Precision Twist Drill 5999278 Jobber Drill Bit No. 11

Product Description

The PRECISION TWIST DRILL 5999278 is a jobber-length drill bit in wire gauge size No. 11 (0.1910 inches), manufactured from high speed steel with a steam oxide coating. It delivers a 118-degree standard point angle and a right-hand spiral flute configuration suited for general-purpose drilling in production and maintenance environments. The overall length is 3.5 inches with a 2-5/16-inch flute length, providing the reach and chip-clearing capacity typical of jobber-series bits. This bit is sized and finished to ANSI and NAS 907 standards and is installed by machinists, pipefitters, HVAC fabricators, and general trade technicians working with ferrous and non-ferrous base metals.

This drill bit is designed for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It suits both hand-held drill applications and drill press setups in light industrial and field service contexts. The straight cylindrical shank fits standard three-jaw chucks, and the 12xD flute-to-diameter ratio supports adequate chip evacuation at moderate feed rates. The steam oxide finish provides a degree of lubricity and surface hardness that extends tool life in ferrous drilling operations.

Key Features

• Wire gauge No. 11 sizing at 0.1910 inches decimal equivalent
• 118-degree standard point angle with web-thinned, tapered web geometry
• Steam oxide coating for improved lubricity and wear resistance on ferrous materials
• Two-flute right-hand spiral for efficient chip removal
• Straight cylindrical shank compatible with standard drill chucks
• Meets ANSI and NAS 907 specification standards

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck accepting a 0.1910-inch straight cylindrical shank, for use across Series R10A, R15A, and R18A application contexts.

Installation Notes

This bit is installed by machinists, sheet metal workers, pipefitters, and field service technicians using a hand drill or drill press. Power down all equipment and secure the workpiece before bit changes. Use appropriate cutting fluid or lubricant when drilling stainless steel, cast iron, or superalloys to extend tool life and prevent work hardening. Do not exceed the manufacturer-recommended feed rate for the base material being drilled.