Precision Twist Drill 5999814 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999814 is a high-speed steel extra-length drill bit designed for deep-hole drilling in metalworking and industrial applications. Measuring 0.5 inches in diameter with a 15-inch overall length and an 11-inch spiral flute, this bit reaches depths that standard-length drills cannot. The 118-degree standard point angle and web-thinned tip reduce thrust and improve chip evacuation at the start of the cut. A straight-cylindrical shank with a 0.5-inch diameter seats securely in standard drill chucks. This is a right-hand cutting, general-purpose bit suited for machinists, maintenance technicians, and fabrication professionals.

This bit is built for production and job-site use where extended reach is required, such as drilling through thick plate, structural steel, pipe flanges, or deep cross-sections. The Series 1511 designation identifies it as an ANSI-standard extra-length series. Primary workpiece materials include aluminum, magnesium, copper, nickel, synthetic composites, and titanium. Secondary applications cover stainless steel, hardened steel, nickel alloys, malleable iron, high-strength bronze, magnesium alloys, and reinforced plastics. Uncoated HSS construction keeps regrinding straightforward when the cutting edge wears.

Key Features

• 0.5-inch diameter with 15-inch overall length for deep-reach drilling
• 11-inch spiral flute length promotes continuous chip removal in deep holes
• 118-degree standard point angle with web-thinned tip reduces entry thrust
• Two-flute regular spiral geometry maintains straightness over extended depth
• Uncoated high-speed steel construction allows easy resharpening in the field
• ANSI-standard Series 1511 straight-cylindrical shank fits standard chucks

Compatibility

Designed as an ANSI-standard general-purpose extra-length drill bit compatible with any drill press, magnetic drill, or milling machine spindle accepting a straight 0.5-inch shank. Suitable for primary workpiece materials including aluminum, magnesium, copper, nickel, synthetic composites, and titanium, with secondary suitability for stainless steel, hardened steel, nickel alloys, malleable iron, high-strength bronze, and reinforced plastics.

Installation Notes

Secure the straight-cylindrical shank fully in a drill chuck or collet before operation, and verify chuck runout is within acceptable tolerances to prevent premature bit deflection on long-reach cuts. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life and improve chip flow. Reduce feed pressure at breakthrough to avoid workpiece damage and bit breakage. Follow shop safety protocols including eye protection and secure workpiece fixturing when operating drill presses or magnetic drills.