Precision Twist Drill 5995712 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5995712 is a taper length cobalt drill bit designed for high-performance drilling in demanding metal fabrication and machining applications. Built to Series M52CO specifications, this bit features a 135-degree split point for accurate self-centering entry with minimal walking, and a spiral flute geometry with a 6xD flute-to-diameter ratio. At wire gauge size 40 (0.0980 inches decimal), it delivers tight-tolerance hole sizing in materials that defeat standard high-speed steel tooling. Licensed machinists, tool and die technicians, and production drill press operators are the primary users.

This drill bit is suited for production and maintenance drilling in alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, aluminum, aluminum alloy, brass, bronze, high-strength bronze, copper, magnesium, magnesium alloy, nickel, nickel alloy, reinforced plastic, graphite, and cermet. The taper length body provides additional reach compared to jobber-length bits, making it useful in setups where the workpiece depth or fixture clearance requires extended flute access. It is rated for heavy-duty duty cycle at the bench, CNC drill press, or hand-held power tool where a straight-cylindrical shank chuck is used.

Key Features

• Cobalt tool material with gold oxide coating for extended tool life in hard and abrasive materials
• 135-degree split point with web-thinned, tapered web configuration for self-centering entry
• 2.5-inch flute length with 6xD flute-to-diameter ratio for deep-hole chip evacuation
• 4.625-inch overall length (taper length body) for extended reach applications
• Straight-cylindrical shank (0.0980 inches diameter) fits standard drill chucks without adapters
• Right-hand cut, regular spiral flute for efficient chip clearing in through-hole and blind-hole drilling
• Meets ANSI standards; heavy-duty grade for continuous production use

Compatibility

Designed as an OEM-style taper length replacement drill bit for use with any standard drill chuck accepting a straight-cylindrical shank at 0.0980 inches diameter; compatible with the full range of materials listed under Series M52CO including ferrous metals, non-ferrous metals, and engineered plastics as specified in the supplier attribute data.

Installation Notes

Install the straight shank fully into the drill chuck and tighten securely before operation. Secure the workpiece with appropriate fixturing to prevent rotation during drilling. Use cutting fluid or coolant appropriate to the workpiece material to preserve edge life, noting that this bit does not support through-spindle coolant delivery. Follow applicable shop safety protocols and machine guarding requirements when operating drill presses or CNC equipment.