Precision Twist Drill 5998287 3/8 in Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998287 is a jobber-length drill bit designed for general-purpose metal drilling in trade and industrial applications. Manufactured from high-speed steel with a bright uncoated finish, it features a 118-degree standard point angle and a two-flute regular spiral configuration with web thinning for improved penetration. The bit measures 3/8 inches in diameter with an overall length of 5 inches and a flute length of 3.625 inches, providing a maximum drilling depth of 3.625 inches. The straight-cylindrical shank matches the 3/8-inch body diameter, making it compatible with standard drill chucks across bench, floor, and hand-held drill equipment.

This bit is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It falls within the Series R10P-R15P-R18P and conforms to ANSI standards, making it appropriate for professional machinists, pipefitters, ironworkers, and HVAC and electrical tradespeople who routinely drill through structural and sheet metal in both shop and field settings.

Key Features

• High-speed steel construction for durability in ferrous and non-ferrous metal drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust on entry
• Bright uncoated finish suitable for general-purpose applications without coolant through
• Two-flute regular spiral geometry promotes efficient chip evacuation
• 3.625-inch flute length provides maximum drilling depth in jobber-length format
• Straight-cylindrical shank fits standard three-jaw drill chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit for use with standard drill chucks accepting a 3/8-inch straight-cylindrical shank, conforming to ANSI specification and suitable for bench drills, drill presses, and hand-held power drills used in metal fabrication and trade work.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with drilling equipment and machine safety practices. Secure the workpiece firmly before drilling and ensure the drill chuck is fully tightened on the shank before operation. Disengage power and allow the bit to come to a complete stop before changing bits or adjusting workpiece position. This bit is not designed for coolant-through delivery; use external cutting fluid when drilling hard materials to extend bit life and maintain dimensional accuracy.