Precision Twist Drill 6001222 9/32 Inch Hss Extension Drill

Product Description

The PRECISION TWIST DRILL 6001222 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications where a standard-length bit cannot access the work area. Built to Series 500-6 specifications and compliant with NAS 907 Type B standards, this bit features a 135-degree split point that is self-centering, eliminating the need for a center punch on most materials. The oxide finish provides a measure of lubricity and corrosion resistance during service. At 9/32 inch (0.2813 inch) diameter with a 2-15/16 inch flute length and 6 inch overall length, it delivers a 4xD flute-to-diameter ratio suited for extended-reach work in metal fabrication, aerospace maintenance, and structural applications.

This drill bit is used in applications requiring extended reach into confined or deep cavities, including aircraft skin drilling, structural steel work, and equipment maintenance in tight spaces. The straight-cylindrical shank seats in standard 3-jaw chucks without adapters. Right-hand spiral flutes evacuate chips efficiently during through-hole drilling in ferrous and non-ferrous metals. General-purpose tool performance rating makes it appropriate for use with standard drill presses, hand drills, and magnetic-base drills on job sites and in shops.

Key Features

• 135-degree split point is self-centering — reduces walking on flat and curved surfaces without a center punch
• NAS 907 Type B compliant — meets aerospace and aviation maintenance standards
• 6 inch overall length with 2-15/16 inch flute length for extended-reach drilling
• Web-thinned tapered web reduces thrust and improves chip clearance in deeper cuts
• Oxide finish adds surface lubricity and basic corrosion protection
• Straight-cylindrical shank fits standard drill chucks without a reduction sleeve or adapter

Compatibility

Designed as an OEM-style replacement and general-use extension drill bit compatible with standard straight-shank drill chucks accepting a 9/32 inch shank diameter.

Installation Notes

Installation of this drill bit is performed by machinists, aircraft maintenance technicians, and general tradespeople using standard 3-jaw chucks. Ensure the chuck is fully tightened and the workpiece is securely clamped before drilling. Always wear appropriate eye protection and apply cutting fluid when drilling harder metals to extend bit life and maintain hole quality. Inspect the cutting edges for wear or chipping before each use and replace the bit if the split point shows signs of damage.