Precision Twist Drill 5998653 1/2 in Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998653 is a jobber-length drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a steam oxide coating, it measures 1/2 inch in diameter and 6 inches overall length, with a 4.5-inch spiral flute and a straight-cylindrical shank. The 118-degree standard point angle is the industry-standard geometry for metal drilling, and the web-thinned, tapered web construction reduces thrust force at the tip. Right-hand cut with two regular spiral flutes, this bit is suited for production and maintenance drilling in trade and industrial settings.

This drill bit is intended for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It fits standard drill chucks accepting a 1/2-inch straight-cylindrical shank. The Series R10 designation places it in PRECISION TWIST DRILL's general-purpose jobber-length line, appropriate for machine shop use, maintenance work, and field drilling by electricians, pipefitters, millwrights, and other trades requiring consistent hole quality in metal substrates.

Key Features

• High speed steel construction with steam oxide coating for corrosion resistance and lubricity
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• 4.5-inch maximum drilling depth with regular spiral flutes for efficient chip evacuation
• Right-hand cut, two-flute design compatible with standard drill presses and hand drills
• Straight-cylindrical shank fits standard 1/2-inch drill chucks without an adapter
• ANSI-compliant construction for consistent dimensional tolerances

Compatibility

Designed as a general-purpose OEM-style jobber-length drill bit for use in any drill press, magnetic drill, or hand drill accepting a 1/2-inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using a drill press, magnetic drill, or portable hand drill with a compatible chuck. Secure the workpiece before drilling and apply cutting fluid when working with stainless steel, superalloys, or titanium to extend bit life and maintain point geometry. Inspect the cutting edges before each use and replace if chipping or excessive wear is observed. Follow applicable ANSI and shop-safety standards for speed and feed selection appropriate to the workpiece material.