Precision Twist Drill 5998425 Jobber Drill Bit 19/64 Hss

Product Description

The PRECISION TWIST DRILL 5998425 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. Built from high speed steel with a bright uncoated finish, it features a standard 118-degree split point and a two-flute regular spiral configuration. The straight cylindrical shank measures 19/64 inches in diameter and seats securely in standard drill chucks. At 4.375 inches overall length with a 3.0625-inch flute length, this bit delivers the reach needed for typical through-hole and blind-hole work in production and maintenance applications. Web thinning reduces entry resistance and helps maintain point accuracy under load.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It fits right-hand drill presses, hand drills, and CNC drilling setups in light manufacturing, HVAC fabrication, plumbing rough-in, and general mechanical trade work. The R10P series designation places it in a jobber-length family rated for a flute-to-diameter ratio of 10xD, making it appropriate for controlled-depth drilling where rigidity matters.

Key Features

• 19/64 inch (0.2969 inch) diameter, ANSI-standard jobber length
• 118-degree standard point angle with web thinning for easier penetration
• High speed steel construction handles steel, cast iron, stainless, and titanium
• Bright uncoated finish — no coating to chip or delaminate during regrinding
• Regular spiral, two-flute design promotes efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any right-hand drill press, hand drill, or CNC spindle accepting a straight cylindrical shank of 19/64 inch diameter. Suitable for workpiece materials coded P, M, K, N, and S under standard material classification.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using standard drill chucks or collet holders. Secure the shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid or coolant when drilling stainless steel, titanium, or other work-hardening alloys to extend tool life. Inspect the point for wear or chipping before each use and regrind or replace as needed to maintain hole quality.