Precision Twist Drill 5996011 Cobalt Drill Bit 13/32 in

Product Description

The PRECISION TWIST DRILL 5996011 is a screw machine length cobalt drill bit designed for high-performance drilling in hard and tough materials. Built to Series M40CO standards using M40-grade cobalt high-speed steel, it delivers superior heat and wear resistance over standard HSS bits. The 135-degree split point reduces walking and cutting pressure at entry, making it well suited for production drilling environments where accuracy and bit longevity matter. At 3-5/16 inches overall length with a 1-15/16-inch flute length, this short-body design provides rigidity and reduced deflection in drill press and CNC applications.

This bit is sized at 13/32 inches (0.4062 inches decimal) with a straight-cylindrical shank of the same diameter, fitting standard drill chucks without adapters. It is built for right-hand cutting with a regular spiral and tapered web configuration. Web thinning reduces thrust requirements, which is especially useful when drilling hard metals, stainless steel, alloys, and other difficult workpiece materials. It carries an ANSI specification designation and a 2.5xD flute-to-diameter ratio. Trade machinists, tool-and-die techs, and metalworking professionals working in shop or field settings are the primary users.

Key Features

• M40-grade cobalt construction for high heat resistance and extended tool life in hard materials
• 135-degree split point reduces drill walk and lowers entry cutting force
• Web-thinned, tapered web design decreases thrust and improves chip clearance
• Screw machine length (3-5/16 inches OAL) provides added rigidity over jobber-length bits
• Right-hand cut with regular spiral flutes and straight-cylindrical shank for standard chuck compatibility
• Meets ANSI standards; rated for heavy-duty, high-performance drilling applications

Compatibility

Designed as an OEM-style replacement or direct-fit screw machine length drill bit for use in standard drill chucks, drill presses, and CNC machining centers accepting a 0.4062-inch straight-cylindrical shank. Suitable for drilling hard metals and difficult alloys per Series M40CO application guidelines.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with metal-cutting operations. Secure the straight-cylindrical shank fully in the chuck before operation and verify concentricity to minimize runout. Always wear appropriate PPE, including eye protection, when operating cutting tools. Follow machine manufacturer speed and feed recommendations for cobalt bits in the applicable workpiece material.