Precision Twist Drill 6001271 Aircraft Drill Bit 43 Hss

Product Description

The PRECISION TWIST DRILL 6001271 is a wire-gauge aircraft extension drill bit designed for precision hole-making in metalworking and aerospace maintenance applications. Built from high speed steel (HSS) with an oxide finish, this drill bit measures 0.089 inches in diameter (wire size 43) and features a 135-degree split point that self-centers on contact, reducing the need for a center punch on most surfaces. The 1.25-inch spiral flute length and straight-cylindrical shank make it compatible with standard drill chucks and quick-change holders. It is a general-purpose bit suited for right-hand rotation in handheld and drill-press setups. Licensed technicians and maintenance professionals performing aircraft or close-tolerance metalwork rely on this type of bit for accurate, repeatable results.

This drill bit is intended for use in aircraft structural maintenance, precision sheet metal work, and general metal fabrication where tight tolerances and accurate hole placement are required. The Series 501-6 designation identifies it as part of PRECISION TWIST DRILL's standard aircraft extension line, appropriate for professionals working on aluminum, mild steel, and similar materials. The 4xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes. It installs individually and is packaged as a single unit.

Key Features

• Wire size 43 diameter at 0.089 inches for close-tolerance hole applications
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• High speed steel construction with oxide finish for corrosion resistance and lubricity
• Straight-cylindrical shank at 0.089 inches for use in standard drill chucks
• Right-hand cutting direction with two spiral flutes and tapered web configuration
• Meets NAS 907 Type B standards for aircraft drill bit geometry

Compatibility

Designed as an OEM-style replacement and standard-use drill bit for applications requiring NAS 907 Type B wire-gauge aircraft extension drill bits in size 43 (0.089 inches). Fits any standard drill chuck accepting a 0.089-inch straight-cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists, aircraft maintenance technicians, or metalworking professionals. Secure the straight-cylindrical shank firmly in the drill chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Always wear appropriate eye protection and follow applicable safety standards for the work environment. Replace the bit when wear causes deviation from tolerance or when the split point shows visible damage.