Precision Twist Drill 5996596 Cobalt Drill Bit 13/64

Product Description

The PRECISION TWIST DRILL 5996596 is a taper length cobalt drill bit designed for high-performance drilling in demanding shop and field environments. Built to Series M51CO specifications, it features a 13/64-inch (0.2031-inch) diameter, a 135-degree split point for self-centering entry, and a gold oxide finish. The cobalt construction delivers elevated heat resistance and edge retention compared to standard high-speed steel, making it a reliable choice for machinists, fabricators, and maintenance trades working with hard or abrasive materials. The web-thinned, tapered web design reduces thrust and improves chip evacuation.

This drill bit is suited for use on drill presses, milling machines, and hand-held power tools in both production and maintenance applications. Its straight cylindrical shank fits standard three-jaw chucks without adapters. The 3-5/8-inch flute length and 6-inch overall length (6xD flute-to-diameter ratio) provide the reach needed for deeper hole profiles that standard-length bits cannot achieve. It is well matched to shops and trades that regularly work with tough or layered stock.

Key Features

• Cobalt tool material with gold oxide finish for heat resistance and extended tool life
• 135-degree split point promotes self-centering and reduces walking on hard surfaces
• Web-thinned, tapered web reduces drilling thrust and aids chip clearance
• Taper length body at 6 inches overall length for deeper reach than jobber-length bits
• Right-hand spiral flute with regular helix for efficient chip evacuation
• ANSI standard construction for consistent dimensional tolerances

Compatibility

Rated for drilling alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, high-strength bronze, magnesium, magnesium alloy, malleable iron, nickel, nickel alloy, reinforced plastic, stainless steel, and general steel stock.

Installation Notes

Install and remove this bit with the drill press or power tool fully powered off and the chuck key removed from the work area before securing the shank. Secure the straight cylindrical shank firmly in a properly sized three-jaw chuck to prevent slippage under load. Use appropriate cutting fluid for the workpiece material, particularly when drilling stainless steel or hardened steel, to manage heat buildup. Verify spindle speed settings match the material and diameter before beginning the cut.