Precision Twist Drill 5996373 Cobalt Drill Bit 7/64

Product Description

The PRECISION TWIST DRILL 5996373 is a taper length cobalt drill bit designed for heavy-duty drilling in a wide range of metals and engineered materials. Built from cobalt tool steel with a coated finish, it features a 135-degree split point that reduces walking and minimizes the need for a center punch. The right-hand spiral flute, combined with a web-thinned and tapered web configuration, promotes efficient chip evacuation and consistent cutting performance. This bit suits demanding production and maintenance applications where standard HSS bits wear out too quickly. Licensed tradespeople and machinists in metalworking, HVAC fabrication, and industrial maintenance are the primary users.

This drill bit is suited for use in drill presses, hand drills, and CNC drilling setups where a straight-shank, taper-length bit is required. Its taper length body provides greater reach than a jobber-length bit while maintaining rigidity. The Series M51CO designation places it within Precision Twist Drill's heavy-duty cobalt line, making it a go-to choice for shops drilling alloy steel, stainless steel, cast iron, nickel alloys, hardened steel, copper, brass, bronze, and reinforced plastics on a regular basis.

Key Features

• Cobalt tool steel construction for extended tool life in hard and abrasive materials
• 135-degree split point is self-centering and reduces thrust required to start the hole
• Web-thinned, tapered web improves chip flow and reduces heat buildup
• Right-hand spiral flute with regular spiral type for consistent chip evacuation
• Straight shank fits standard drill chucks without an adapter
• Meets ANSI standards for dimensional accuracy and performance

Compatibility

Designed as a taper length straight-shank cobalt drill bit compatible with any standard drill chuck accepting a 0.1094-inch shank diameter. Rated for drilling alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, cermet, copper, graphite, hardened steel, high-strength bronze, magnesium, magnesium alloy, malleable iron, nickel, nickel alloy, reinforced plastic materials, and stainless steel.

Installation Notes

Install the bit securely in a properly sized drill chuck and verify runout before drilling. Power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant when drilling hard metals such as stainless steel or nickel alloys to extend bit life and maintain surface finish. Cobalt bits are brittle compared to standard HSS — avoid side-loading or using them as pry tools, and do not exceed the recommended feed rate for the workpiece material.