Precision Twist Drill 5996133 Cobalt Drill Bit 1/2 in

Product Description

The PRECISION TWIST DRILL 5996133 is a screw machine length cobalt drill bit designed for high-performance drilling in hard and difficult-to-machine materials. Built to ANSI standards, this 1/2-inch bit features a 135-degree split point angle with web thinning for fast, accurate starts without a center punch. The straight-cylindrical shank seats securely in standard drill chucks. Cobalt construction provides heat resistance and edge retention when cutting through stainless steel, hardened alloys, and other tough workpiece materials. This is a right-hand cut bit with a regular spiral flute and tapered web configuration, part of the Series M40CO line.

This bit is intended for screw machine and production drilling operations where shorter flute length improves rigidity and reduces deflection. It is well suited for metalworking applications in manufacturing, maintenance, and fabrication environments. The 1/2-inch diameter and 2.5xD flute-to-diameter ratio make it a practical choice for drilling hard materials in drill presses, CNC machines, and hand-held heavy-duty drills. The screw machine length profile is favored by machinists and metal fabricators who need a stiffer bit in confined setups.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard materials
• 135-degree split point with web thinning for self-centering starts and reduced thrust
• Screw machine (stub) length design increases rigidity and reduces deflection
• Right-hand cut with regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Meets ANSI standards for dimensional accuracy and performance

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for production and maintenance drilling applications requiring a 1/2-inch screw machine length cobalt bit in the 0.5000 to 0.6000 decimal inch drill bit size range.

Installation Notes

Installation is performed by machinists, metal fabricators, and maintenance technicians. Secure the straight-cylindrical shank fully in the drill chuck before operation and verify chuck key is removed prior to starting the machine. Use appropriate cutting fluid or coolant when drilling hard materials to preserve edge life and manage heat buildup. Follow applicable shop safety procedures and machine-specific operating guidelines during use.