Precision Twist Drill 6001322 Letter R Hss Aircraft Drill

Product Description

The PRECISION TWIST DRILL 6001322 is a Letter R aircraft extension drill bit built for deep-reach drilling applications in metal fabrication and aerospace maintenance work. Manufactured from high speed steel with an oxide finish, this drill delivers reliable cutting performance in ferrous and non-ferrous metals. The 135-degree split point is self-centering, eliminating the need for a center punch and reducing walking on hard or curved surfaces. The bit measures 0.339 inches in diameter with a 3.4375-inch flute length and 6-inch overall length, giving technicians extended reach in confined or deep-stack assemblies. Licensed HVAC, aviation, and general mechanical trades rely on this geometry for precision metalwork.

This drill bit is suited for through-hole and clearance drilling in sheet metal, structural plate, and multi-layer assemblies. The Series 502-6 aircraft extension design provides additional length for accessing recessed locations that standard-length bits cannot reach. The right-hand spiral flute configuration efficiently clears chips during drilling. The tapered web with web thinning reduces thrust requirements, making it effective in hand-held and drill-press setups alike. It is appropriate for general-purpose production and maintenance applications where consistent hole quality in Letter R diameter is required.

Key Features

• 135-degree split point is self-centering for accurate hole starts without a center punch
• High speed steel construction provides durability across a range of metals
• Oxide finish reduces friction and provides light corrosion protection during storage
• 6-inch overall length with 3.4375-inch flute length for extended-reach drilling
• Tapered web with web thinning lowers drilling thrust and reduces heat buildup
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose aircraft extension drill bit conforming to NAS 907 Type B standards, suitable for use in standard three-jaw drill chucks and compatible drilling equipment accepting a 0.339-inch straight-cylindrical shank.

Installation Notes

This bit is installed by qualified machinists, aviation maintenance technicians, and mechanical tradespeople using standard drill chucks or drill presses. Secure the workpiece before drilling and verify chuck tightness to prevent bit slippage during operation. Use appropriate cutting fluid for the material being drilled to extend bit life and improve hole finish. Wear appropriate eye and hand protection in compliance with applicable shop safety standards.