Precision Twist Drill 5999334 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999334 is a screw machine length drill bit engineered for high-performance drilling in demanding trade and industrial applications. Manufactured from high speed steel with a bright/uncoated finish, this bit measures 0.242 inches in diameter and delivers a 118-degree standard point angle for clean, accurate entry. The right-hand spiral flute design promotes efficient chip evacuation, while the web-thinned, tapered web configuration reduces thrust and improves cutting efficiency on tough materials including titanium. It is sold individually and suited for use in drill presses, CNC machines, and hand-held power tools.

This bit is rated for general purpose use with a high-performance designation under ANSI standards, making it appropriate for machinists, maintenance technicians, and fabricators working in light manufacturing, HVAC fabrication shops, or plumbing and mechanical trades where precision hole sizing is required. The Series R42 classification places it within a defined family of screw machine length bits intended for shorter-reach drilling where rigidity and accuracy are priorities over extended reach. The 0.242-inch decimal diameter corresponds to Letter C drill sizing.

Key Features

• 0.242-inch diameter with Letter C designation for precise hole sizing
• 118-degree standard point angle for general purpose entry on a wide range of materials
• High speed steel construction rated for use on titanium and similar work materials
• Web-thinned tapered web reduces cutting thrust and improves penetration efficiency
• Bright/uncoated finish — no coating to flake or delaminate under heat
• ANSI-compliant Series R42 screw machine length for rigid, short-reach drilling

Compatibility

Designed as a direct-fit replacement or standard stock drill bit for use in any chuck accepting a straight cylindrical shank within the 0.2000 to 0.2500-inch drill bit size range, per ANSI specification.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotary cutting tools. Secure the straight cylindrical shank fully in the chuck and confirm concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before operation. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.