Precision Twist Drill 5998075 Wire 63 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998075 is a jobber-length drill bit in wire gauge size 63, measuring 0.0370 inches in diameter. It is manufactured from high speed steel (HSS) with a bright uncoated finish and features a standard 118-degree split-point angle with web thinning for improved centering and reduced feed pressure. The straight-cylindrical shank and regular spiral flute geometry make this bit compatible with standard drill chucks. At 1.5 inches overall length with a 0.625-inch flute length, this compact bit is suited for precision drilling in tight clearance applications. It is typically installed by machinists, toolroom technicians, and mechanical contractors working on close-tolerance assemblies.

This bit is designed for drilling in steel, cast iron, non-ferrous metals, superalloys, and titanium. It is well suited for light-duty production drilling, maintenance and repair operations, and prototype fabrication where small-diameter precision holes are required. The 17xD flute-to-diameter ratio supports chip evacuation in deeper passes relative to the bit diameter. The tapered web configuration and web-thinned point reduce walking and improve bite at entry, which is particularly useful when drilling harder ferrous materials without a center punch.

Key Features

• Wire gauge size 63 with 0.0370-inch diameter for precision small-hole drilling
• High speed steel construction for use in steel, cast iron, non-ferrous metals, superalloys, and titanium
• 118-degree standard drill point angle with web-thinned, tapered web for improved centering
• Bright uncoated finish; no coolant-through requirement for general-purpose use
• Regular spiral, 2-flute design promotes efficient chip evacuation
• Meets ANSI standards; Series R10H-R18H general purpose designation

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks and drill presses handling wire-gauge tooling. Primary workpiece material codes P, K, N, and S confirm suitability across steel, cast iron, non-ferrous metals, and superalloys including titanium.

Installation Notes

Installation and use should be performed by qualified machinists or mechanical trade professionals following safe machine-tool practices. Secure the straight-cylindrical shank fully in a properly sized drill chuck before operation, and verify chuck runout is within tolerance for small-diameter tooling of this size. Reduce spindle speed and increase feed rate gradually when transitioning to harder workpiece materials such as superalloys or titanium. Inspect the cutting edges for wear before each use, as small-diameter HSS bits are susceptible to breakage if run at excessive speed or with side loading.