Precision Twist Drill 5998633 19/64 in Hss Screw Machine Drill

Product Description

The PRECISION TWIST DRILL 5998633 is a screw machine length drill bit designed for high-performance drilling in demanding trade applications. It measures 19/64 inch (0.2969 inches) in diameter with an overall length of 2-3/4 inches and a flute length of 1-9/16 inches. Built from high speed steel (HSS) with a bright, uncoated finish, this bit features a standard 118-degree point angle, a right-hand spiral flute, and a straight-cylindrical shank. The web-thinned, tapered web configuration reduces thrust and improves chip evacuation. This bit is installed by machinists, pipefitters, and maintenance technicians who need a compact, stub-length drill for close-quarters work in drill presses and hand-held equipment.

The Series R40 designation places this bit in PRECISION TWIST DRILL's general purpose, high performance line. The screw machine length format — shorter than a jobber bit — provides greater rigidity and reduced deflection, making it well suited for precision hole location in metals including titanium, as specified by the manufacturer. The 2.5xD flute-to-diameter ratio supports efficient chip clearing in moderate-depth holes. This bit conforms to ANSI standards and is sold individually.

Key Features

• 19/64 inch (0.2969 inches) diameter, Series R40 screw machine length
• High speed steel construction with bright, uncoated finish for general purpose cutting
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Right-hand cut, regular spiral flute for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks
• Stub-length body (2-3/4 inches overall) provides added rigidity and reduced deflection vs. jobber length
• Conforms to ANSI standards

Compatibility

Designed as a general purpose screw machine length drill bit for use with standard 3-jaw drill chucks on bench drill presses, drill motors, and CNC equipment. Primary workpiece material specified by the manufacturer is titanium; also suitable for general metal drilling applications consistent with HSS tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with cutting tool speeds and feeds. Always secure the workpiece and confirm the chuck is properly tightened before operation. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged. Follow applicable shop safety procedures and machine-specific operating guidelines when selecting spindle speed and feed rate.