Precision Twist Drill 5998300 Jobber Drill Bit 33/64 in Hss

Product Description

The PRECISION TWIST DRILL 5998300 is a jobber-length drill bit designed for general-purpose drilling in a wide range of materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it measures 33/64 inch (0.5156 inch) in diameter with an overall length of 6.625 inches. The 118-degree standard point angle provides a balanced combination of cutting aggression and point stability across common shop and field applications. A tapered web with web-thinning reduces thrust and improves chip clearing. Licensed tradespeople and maintenance mechanics reach for this bit when drilling through steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials.

This bit fits standard jobber-length applications in metal fabrication, mechanical contracting, and industrial maintenance. The straight-cylindrical shank seats securely in 3-jaw drill chucks on both benchtop drill presses and handheld power drills. With a flute length of 4.8125 inches, it supports a maximum drilling depth of 4.8125 inches, making it suitable for through-hole and deep-hole work in typical structural and mechanical stock. It belongs to the Series R10P-R15P-R18P family and conforms to ANSI standards.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous workpieces
• 118-degree standard point angle for general-purpose drilling stability
• Web-thinned tapered web reduces cutting thrust and improves chip evacuation
• Two-flute regular spiral design promotes efficient chip clearing
• Straight-cylindrical shank fits standard 3-jaw chucks without adapters
• Conforms to ANSI specification for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck accepting a 33/64-inch (0.5156-inch) straight-cylindrical shank. Rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces per Series R10P-R15P-R18P application guidelines.

Installation Notes

Installation is performed by machinists, maintenance mechanics, or qualified tradespeople using a drill press or handheld power drill with an appropriate chuck. Secure the shank fully in the chuck and verify concentricity before beginning a cut. Always wear eye protection and secure the workpiece before drilling. Use appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat and extend bit life.