Precision Twist Drill 5999277 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999277 is a screw machine length drill bit designed for high-performance drilling in tight, close-tolerance applications. Built from high speed steel with a bright uncoated finish, this bit features a 118-degree standard point angle and a right-hand spiral flute for clean, consistent chip evacuation. At 0.0595 inches in diameter, it corresponds to wire gauge size 53. The short screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection during use. Licensed machinists, maintenance technicians, and trade professionals working in metal fabrication or mechanical assembly are the primary users.

This drill bit is suited for drilling into metals including titanium, as indicated by its high-performance tool designation under the R41 series. The screw machine length format is commonly used in drill press, CNC, and turret lathe applications where stub-length rigidity is required. The 2.5xD flute-to-diameter ratio supports efficient chip removal in deeper passes. It meets ANSI standards and is appropriate for general-purpose and high-performance production drilling environments where precision at small diameters is critical.

Key Features

• Wire gauge size 53 diameter of 0.0595 inches for precise small-hole work
• High speed steel construction rated for titanium and other demanding workpiece materials
• 118-degree standard point angle with web-thinned, tapered web configuration
• Screw machine (stub) length for increased rigidity and reduced deflection
• Right-hand cut with regular spiral flute for consistent chip evacuation
• Meets ANSI standards under Series R41

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for use in drill presses, CNC machining centers, and turret lathes requiring a straight-cylindrical shank bit in wire gauge size 53.

Installation Notes

This bit is installed by machinists and maintenance technicians using standard drill chucks or collet systems compatible with straight-cylindrical shanks. Ensure the machine is fully powered down and the chuck is secure before seating the bit. At this diameter, use appropriate low feed pressure to avoid tip breakage. Follow shop safety standards and machine manufacturer guidelines for small-diameter bit operation.