Precision Twist Drill 5996586 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996586 is a taper length cobalt drill bit designed for high-performance drilling in demanding industrial and fabrication environments. Built from cobalt tool material with a gold oxide coating, it delivers increased heat resistance and extended tool life compared to standard HSS bits. The 135-degree split point promotes self-centering on contact, reducing walking and the need for a center punch. At 0.1719 inches (11/64 inch) in diameter with a 3-3/8 inch flute length and 5-3/4 inch overall length, this bit suits applications requiring deeper hole penetration than a jobber-length drill provides. Machinists, tool-and-die technicians, and metalworking professionals are the primary installers.

The 5996586 is suited for drilling alloy steel, carbon steel, stainless steel, hardened steel, cast iron, malleable iron, nickel and nickel alloys, brass, bronze, high-strength bronze, copper, aluminum, aluminum alloys, magnesium, magnesium alloys, graphite, cermet, and reinforced plastics. The taper length design provides added reach for deep-hole work on drill presses, milling machines, and CNC machining centers where standard jobber bits fall short. The straight cylindrical shank fits standard drill chucks and collet holders without modification.

Key Features

• Cobalt tool material with gold oxide finish for elevated heat resistance and longer tool life in hard metals
• 135-degree split point for self-centering entry and reduced thrust force
• Taper length body (5-3/4 inch OAL, 3-3/8 inch flute) for deeper reach than jobber-length equivalents
• Web-thinned tapered web configuration reduces cutting resistance on breakthrough
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks and collet systems
• Meets ANSI standards; heavy-duty grade for high-performance material removal

Compatibility

Designed as a taper length straight-shank drill bit compatible with standard drill chucks and collet holders accepting an 11/64 inch (0.1719 inch) shank diameter. Suitable for use in drill presses, milling machines, and CNC machining centers across metalworking and fabrication applications.

Installation Notes

Installation and use should be performed by qualified machinists or metalworking professionals familiar with drilling operations and machine tool safety. Ensure the workpiece is securely clamped and the spindle speed is set to a value appropriate for the material and bit diameter before operation. Power down and de-energize the machine before changing bits or adjusting chuck tension. Do not exceed the rated capacity of the chuck or collet holder when securing the shank.