Precision Twist Drill 5998927 0.272 in Hss Drill Bit

Product Description

The PRECISION TWIST DRILL 5998927 is a screw machine length drill bit designed for high-performance drilling in metalworking applications. It measures 0.272 inches in diameter with an overall length of 2-11/16 inches and a flute length of 1-1/2 inches. The bit is manufactured from high speed steel (HSS) with a bright/uncoated finish, offering a 118-degree standard point angle and a right-hand spiral flute. The straight-cylindrical shank seats securely in standard drill chucks. This is a Series R42 bit with a web-thinned, tapered web configuration for reduced thrust and cleaner entry, suited for machinists and fabricators working in production or repair environments.

This drill bit is rated for use in screw machine and general-purpose drilling operations. Its 0.272-inch diameter corresponds to Letter size I. The 2.5xD flute-to-diameter ratio and web-thinned geometry make it particularly effective when drilling titanium and other demanding workpiece materials. It is appropriate for use in drill presses, CNC machining centers, and hand-held power drills in both shop and field settings. The screw machine length provides added rigidity compared to jobber-length bits, reducing deflection in close-tolerance work.

Key Features

• 0.272 inch (Letter I) diameter with 118-degree standard point angle
• High speed steel construction with bright/uncoated finish for general-purpose use
• Web-thinned, tapered web reduces drilling thrust and improves chip evacuation
• Screw machine length body (2-11/16 inches overall) increases rigidity and reduces deflection
• Right-hand spiral flute for standard clockwise drilling operations
• Rated for titanium as primary workpiece material per Series R42 specification
• Meets ANSI standards for dimensional and performance compliance

Compatibility

Designed as an OEM-style replacement and standard fitment for screw machine length drill bit applications requiring a 0.272 inch straight-cylindrical shank bit compatible with standard drill chucks and collet holders.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with drill press and rotary tool operation. Ensure the machine spindle is fully stopped and the chuck is secured before inserting or removing the bit. Use appropriate cutting fluid or coolant when drilling titanium or hard alloys to extend tool life and maintain dimensional accuracy. Inspect the cutting edges for wear or chipping before each use and replace if the point is damaged.