance

Compatibility

Designed as an OEM-style general-purpose aircraft extension drill bit compatible with any standard drill chuck accepting a 0.5-inch straight-cylindrical shank, including drill presses, magnetic base drills, and heavy-duty hand drills used in industrial and aerospace maintenance applications.

Installation Notes

Installation of this drill bit is performed by machinists, aircraft maintenance technicians, and industrial tradespeople using standard drill equipment. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck key is removed before powering the drill. Use appropriate cutting fluid or lubricant when drilling through steel or aluminum to extend bit life and improve hole finish. Wear appropriate PPE including eye protection and gloves when operating.