Precision Twist Drill 5995470 Jobber Drill Bit 15/64

Product Description

The PRECISION TWIST DRILL 5995470 is a jobber-length twist drill bit designed for general-purpose drilling in steel, cast iron, and similar ferrous and non-ferrous workpiece materials. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, this bit features a 118-degree standard point angle with web thinning for improved chip clearance and reduced thrust at entry. It is sized at 15/64 inches (0.2344 inches) in diameter with a straight shank of the same diameter. The left-hand cutting direction makes it well-suited for extracting broken fasteners and reverse-drilling applications. Machinists, maintenance technicians, and trade professionals working with drill presses or hand drills will find this a reliable general-purpose option.

This drill bit is intended for use on steel and cast iron workpieces in general-purpose machining and fabrication environments. Its jobber-length profile offers a practical balance between reach and rigidity for common drilling tasks. The 2-flute regular spiral flute geometry promotes efficient chip evacuation during through-hole and blind-hole drilling. The Series L10 designation places it within a standardized line of jobber-length HSS drill bits conforming to ANSI specifications, making it appropriate for use in both shop and field maintenance settings.

Key Features

• Left-hand cut direction for reverse-rotation drilling and broken fastener extraction
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• HSS construction with bright, uncoated finish suitable for general-purpose ferrous and non-ferrous materials
• Regular spiral, 2-flute geometry for efficient chip removal
• Straight shank at 0.2344 inches for compatibility with standard drill chucks
• Conforms to ANSI standards under Series L10

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks accepting a 15/64-inch straight shank. Primary workpiece materials include steel and cast iron.

Installation Notes

This drill bit is installed by trade machinists and maintenance technicians in drill presses, lathes, or hand drills with a compatible chuck. Before use, ensure the workpiece is securely clamped and the machine is powered down while loading or changing bits. Because this is a left-hand cut bit, it must be used with a spindle rotating in reverse (counterclockwise) direction. Apply appropriate cutting fluid when drilling ferrous materials to extend tool life and maintain dimensional accuracy.