Precision Twist Drill 6001381 Wire 40 Hss Aircraft Drill

Product Description

The PRECISION TWIST DRILL 6001381 is a high speed steel aircraft extension drill bit designed for deep-reach drilling applications in metal, alloys, and composite materials. Built to wire gauge size 40 (0.098 inches decimal), it features a 135-degree split point for self-centering entry without a center punch, reducing walking on hard or curved surfaces. The spiral flute geometry with a 4xD flute-to-diameter ratio promotes efficient chip evacuation. An oxide finish provides corrosion resistance and reduces friction during cutting. With a 12-inch overall length and straight-cylindrical shank, this bit fits standard drill chucks and is suited for aerospace, sheet metal, and precision fabrication work.

This aircraft extension drill is built for applications requiring extended reach into confined areas or deep through-hole drilling not achievable with standard-length bits. The Series 501-12 designation identifies it as a production-grade tool appropriate for use in aerospace maintenance, aircraft assembly, and precision metal fabrication shops. It cuts right-hand and installs in any standard drill motor or drill press accepting a 0.098-inch straight shank. General purpose tool performance makes it viable for repetitive production drilling in steel and aluminum.

Key Features

• Wire gauge size 40 (0.098 inches decimal) straight-cylindrical shank for standard chuck compatibility
• 135-degree split point with self-centering geometry eliminates need for center punch on flat stock
• 12-inch overall length provides extended reach into confined or deep-hole applications
• High speed steel construction with oxide finish for durability and reduced friction
• Spiral flute with web-thinned, tapered web configuration for improved chip clearance
• Meets NAS 907 Type B standard for aerospace-grade drill bit performance

Compatibility

Designed as a general purpose aircraft extension drill compatible with standard drill chucks and drill motors accepting a 0.098-inch straight-cylindrical shank. Conforms to NAS 907 Type B requirements.

Installation Notes

Installation and use of this drill bit is performed by machinists, aerospace technicians, and sheet metal fabricators. Secure the straight shank firmly in a keyed or keyless chuck before operation. Use appropriate cutting fluid when drilling steel or hard alloys to extend tool life and maintain hole quality. Inspect the drill point for chipping or wear before each use, as a damaged split point will compromise self-centering accuracy.