Precision Twist Drill 5998883 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998883 is a screw machine length drill bit manufactured from high speed steel with a bright uncoated finish. Designed for right-hand cutting with a standard 118-degree point angle, it produces clean through-holes in a compact stub-length format. The straight cylindrical shank seats securely in standard drill chucks and machine spindles. At 0.11 inches (7/64 inch, wire size 35) in diameter and 1-7/8 inches overall length, this bit is suited for close-quarter drilling where a jobber-length bit would be impractical. The tapered web with web thinning reduces thrust and improves chip evacuation in high-cycle production environments.

This Series R41 screw machine drill bit is rated for high-performance general-purpose drilling with a primary workpiece material designation of titanium, indicating it is built to handle demanding materials as well as common metals, plastics, and composites. The 7/8-inch flute length at a 2.5xD flute-to-diameter ratio supports efficient chip clearing in shallow-to-moderate depth holes. Machinists, tool and die workers, and maintenance technicians will find this bit appropriate for CNC drill press work, turret lathe operations, and bench drilling applications where stub-length control and rigidity are priorities.

Key Features

• Screw machine (stub) length at 1-7/8 inches overall for improved rigidity and reduced deflection
• 118-degree standard point angle with web thinning for reduced entry thrust
• High speed steel construction rated for titanium and other demanding workpiece materials
• Bright uncoated finish compatible with cutting oils and standard coolants
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets ANSI standards for dimensional accuracy and performance

Compatibility

Designed as a direct-fit screw machine length drill bit for use in standard drill press chucks, CNC machining centers, and turret lathes accepting a straight cylindrical shank in the 7/64-inch diameter range. Confirmed drill bit size range covers 0.1000 to 0.1500 decimal inches per Series R41 specifications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trained technicians following shop safety protocols. Secure the shank fully in the chuck before operation and verify runout before drilling into finished workpieces. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve hole quality. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows signs of heat discoloration or edge rollover.