Precision Twist Drill 5999704 Taper Length Drill Bit 15/64

Product Description

The PRECISION TWIST DRILL 5999704 is a taper length drill bit designed for general-purpose drilling in a wide range of metallic and non-metallic materials. Built from high speed steel with a bright/uncoated finish, this bit measures 15/64 inch (0.2344 inches) in diameter and delivers a 118-degree standard point angle suited for most shop and field drilling operations. The spiral flute geometry with a 6xD flute-to-diameter ratio promotes efficient chip evacuation during extended cuts. A straight shank provides straightforward chuck compatibility without adapters. Licensed tradespeople and machinists reach for this bit when working through carbon steel, stainless, aluminum, cast iron, and similar substrates.

The 5999704 belongs to the Series R51 line of taper length bits, which offer greater reach than jobber-length bits while maintaining rigidity. The extended flute length of 3-3/4 inches and overall length of 6-1/8 inches make it well-suited for applications requiring deeper hole penetration than a standard jobber bit allows. Typical installations include fabrication shops, HVAC equipment manufacturing, plumbing rough-in work, and general mechanical trades where drilling through structural members or stacked material is common.

Key Features

• 15/64 inch (0.2344 inches) diameter with matching straight shank for direct chuck mounting
• 118-degree standard point angle with web-thinned, tapered web configuration for reduced thrust
• 3-3/4 inch spiral flute length with 6xD ratio for efficient chip removal in deep holes
• High speed steel construction handles alloy steel, stainless steel, cast iron, aluminum, brass, bronze, copper, and more
• Bright/uncoated finish — no coating buildup to affect final hole diameter
• Right-hand cut, ANSI-standard geometry for compatibility with standard drill presses and hand drills

Compatibility

Designed as a general-purpose taper length drill bit compatible with any standard drill press, magnetic drill, or hand drill accepting a straight shank. Suitable for drilling alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, high strength bronze, magnesium, magnesium alloy, malleable iron, nickel, nickel alloy, reinforced plastic materials, cermet, and stainless steel.

Installation Notes

Secure the straight shank firmly in a keyed or keyless chuck before operation, verifying the bit runs true before cutting. Power down or lock out the drill press or driving tool before changing bits. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and improve hole quality. Follow applicable shop safety standards and wear eye protection during all drilling operations.