Precision Twist Drill 5998617 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998617 is a screw machine length drill bit engineered for high-performance drilling in demanding trade and industrial applications. Manufactured from high speed steel with a coated finish, this bit features a 135-degree split point and web-thinned, tapered web construction for fast penetration and reduced walking on entry. The straight-cylindrical shank seats securely in standard drill chucks. At 0.177 inches in diameter and 2-3/16 inches overall length, it is a compact, stub-length tool designed for use in tight spaces and production drilling environments where rigidity and accuracy are critical.

This drill bit is built for right-hand cutting with a regular spiral flute pattern and a flute-to-diameter ratio of 2.5xD, providing efficient chip evacuation. It is rated for use on titanium as the primary workpiece material, making it well suited for aerospace, mechanical, and industrial applications where hard or tough materials are regularly encountered. Series R41C is a heavy-duty line meeting ANSI and NAS 907 specifications, appropriate for machinists, maintenance technicians, and trade professionals requiring consistent performance in production or field settings.

Key Features

• 135-degree split point reduces thrust and prevents bit walking on hard materials
• Web-thinned, tapered web construction improves cutting efficiency and chip flow
• High speed steel with coated finish extends tool life in abrasive and tough materials
• Screw machine (stub) length provides added rigidity for precision hole location
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets ANSI and NAS 907 specifications for dimensional and performance compliance

Compatibility

Designed for drilling titanium and similarly hard workpiece materials; fits standard drill chucks accepting straight-cylindrical shanks in the 0.177-inch diameter range. Suitable for use in drill presses, CNC machines, and hand-held power drills capable of handling the Series R41C heavy-duty bit profile.

Installation Notes

Secure the straight-cylindrical shank firmly in the drill chuck before operation and verify concentricity to minimize runout. Use cutting fluid or coolant appropriate for the workpiece material to preserve bit life, noting that this bit does not support coolant-through delivery. Follow applicable shop safety standards and machine guarding requirements when operating drill presses or CNC equipment. Inspect the cutting edges for wear or chipping before each use, particularly when drilling titanium or other high-strength alloys.