Precision Twist Drill 5998532 Screw Machine Drill Bit 5/64

Product Description

The PRECISION TWIST DRILL 5998532 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel (HSS) with a bright/uncoated finish, it carries a 118-degree standard point angle and a right-hand spiral flute configuration. At 5/64 inch (0.0781 inches) in diameter with an overall length of 1-11/16 inches and a flute length of 11/16 inches, this bit fits compact drilling tasks where stub-length control matters. The tapered web with web thinning reduces thrust and improves chip evacuation in tight setups.

This bit is suited for use in screw machine operations, drill press work, and handheld power tool applications where a shorter bit length provides added rigidity and accuracy. The Series R40 designation places it in a general-purpose HSS line intended for cutting ferrous and non-ferrous metals, plastics, and composites. Per the supplier attribute data, the primary workpiece material designation is titanium, indicating the HSS formulation and point geometry are capable of handling harder materials. Machinists, pipefitters, HVAC fabricators, and electricians commonly use screw machine bits for close-tolerance hole drilling in sheet metal, structural components, and enclosures.

Key Features

• 5/64 inch (0.0781 inches) diameter with screw machine stub length for increased rigidity
• 118-degree standard point angle for general-purpose drilling accuracy
• High speed steel construction with bright/uncoated finish
• Right-hand cut, regular spiral flute for efficient chip removal
• Web-thinned tapered web reduces cutting resistance and thrust load
• Meets ANSI standards; Series R40 general-purpose grade

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard straight-shank drill chucks on drill presses, screw machines, and handheld power drills. No specific OEM system compatibility is listed in the product data.

Installation Notes

Install in a properly sized straight-shank chuck and verify chuck tightness before operation. Use appropriate cutting fluid or coolant when drilling harder materials to preserve edge life, noting that this bit does not support coolant-through delivery. Follow applicable ANSI and shop safety standards for rotating tool operation, including securing the workpiece before drilling. Inspect the cutting edge for wear before each use and replace when point geometry is compromised.