Precision Twist Drill 5998328 5/8 Inch Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5998328 is a jobber-length drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a bright uncoated finish, it measures 5/8 inch (0.6250 inch) in diameter with a 118-degree standard point angle and a web-thinned, tapered web configuration for easier penetration and reduced walking on entry. The straight-cylindrical shank and two-flute spiral design provide consistent chip evacuation during through-hole and blind-hole drilling operations. Licensed tradespeople and maintenance machinists reach for this bit when working through steel, cast iron, stainless steel, non-ferrous metals, and other hard materials.

This bit fits standard drilling applications across industrial, commercial, and field-service environments. With an overall length of 7.125 inches and a flute length of 5.1875 inches, it handles drilling depths up to 5-3/16 inches, making it suitable for structural steel fabrication, mechanical assembly, and maintenance repair work. It belongs to the Series R10P-R15P-R18P family and conforms to ANSI standards. The right-hand cut geometry is compatible with conventional drill press and handheld power drill operation.

Key Features

• High speed steel construction for durability across steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force and improved centering
• Two-flute regular spiral design promotes efficient chip clearance during drilling
• Straight-cylindrical shank (0.6250 inch diameter) seats securely in standard keyed or keyless chucks
• 7.125-inch overall length with 5.1875-inch maximum drilling depth suits most jobber-length applications
• Bright uncoated finish maintains dimensional accuracy and simplifies regrinding

Compatibility

Designed as a general-purpose jobber-length drill bit conforming to ANSI standards, suitable for use in standard 5/8-inch capacity drill chucks on drill presses, magnetic drills, and handheld power drills.

Installation Notes

Installation should be performed by a qualified machinist or tradesperson familiar with rotary cutting tool safety. Secure the shank fully in the chuck and verify runout before beginning the cut. Always wear appropriate eye protection and secure the workpiece before drilling. Consult applicable ANSI and facility safety standards for speeds, feeds, and coolant requirements based on workpiece material.