Precision Twist Drill 5996284 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996284 is a taper length cobalt drill bit designed for heavy-duty metal drilling applications. Built from cobalt tool material, this bit handles the thermal and mechanical demands of drilling tough ferrous and non-ferrous materials. The 35/64 inch (0.5469 inch) diameter is paired with a 135-degree notched split point that promotes self-centering entry and reduces walking on hard surfaces without a center punch. A tapered web configuration and web-thinned geometry reduce thrust requirements and improve chip evacuation. Licensed tradespeople and machinists working in fabrication, maintenance, and industrial settings will find this bit sized and constructed for productive, repeatable use.

This drill bit is suited for use in machine shops, fabrication facilities, and field maintenance environments where a wide range of materials must be drilled cleanly and efficiently. The 4-7/8 inch flute length and 8-1/4 inch overall length give the bit extra reach for deeper holes compared to a jobber-length equivalent. The spiral flute with a 6xD flute-to-diameter ratio and right-hand cut suits standard drill press, milling machine, and handheld drill motor setups. The straight shank fits directly into standard chucks without an adapter.

Key Features

• Cobalt tool material for high heat resistance and extended life in alloy and stainless steels
• 135-degree notched split point for self-centering entry and reduced thrust
• Taper length body with 4-7/8 inch flute length for deeper reach than jobber-length bits
• Web-thinned, tapered web configuration for improved chip flow and reduced drill torque
• Straight shank (0.5469 inch diameter) for direct chuck mounting without adapters
• Right-hand spiral flute with regular spiral type for standard drilling operations
• ANSI standard construction rated for heavy-duty drill bit grade performance

Compatibility

The M51CO series designation identifies this as a cobalt taper length drill bit compatible with standard straight-shank drill chucks. Rated for use in 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 as stated in manufacturer specifications.

Installation Notes

Installation of this drill bit is performed by machinists and maintenance technicians using standard drill press, mill, or hand-held drill motor equipment. Secure the straight shank firmly in the chuck and verify concentricity before drilling. Always match spindle speed to the workpiece material and bit diameter using published cutting speed charts for cobalt tooling. Wear appropriate eye protection and secure the workpiece properly to prevent movement during cutting.