Precision Twist Drill 5998012 Jobber Drill Bit 48

Product Description

The PRECISION TWIST DRILL 5998012 is a jobber-length twist drill bit sized to wire gauge 48, equivalent to 0.076 inches in diameter. Built from high speed steel with a bright uncoated finish, it features a standard 118-degree split-point angle and a regular spiral flute configuration with web thinning for improved chip evacuation and reduced thrust during entry. The 2-inch overall length and straight-cylindrical shank make it compatible with standard drill chucks. This bit is suited for general-purpose drilling tasks performed by machinists, maintenance technicians, and fabricators working with precision small-diameter hole requirements.

This drill bit is designed for drilling steel, cast iron, non-ferrous metals, superalloys, and titanium in general-purpose shop and field applications. The right-hand cut and two-flute spiral geometry make it appropriate for use in drill presses, CNC machines, and hand-held power drills where controlled, repeatable hole placement in thin or dense material is required. The 1-inch flute length supports a maximum drilling depth of 1 inch, keeping it well-suited for shallow through-holes and spot drilling in compact workpieces.

Key Features

• Wire gauge size 48, 0.076 inches diameter for precision small-bore drilling
• High speed steel construction handles steel, cast iron, non-ferrous metals, superalloys, and titanium
• 118-degree standard point angle with web thinning reduces entry thrust and walking
• Regular spiral, two-flute design promotes efficient chip clearing
• Bright uncoated finish allows easy visual inspection of wear
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit in the R10H-R18H series, conforming to ANSI standards, suitable for use with standard drill chucks accepting a 0.076-inch straight shank.

Installation Notes

Installation and use should be performed by qualified machinists or technicians familiar with rotating cutting tool safety. Secure the workpiece firmly before drilling and confirm chuck gripping force is adequate for the shank diameter. Do not exceed the recommended drilling depth of 1 inch for this bit length. Periodically clear chips from the flutes during deeper passes to prevent binding and heat buildup.