Cleveland C13107 Aircraft Extension Drill Bit 5/32 in Hss

Product Description

The CLEVELAND C13107 is an aircraft extension drill bit designed for precision drilling in tight-clearance and hard-to-reach applications. Built from high-speed steel with a bright uncoated finish, it measures 5/32 inch (0.1563 inch decimal) in diameter and 6 inches in overall length, with a 2-inch spiral flute. The 135-degree split point is self-centering and reduces walking on entry, making it suitable for use on metal, aluminum, and composite materials common in aviation maintenance, sheet metal fabrication, and general mechanical work. The web-thinned, tapered web configuration reduces thrust and improves chip evacuation in deeper bores. This bit is part of Cleveland Series 3957-6 and meets NAS 907 Type B standards.

This bit is well suited for aircraft maintenance technicians, sheet metal mechanics, and industrial fabricators who need extended reach without sacrificing hole accuracy. The 6-inch overall length provides clearance in confined spaces such as airframe ribs, structural brackets, and deep flanged assemblies. Right-hand cutting direction and straight cylindrical shank make it compatible with standard drill chucks and right-angle drill attachments commonly used in aviation and sheet metal trades.

Key Features

• 135-degree split point is self-centering and reduces drill walking on entry
• Web-thinned, tapered web reduces drilling thrust and improves chip flow
• 6-inch overall length provides extended reach in confined or obstructed work areas
• High-speed steel construction handles ferrous and non-ferrous metals and composites
• Bright uncoated finish allows easy visual inspection for wear or damage
• Meets NAS 907 Type B standards for aircraft-grade tooling requirements

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 Type B. Compatible with standard drill chucks accepting a 5/32-inch straight cylindrical shank.

Installation Notes

Installation of this drill bit should be performed by qualified aircraft maintenance technicians, sheet metal mechanics, or trained industrial workers following applicable maintenance manuals and safety procedures. Secure the shank fully in the chuck before applying power and verify chuck tightness to prevent slippage. Always wear appropriate eye protection and secure the workpiece before drilling. Inspect the bit for wear, chipping, or deformation before each use and replace if cutting performance degrades.