Precision Twist Drill 5996408 Cobalt Drill Bit 0.1910 in

Product Description

The PRECISION TWIST DRILL 5996408 is a taper length cobalt drill bit designed for demanding metal drilling applications where standard high-speed steel bits fall short. At 0.1910 inches in diameter (Wire Size 11), the bit features a 135-degree split point that self-centers on contact, eliminating the need for a center punch on most surfaces. The straight shank and spiral flute geometry are engineered for consistent chip evacuation across a 3.625-inch flute length, with a 6-inch overall length providing reach in deeper bores. This is a heavy-duty tool built for professional machinists, maintenance mechanics, and trade technicians working with tough materials.

This bit is suited for drilling alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, copper, brass, bronze, high-strength bronze, nickel, nickel alloys, aluminum, aluminum alloys, magnesium, magnesium alloys, reinforced plastics, cermet, and graphite. It fits typical drill press, handheld drill, or CNC drilling setups using a standard straight-shank chuck. The taper length format gives added reach compared to jobber-length bits, making it useful in production and maintenance environments where access depth matters.

Key Features

• Cobalt construction handles high-heat applications and hardened or abrasive materials
• 135-degree split point self-centers and reduces walking on flat or curved surfaces
• Taper length body at 6 inches overall length provides deeper reach than standard jobber bits
• Right-hand cut spiral flute with web-thinned, tapered web for reduced thrust and improved chip flow
• Straight shank at 0.1910 inches diameter fits standard drill chucks without an adapter
• Meets ANSI standards; Series M52CO heavy-duty grade

Compatibility

Designed as an OEM-style replacement or direct-use taper length drill bit for straight-shank drill chucks accepting 0.1910-inch shanks, compatible across drill presses, handheld drills, and CNC drilling equipment per Series M52CO specifications.

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, or trade professionals using drill presses or powered hand drills. Secure the straight shank firmly in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before starting a cut. Do not exceed the recommended feed and speed ranges for the target material, and allow the bit to cool between deep or repeated passes to preserve the cobalt edge.