Precision Twist Drill 5998219 Jobber Drill Bit 18 Hss

Product Description

The PRECISION TWIST DRILL 5998219 is a jobber-length drill bit sized at wire gauge 18 (0.1695 inches decimal), manufactured from high speed steel with a bright, uncoated finish. It features a standard 118-degree split-point geometry and a regular spiral flute configuration with web thinning for improved chip evacuation and reduced thrust when entering the cut. The straight cylindrical shank measures 0.1695 inches in diameter and 1.125 inches in length. Overall length is 3.25 inches with a 2.125-inch flute length, providing a 13xD depth-to-diameter ratio. This is a general-purpose drill intended for use by machinists, tool and die tradespeople, and maintenance technicians working in metal fabrication and industrial service environments.

The 5998219 is designed for drilling into steel, cast iron, non-ferrous metals, superalloys, and titanium. Its general-purpose grade and ANSI-standard geometry make it a standard stock item for drill presses, CNC machining centers, and hand-held power tools in both shop and field maintenance applications. The right-hand cut spiral flute suits conventional drilling setups without coolant-through capability. Typical uses include hole origination and through-hole drilling in sheet metal, structural components, and machined parts where wire-gauge sizing is specified.

Key Features

• Wire gauge size 18 at 0.1695 inches decimal diameter for precision hole sizing
• High speed steel construction provides hardness and heat resistance across a range of metal workpieces
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• Regular right-hand spiral flute promotes efficient chip removal during through-hole and blind-hole drilling
• Bright uncoated finish allows easy visual inspection for wear and re-sharpening
• ANSI-standard geometry ensures dimensional compatibility with standard drill chucks and holders

Compatibility

Designed as an OEM-style jobber-length drill bit in the R10H-R18H series, suitable for standard 3-jaw drill chucks and collet systems accepting a 0.1695-inch straight cylindrical shank. Compatible with steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces as identified by material codes P, K, N, and S.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools. Secure the shank fully in the chuck and verify runout before beginning the cut. Always power down and de-energize the machine spindle before changing bits. Do not exceed the recommended maximum drilling depth of 2.125 inches for this bit size, and apply appropriate cutting fluid when drilling harder alloys to extend tool life.