Precision Twist Drill 5998569 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998569 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel with a coated finish, this bit features a 135-degree split point for fast, self-centering starts with reduced thrust. The web-thinned, tapered web construction minimizes walking and improves chip evacuation. At 0.1065 inches in diameter with an overall length of 1-13/16 inches and a flute length of 13/16 inches, the compact screw machine length profile is well suited for close-quarters drilling and machine tool work. Right-hand spiral fluting paired with a straight cylindrical shank ensures broad compatibility with standard chucks and drill presses.

This bit is rated for use on titanium as its primary workpiece material, making it a strong choice for aerospace, toolroom, and precision machining environments where difficult materials are standard. The heavy-duty grade and high-performance classification reflect the Series R41C design, which is built to handle elevated feed rates and tighter tolerances. Machinists, tool and die workers, and maintenance technicians working with hard metals and tight clearances will find this bit fits production and repair drilling operations. The 2.5xD flute-to-diameter ratio supports efficient chip removal in short-depth hole applications.

Key Features

• 135-degree split point reduces walking and lowers required thrust for faster starts
• Web-thinned tapered web improves chip flow and reduces heat buildup
• High speed steel construction with coated finish for extended tool life
• Screw machine length profile suits confined spaces and gang drilling fixtures
• Right-hand spiral flute with straight cylindrical shank fits standard drill chucks
• Meets ANSI and NAS 907 standards for dimensional and performance consistency

Compatibility

Designed for use with standard straight-shank drill chucks on drill presses, CNC machining centers, and hand-held power tools. Rated for titanium as the primary workpiece material per Series R41C specifications. Wire size designation is number 36.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with proper speeds and feeds for high speed steel tooling in hard materials. Secure the straight cylindrical shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid or coolant at the point of contact when drilling titanium or similar hard metals to manage heat. Inspect the cutting edges for wear or chipping before each use and replace when sharpness is compromised to avoid workpiece damage or tool breakage.