Precision Twist Drill 5999338 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999338 is a screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. Built from high speed steel with a coated finish, this bit features a 135-degree split point and web-thinned, tapered web construction that reduces walking and improves penetration. At 15/64 inch (0.2340 inches) in diameter and 2-7/16 inches overall length, it is sized for compact, close-tolerance work. The right-hand spiral flute geometry promotes efficient chip evacuation. Licensed trades and machining professionals specify this bit for applications where accuracy and tool life under load are required.

The 5999338 is rated for primary use on titanium workpieces, making it a strong choice for aerospace component work, structural fabrication, and precision machining environments. The screw machine length format provides added rigidity compared to jobber-length bits, which benefits drilling in drill presses, CNC setups, and turret lathes where runout must be minimized. The R42C series designation indicates compliance with ANSI and NAS 907 standards, confirming dimensional consistency for production use. Machinists and toolroom technicians working with non-ferrous metals and titanium alloys will find this bit suited to their workflow.

Key Features

• 15/64 inch (0.2340 inches) diameter with screw machine length for rigid, close-tolerance drilling
• 135-degree split point reduces thrust force and eliminates center-punch requirement on many materials
• Web-thinned, tapered web construction improves chip flow and cutting efficiency
• High speed steel construction with coated finish for extended tool life on titanium and similar materials
• Right-hand cut with regular spiral flute for consistent chip evacuation
• Meets ANSI and NAS 907 standards for dimensional accuracy in production environments

Compatibility

Designed as a high-performance screw machine length drill bit for use on titanium as the primary workpiece material, within the 0.2000 to 0.2500 inch drill bit size range. Compliant with ANSI and NAS 907 specifications for use in precision production drilling applications.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool setup and safe machine operation. Secure the straight-cylindrical shank fully in the drill chuck or collet before operation, and verify runout before cutting. Coolant through is not supported on this bit, so apply cutting fluid externally when drilling titanium to manage heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.