Precision Twist Drill 6001146 13/32 Inch Hss Extension Drill

Product Description

The PRECISION TWIST DRILL 6001146 is a high speed steel aircraft extension drill bit designed for deep-hole drilling in metal, alloy, and structural materials. Built to Series 500-6 standards and compliant with NAS 907 Type B, this bit features a 135-degree split point that self-centers on contact, eliminating the need for a center punch in most applications. The oxide finish reduces friction and helps resist corrosion during use. At 0.4063 inches (13/32 inch) in diameter with a 3.875-inch flute length and 6-inch overall length, this bit reaches into recessed and extended-depth work areas that standard-length bits cannot access.

This aircraft extension drill is suited for aerospace maintenance, structural fabrication, HVAC duct work, sheet metal, and mechanical assembly applications where standard drill length is insufficient. The extended reach makes it particularly useful when working through flanges, frames, or stacked material layers. It is installed and used by machinists, maintenance technicians, aircraft mechanics, and field tradespeople who require reliable, consistent hole geometry in ferrous and non-ferrous metals.

Key Features

• 135-degree split point self-centers on contact for accurate hole starts without walking
• Web-thinned, tapered web construction reduces thrust force during entry
• 6-inch overall length with 3.875-inch spiral flute for extended-reach drilling
• High speed steel construction for general-purpose metal drilling durability
• Oxide finish reduces friction and provides basic corrosion resistance
• Straight-cylindrical shank fits standard drill chucks without adapters
• Right-hand cutting direction, 2-flute spiral design for efficient chip evacuation

Compatibility

Designed as an OEM-style general-purpose aircraft extension drill compatible with standard drill chucks accepting a 13/32-inch straight-cylindrical shank. Meets NAS 907 Type B dimensional standards.

Installation Notes

This bit is installed by machinists or tradespeople using a standard or heavy-duty drill motor or press with a chuck rated for the shank diameter. Secure the workpiece firmly before drilling and apply cutting fluid when drilling hard metals to extend bit life and maintain hole quality. Inspect the split point for chipping or wear before each use. Follow applicable shop safety and PPE requirements when operating rotary cutting tools.