Precision Twist Drill 5998444 Drill Bit Wire 80

Product Description

The PRECISION TWIST DRILL 5998444 is a jobber-length drill bit sized at wire gauge 80 (0.0135 inches decimal), designed for precision drilling in metal fabrication, tooling, and machining applications. Built from high speed steel with a bright uncoated finish, it features a 118-degree standard point angle and a two-flute spiral configuration for clean, efficient chip evacuation. The straight-cylindrical shank measures 0.0135 inches in diameter with a shank length of 0.625 inches. Overall length is 0.75 inches. This bit is intended for use by machinists, tool and die technicians, and skilled trade professionals requiring consistent small-diameter hole quality.

The 5998444 is suited for drilling in steel, cast iron, non-ferrous metals, superalloys, and titanium. It is a general-purpose tool appropriate for production drilling, fixture work, and precision hole placement in both shop and field environments. The maximum drilling depth is 0.125 inches, consistent with the jobber-length flute dimension of 0.125 inches. The regular spiral type and tapered web configuration with web thinning support controlled entry and reduced thrust at this small diameter. Series designation is R10H-R18H.

Key Features

• Wire gauge size 80 — 0.0135 inches decimal diameter for precision small-hole drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction suitable for steel, cast iron, non-ferrous metals, superalloys, and titanium
• Right-hand cut, two-flute regular spiral for efficient chip removal
• Straight-cylindrical shank for compatibility with standard drill chucks and collets
• ANSI specification compliant, general-purpose grade

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks and collets accepting a 0.0135-inch straight-cylindrical shank. Suitable for CNC machining centers, drill presses, and hand-held power tools where wire-gauge small-diameter bits are required.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with small-diameter tooling. Secure the shank firmly in a precision chuck or collet before operation and verify runout is within acceptable tolerance to prevent bit deflection or breakage at this diameter. Apply appropriate cutting fluid or lubricant when drilling ferrous materials to extend tool life. Follow applicable shop safety standards and machine guarding requirements during use.