Precision Twist Drill 5998582 9/16 in Hss Screw Machine Drill

Product Description

The PRECISION TWIST DRILL 5998582 is a screw machine length drill bit designed for high-performance metal drilling in professional shop and field environments. Built from high speed steel with a bright, uncoated finish, it measures 9/16 inch (0.5625 inches) in diameter and carries a 118-degree standard point angle. The web-thinned, tapered web configuration reduces entry resistance and improves chip clearance. At 4 inches overall length with a 2.5 inch spiral flute, this bit fits standard drill presses, lathes, and CNC setups where stub-length rigidity is preferred over jobber-length reach. Machinists, tool and die techs, and metalworking professionals are the primary users.

This bit is rated for use on titanium as its primary workpiece material, making it well suited for aerospace component work, precision machining shops, and industrial maintenance applications where difficult-to-machine alloys are encountered. The Series R40 designation identifies it within the PRECISION TWIST DRILL high-performance line. Its straight-cylindrical shank seats in standard three-jaw chucks without adapters, and the regular spiral flute pattern handles a broad range of feed rates. It conforms to ANSI standards for screw machine length drills.

Key Features

• 9/16 inch (0.5625 inches) diameter with a 118-degree standard point angle for general-purpose entry geometry
• Web-thinned, tapered web reduces thrust and improves penetration on hard alloys including titanium
• High speed steel construction provides heat resistance through extended cutting cycles
• Screw machine length body (4 inches overall) delivers added rigidity compared to jobber-length bits
• Spiral flute at 2.5xD flute-to-diameter ratio promotes efficient chip evacuation
• Bright, uncoated finish allows easy visual inspection for wear and re-sharpening
• ANSI-compliant Series R40 — meets dimensional standards for interchangeability

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for standard three-jaw chucks and collet holders accepting a straight-cylindrical shank at 9/16 inch diameter, conforming to ANSI screw machine length specifications.

Installation Notes

Installation is performed by machinists and metalworking technicians. Secure the straight-cylindrical shank fully in a three-jaw chuck or collet before operation, and verify runout before engaging the workpiece. Power down and de-energize the machine spindle before changing bits. Follow applicable ANSI B11 machine tool safety standards and shop-specific PPE requirements when drilling titanium or other hard alloys.