Precision Twist Drill 5996328 Cobalt Drill Bit 5/64 in

Product Description

The PRECISION TWIST DRILL 5996328 is a taper length cobalt drill bit designed for high-performance drilling across a wide range of metallic and non-metallic materials. Built to Series M51CO standards, this bit features a 135-degree split point for self-centering entry that reduces walking on hard or slick surfaces. The straight shank measures 0.0781 inches in diameter, and the spiral flute runs 2 inches in length for efficient chip evacuation. The right-hand cut geometry and web-thinned, tapered web configuration reduce thrust and improve penetration in demanding applications. Licensed HVAC technicians, pipefitters, electricians, and general tradespeople rely on bits of this grade for precision hole-making in production and field environments.

This drill bit is well-suited for drilling into alloy steel, carbon steel, stainless steel, cast iron, aluminum, brass, bronze, copper, nickel alloys, hardened steel, magnesium alloys, high-strength bronze, malleable iron, cermet, graphite, and reinforced plastic materials. The 6xD flute-to-diameter ratio makes it a practical choice for through-hole and deeper drilling tasks where a standard length bit falls short. It is sold individually with a minimum order quantity of 12 units, making it appropriate for shop stocking or job lot procurement by tradespeople who drill frequently in mixed-material environments.

Key Features

• Cobalt tool material provides heat and wear resistance for drilling hardened and abrasive materials
• 135-degree split point enables self-centering entry without a center punch on most surfaces
• Web-thinned, tapered web configuration reduces cutting thrust and extends bit life
• 2-inch spiral flute length with 6xD ratio supports chip evacuation in deeper holes
• Right-hand cut, straight shank fits standard drill chucks without adapters
• ANSI-standard construction; heavy-duty grade for high-performance tool applications

Compatibility

Designed as an OEM-style replacement and standard fit for straight-shank drill chucks accepting a 0.0781-inch diameter shank; compatible with materials including alloy steel, stainless steel, aluminum, brass, copper, cast iron, nickel alloys, hardened steel, and reinforced plastics as specified by the manufacturer for the M51CO series.

Installation Notes

This bit is installed by machinists, pipefitters, electricians, and general trade technicians using standard keyed or keyless drill chucks. Secure the straight shank fully in the chuck before operating to prevent slippage under load. Always power down and de-energize any equipment being worked on before drilling in live panels or near energized components. Use appropriate cutting fluid or coolant when drilling hardened steel or stainless steel to manage heat buildup, even though coolant-through capability is not present on this bit.