Precision Twist Drill 6001261 Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001261 is a high speed steel aircraft extension drill bit designed for precision hole-making in aerospace and general-purpose metalworking applications. Built to Series 501-6 standards, it features a 135-degree split point for self-centering entry without a center punch and a spiral flute geometry with web thinning for reduced thrust and cleaner chip evacuation. The straight cylindrical shank measures 0.111 inches in diameter and accepts standard drill chucks. An oxide finish provides mild corrosion resistance during storage and use. Licensed HVAC technicians, aircraft maintenance professionals, and sheet metal workers reach for this bit when clearance or depth requires an extended reach tool.

This drill bit is sized at wire gauge 34, with a decimal diameter of 0.111 inches and a flute length of 1.5 inches, giving a flute-to-diameter ratio of 4xD. It is suited for right-hand cutting in ferrous and non-ferrous metals in both production and field service environments. The self-centering split point makes it particularly effective on curved or angled surfaces where walking is a concern. Typical applications include airframe work, bracket fabrication, and any task requiring consistent small-diameter holes in tight or extended-reach locations.

Key Features

• 135-degree split point with self-centering geometry eliminates the need for a center punch on most surfaces
• Web-thinned tapered web reduces cutting resistance and improves chip flow
• High speed steel construction handles general-purpose metal drilling at standard cutting speeds
• Oxide finish provides surface protection during storage and handling
• Straight cylindrical shank at 0.111 inches fits standard drill chucks without adapters
• Meets NAS 907 Type B standards for aircraft extension drill applications

Compatibility

Designed as an OEM-style replacement and standard-issue aircraft extension drill bit compatible with any drill chuck accepting a 0.111-inch straight cylindrical shank in applications governed by NAS 907 Type B specifications.

Installation Notes

Installation of this drill bit is performed by machinists, sheet metal workers, and aircraft maintenance technicians using standard or extended-reach drill motors and chucks. Ensure the chuck is fully tightened and the shank is fully seated before operation. Always wear appropriate eye protection and secure the workpiece before drilling. Follow applicable industry and workplace safety standards when working on airframe or structural components.