Precision Twist Drill 5996609 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996609 is a taper length cobalt drill bit engineered for high-performance drilling in demanding industrial and trade applications. Built from cobalt tool material with a gold oxide coating, this bit delivers superior heat resistance and extended tool life compared to standard high-speed steel. The 135-degree split point promotes self-centering entry and reduces walking on hard or smooth surfaces. At 15/64 inches in diameter with a 3-3/4 inch flute length and 6-1/8 inch overall length, it provides extended reach for through-hole and deep-hole drilling tasks. Machinists, fabricators, and maintenance technicians rely on this bit for consistent, accurate results on tough materials.

This drill bit is suited for use in vertical mills, drill presses, and hand-held drilling equipment across industrial, fabrication, and maintenance environments. The taper length format offers more flute depth than a jobber bit, making it well matched for applications requiring deeper penetration without step-drilling. Compatible material applications include alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, aluminum, aluminum alloy, brass, bronze, high-strength bronze, copper, nickel, nickel alloy, magnesium, magnesium alloy, reinforced plastic, graphite, and cermet. It is appropriate for both production drilling and one-off repair work.

Key Features

• Cobalt tool material with gold oxide finish for heat resistance and longer tool life in tough alloys
• 135-degree split point with web thinning for self-centering and reduced thrust on entry
• Taper length body at 6-1/8 inches OAL provides extended reach beyond standard jobber geometry
• Right-hand spiral flute with regular helix promotes efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters
• Conforms to ANSI standards; heavy-duty grade for high-performance applications

Compatibility

Designed as an OEM-style taper length drill bit suitable for use in standard drill press chucks, CNC drilling heads, and hand-held drilling equipment accepting a 15/64-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotary cutting tools. Secure the shank fully in the chuck and verify concentricity before drilling. Always power down and lock out the machine before changing bits or clearing chips. Use appropriate cutting fluid or coolant for the workpiece material to preserve edge life, particularly when drilling stainless steel or hardened steel.