Precision Twist Drill 5999264 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999264 is a screw machine length drill bit engineered for high-performance drilling in tight-clearance applications. Built from high speed steel (HSS) with a bright, uncoated finish, this bit features a 118-degree standard point angle and a right-hand spiral flute for efficient chip evacuation. The straight-cylindrical shank seats securely in standard drill chucks and screw machine spindles. At 0.067 inches in diameter with an overall length of 1-11/16 inches and a flute length of 11/16 inches, it is optimized for close-tolerance work in short-reach drilling setups. The web-thinned, tapered web design reduces entry force and improves point centering on entry.

This bit is suited for use in screw machines, drill presses, and hand drills where a compact, stub-length tool is required. The Series R41 designation identifies it as a general-purpose HSS bit following ANSI standards. The primary workpiece material designation includes titanium, though the general-purpose grade also performs well across a range of metals and materials common in production and maintenance drilling environments. It is typically used by machinists, maintenance technicians, and trade professionals requiring consistent performance in repetitive drilling operations at small diameters.

Key Features

• 0.067 inch diameter, Wire Size 51, for precision small-bore drilling
• High speed steel construction with bright, uncoated finish for general-purpose use
• 118-degree standard point angle with web-thinned, tapered web for reduced entry force
• Right-hand cut, regular spiral flute for efficient chip removal
• Screw machine (stub) length at 1-11/16 inches overall for short-reach and close-tolerance applications
• ANSI-compliant Series R41 with 2.5xD flute-to-diameter ratio

Compatibility

Designed as an OEM-style screw machine length drill bit compatible with standard straight-shank drill chucks and screw machine spindles accepting 0.067 inch diameter tooling.

Installation Notes

Install into a properly sized drill chuck or collet, ensuring the shank is fully seated and the chuck is tightened securely before operation. Power down or de-energize the machine before changing bits. Use appropriate speeds and feeds for the workpiece material to avoid premature wear or bit breakage at this small diameter. Dispose of worn bits properly — a dull bit at this size can deflect or snap under feed pressure.