Precision Twist Drill 6001285 Hss Aircraft Extension Drill Bit

Product Description

The PRECISION TWIST DRILL 6001285 is a high speed steel aircraft extension drill bit engineered for precision drilling in aerospace and general-purpose metalworking applications. Built to Series 501-6 standards, it features a 135-degree split point that is self-centering and web-thinned for reduced thrust and accurate starting without a center punch. The straight-cylindrical shank measures 0.081 inches in diameter, matching the wire size 46 drill diameter. With a 6-inch overall length and a 1.125-inch flute length, this bit reaches into recessed areas that standard-length drills cannot access. An oxide finish provides baseline corrosion resistance during storage and light use.

This drill bit is suited for aircraft assembly, sheet metal work, and structural drilling where extended reach is required. The 135-degree split point geometry and two-flute spiral configuration handle steel, aluminum, and similar metals in right-hand cutting applications. The 4xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes. Licensed HVAC sheet metal fabricators, aviation maintenance technicians, and metalworking tradespeople will find it appropriate for tight-clearance and panel-drilling tasks where a jobber-length bit falls short.

Key Features

• 135-degree split point with web thinning for self-centering starts and reduced feed force
• High speed steel construction rated for general-purpose metal drilling
• 6-inch overall length provides extended reach into recessed or obstructed work areas
• Straight-cylindrical shank at 0.081 inches fits standard drill chucks and extensions
• Right-hand spiral flutes with tapered web configuration for efficient chip clearance
• Oxide finish for corrosion resistance during storage and handling

Compatibility

Designed as an OEM-specification replacement or direct-use drill bit conforming to NAS 907 Type B standards, suitable for use with any drill motor or extension accepting a straight-cylindrical shank of 0.081 inches diameter.

Installation Notes

Installation is performed by machinists, aviation maintenance technicians, or sheet metal tradespeople using a compatible hand drill, drill press, or pneumatic drill motor. Secure the workpiece firmly before drilling and confirm the chuck is properly tightened on the straight-cylindrical shank before applying power. Use appropriate cutting fluid for ferrous materials to extend bit life and maintain hole tolerance. Follow applicable workplace safety standards for personal protective equipment when operating rotary cutting tools.