Precision Twist Drill 5996377 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5996377 is a cobalt taper length drill bit designed for heavy-duty metal drilling applications. It measures 0.8750 inches in diameter with a 10-inch overall length and a 6.125-inch spiral flute. The 135-degree notched split point is web-thinned for self-centering entry, reducing the need for a center punch on most workpieces. The straight shank and right-hand spiral flute geometry make it compatible with standard drill presses, milling machines, and CNC setups. It conforms to ANSI standards and is built for sustained performance in demanding production and fabrication environments.

This bit is suited for drilling through a wide range of ferrous and non-ferrous metals including alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, aluminum, aluminum alloy, brass, bronze, high strength bronze, copper, nickel, nickel alloy, magnesium, magnesium alloy, cermet, graphite, and reinforced plastic materials. It is a practical choice for machine shops, fabrication facilities, and maintenance environments where a single bit must handle varied material stacks or where material hardness demands cobalt tooling over standard high-speed steel.

Key Features

• Cobalt tool material provides heat resistance and extended tool life in hard and abrasive materials
• 135-degree notched split point with web thinning enables self-centering entry without a pilot hole
• Tapered web configuration adds rigidity along the full 6.125-inch flute length
• Right-hand regular spiral flute promotes efficient chip evacuation
• Straight shank at 0.8750 inches fits standard drill chucks and collet systems
• ANSI-compliant heavy-duty grade construction for high-performance production use

Compatibility

Designed as a taper length drill bit in the M51CO series, compatible with standard drill press chucks, milling machine spindles, and CNC tool holders accepting a 0.8750-inch straight shank. Suitable for use in right-hand cutting applications across the material types listed in the product specifications.

Installation Notes

This bit is installed and operated by machinists, toolroom technicians, and metalworking professionals using drill presses, knee mills, or CNC machining centers. Ensure the machine spindle is fully stopped and the chuck or collet is properly torqued before beginning any drilling operation. Secure the workpiece firmly to prevent movement during entry. Follow applicable shop safety procedures and machine manufacturer guidelines for speed and feed rates based on material type and bit diameter.