Precision Twist Drill 5996580 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5996580 is a taper length cobalt drill bit designed for heavy-duty metal cutting in professional trade and industrial applications. Built from cobalt tool material, it delivers superior heat resistance and edge retention compared to standard high-speed steel bits. The 135-degree notched point reduces walking and improves self-centering on contact, while the web-thinned, tapered web configuration reduces thrust load during entry. At 0.6875 inches in diameter with an overall length of 9.25 inches and a flute length of 5.375 inches, this bit is suited for deeper hole applications where standard-length bits fall short. Right-hand spiral flutes evacuate chips efficiently throughout the cut.

This drill bit is intended for use in industrial and trade shop environments where ferrous and non-ferrous materials are drilled regularly. The cobalt construction and heavy-duty grade rating make it well-suited for production drilling, maintenance work, and fabrication tasks where tool life and consistent performance under heat are priorities. A straight shank provides compatibility with standard drill chucks without requiring a morse taper adapter. The taper length body gives additional reach for deeper through-holes in plate stock, structural sections, and similar workpieces.

Key Features

• Cobalt tool material for extended heat resistance and longer tool life in hard and abrasive materials
• 135-degree notched split point promotes self-centering and reduces the need for a center punch on most surfaces
• Web-thinned, tapered web reduces axial thrust and cutting effort
• Taper length body at 9.25 inches overall with 5.375-inch flute length for deeper hole reach
• Right-hand regular spiral flute design for efficient chip evacuation
• Straight shank at 0.6875 inches diameter fits standard drill chucks and press collets
• Meets ANSI standards; heavy-duty grade rating for demanding production use

Compatibility

The 5996580 is designed for drilling alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, cermet, copper, graphite, hardened steel, high strength bronze, magnesium, magnesium alloy, malleable iron, nickel, nickel alloy, reinforced plastic materials, and stainless steel, per Series M51CO specifications.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or skilled tradesperson familiar with drill press, milling machine, or hand drill operation. Secure the straight shank firmly in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and ensure the workpiece is clamped or fixtured securely before starting the cut. Do not exceed the recommended feed and speed parameters for the material being drilled, and apply cutting fluid when drilling hardened steel or stainless steel to extend tool life and maintain hole quality.