Precision Twist Drill 5999268 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999268 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 bright, uncoated finish, it features a 118-degree standard point angle and a right-hand spiral flute for efficient chip evacuation. The straight-cylindrical shank measures 0.0635 inches in diameter, and the overall length is 1-11/16 inches with an 11/16-inch flute length. This Series R41 bit includes web thinning for reduced thrust at entry and a tapered web configuration for added strength along the flute.

This drill bit is suited for use in screw machine operations, production drilling, and precision hole-making tasks where a compact, stub-length tool is required. The 2.5xD flute-to-diameter ratio and high performance rating make it appropriate for drilling titanium and other demanding workpiece materials. It is sold individually but requires a minimum order of 12 units per order. Licensed machinists, tool and die makers, and trade professionals working with tight tolerances and hard materials will find this bit fits standard drill chucks and collet holders without modification.

Key Features

• 0.0635-inch diameter matches Wire Gauge size 52 for precise hole sizing
• 118-degree standard point angle suits a wide range of ferrous and non-ferrous materials
• Web-thinned, tapered web reduces entry thrust and improves chip flow
• Screw machine (stub) length improves rigidity and reduces deflection in short-reach applications
• Right-hand spiral flute provides consistent chip evacuation during through-hole drilling
• ANSI-compliant construction meets standard dimensional tolerances

Compatibility

Designed as an OEM-style replacement and standard-stock screw machine drill bit compatible with any drill press, CNC machining center, or hand drill equipped with a standard straight-shank chuck sized to accept a 0.0635-inch diameter shank.

Installation Notes

Installation of this drill bit is performed by machinists or trade professionals familiar with rotary cutting tools. Secure the straight-cylindrical shank firmly in the chuck or collet before operation and verify runout before beginning a cut. Always follow applicable ANSI safety standards and machine tool manufacturer guidelines when mounting or replacing drill bits. Ensure the machine spindle is fully stopped and powered down before changing tooling.