Precision Twist Drill 5998539 11/64 in Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998539 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. Ground from high speed steel with a bright uncoated finish, it features a standard 118-degree split-point tip geometry and a regular spiral flute for efficient chip evacuation. The straight cylindrical shank measures 11/64 inches in diameter and seats securely in standard drill chucks. Overall length is 3.25 inches with a flute length of 2.125 inches, giving it a 12xD depth-to-diameter ratio suitable for through-hole and blind drilling in production and maintenance environments.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It is a practical choice for HVAC fabrication, plumbing rough-in, electrical panel work, and general sheet metal or structural drilling tasks. The two-flute spiral configuration and web-thinned tapered web reduce entry force and help maintain hole straightness across a range of workpiece materials. It is sold individually but requires a minimum order of 12 units per the manufacturer's packaging structure.

Key Features

• High speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• 118-degree standard point angle with web-thinned tapered web for reduced thrust and cleaner entry
• Bright uncoated finish — no coating to flake or chip during high-temperature drilling
• Right-hand cut, regular spiral, two-flute design promotes consistent chip clearance
• Straight cylindrical shank fits standard 3-jaw keyed and keyless drill chucks
• ANSI-standard jobber length for compatibility with common drill press and hand drill setups

Compatibility

Designed as a general-purpose jobber-length drill bit in the Series R10P-R15P-R18P for use in standard drill chucks accepting an 11/64-inch straight cylindrical shank. Rated for workpiece material codes P, M, K, N, and S per ISO classification.

Installation Notes

Install in a properly sized drill chuck and verify the shank is fully seated and secured before use. Power down or unplug the drill before bit changes. Use appropriate cutting fluid or lubricant when drilling stainless steel, superalloys, or titanium to extend tool life and reduce heat buildup. Wear eye protection and secure the workpiece to prevent movement during drilling.