Precision Twist Drill 5998514 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998514 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Manufactured from high-speed steel with a coated finish, this bit measures 47/64 inch (0.7344 inches) in diameter and spans 5 inches in overall length. The 118-degree standard point angle and web-thinned, tapered web configuration reduce entry resistance and improve chip evacuation. A right-hand spiral flute with a 2.5xD flute-to-diameter ratio promotes efficient cutting action. This bit is built to ANSI standards and is suited for machinists, fabricators, and maintenance technicians working with titanium and comparable materials.

The 5998514 is a Series R40 screw machine length bit, meaning its shorter overall length provides increased rigidity compared to jobber-length equivalents. This makes it well-suited for drill press work, CNC setups, and close-tolerance operations where runout and deflection must be minimized. The straight-cylindrical shank fits standard 3-jaw chucks and collet systems. It is appropriate for use in machine shops, mechanical contracting environments, and production-line maintenance settings where titanium and high-hardness workpieces are encountered regularly.

Key Features

• 47/64 inch (0.7344 inches) diameter with 118-degree standard point angle for precise entry
• Web-thinned, tapered web reduces thrust load and improves penetration in hard materials
• High-speed steel construction with coated finish for extended tool life
• Screw machine (stub) length provides added rigidity and reduced deflection
• Right-hand spiral flute with 2.5xD flute-to-diameter ratio for efficient chip removal
• Meets ANSI standards; rated for primary workpiece material: titanium

Compatibility

Designed as an OEM-style replacement and general-purpose drill bit for use in standard 3-jaw chucks and collet systems compatible with straight-cylindrical shanks in the 47/64 inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with proper speeds, feeds, and workholding practices. Always secure the workpiece firmly and ensure the chuck or collet is tightened to the manufacturer specification before operation. Wear appropriate PPE including eye protection when drilling. When working with titanium or similarly hard materials, use appropriate cutting fluid to manage heat and extend bit life.