Precision Twist Drill 5996365 7/16 Inch Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996365 is a taper length cobalt drill bit designed for high-performance drilling in demanding trade and industrial applications. Built to Series M51CO standards, this bit measures 7/16 inches in diameter with a 135-degree split point and a gold oxide finish. The cobalt tool material provides superior heat resistance compared to standard HSS bits, making it well suited for tough ferrous and non-ferrous materials. A web-thinned, tapered web configuration reduces thrust and promotes self-centering entry. Spiral fluting with a 6xD flute-to-diameter ratio clears chips efficiently during deep-hole drilling operations.

This drill bit is intended for use by machinists, maintenance technicians, fabricators, and trade professionals working with a wide range of materials. Rated for use on 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, reinforced plastic, cermet, and graphite. The taper length format provides additional reach beyond standard jobber bits, making it a practical choice for through-hole work in thicker stock or where a longer flute length is required.

Key Features

• Cobalt tool material with gold oxide finish for extended heat resistance and tool life
• 135-degree split point promotes self-centering and reduces walking on entry
• Web-thinned tapered web lowers thrust requirements on tough materials
• 4-5/8 inch flute length with 6xD ratio for efficient chip evacuation
• Right-hand spiral flute, straight cylindrical shank — compatible with standard drill chucks
• Meets ANSI standards; heavy-duty grade construction

Compatibility

Designed as a standard straight-shank taper length drill bit compatible with any drill press, hand drill, or milling machine chuck sized to accept a 7/16 inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists and maintenance technicians using a drill press, hand drill, or milling machine. Secure the shank fully in the chuck and verify concentricity before drilling. Always use appropriate cutting fluid or coolant when drilling stainless steel, hardened steel, or other work-hardening alloys to protect tool life. Wear appropriate PPE including eye protection when operating drilling equipment.