Precision Twist Drill 5997190 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997190 is a taper length drill bit from the QC91P series, designed for general-purpose drilling in metal fabrication, machining, and maintenance applications. Built from high speed steel (HSS) with a bright/uncoated finish, it measures 1/16 inch (0.0625 inches) in diameter with a 135-degree split point that reduces walking and improves hole entry accuracy. The parabolic flute geometry accelerates chip evacuation, making it well suited for deeper holes relative to diameter. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this bit.

This bit fits applications across a wide range of materials including alloy steel, carbon steel, stainless steel, cast iron, aluminum, brass, bronze, copper, titanium, magnesium, and hardened or tempered steel. The 6xD flute-to-diameter ratio and taper length body provide additional reach compared to a standard jobber bit, making it useful in tight or recessed locations where a jobber length would fall short. It is a heavy-duty grade bit conforming to ANSI standards.

Key Features

• 135-degree split point reduces bit walking and requires no center punch on most metals
• Parabolic flute design improves chip removal efficiency in deeper cuts
• Web-thinned, tapered web configuration reduces thrust and cutting resistance
• High speed steel construction handles a broad range of ferrous and non-ferrous materials
• Straight cylindrical shank fits standard drill chucks without adapters
• ANSI-compliant, heavy-duty grade for consistent dimensional accuracy

Compatibility

Designed as a general-purpose taper length drill bit compatible with any standard drill chuck accepting a 1/16 inch straight shank. Rated for use in alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, magnesium, magnesium alloy, malleable iron, nickel, stainless steel, steel, tempered steel, titanium, and titanium alloy.

Installation Notes

Install in a drill press, CNC machine, or hand drill with a compatible chuck rated for 1/16 inch shanks. Secure the shank fully in the chuck and verify runout before cutting. Use appropriate cutting fluid for ferrous metals and hardened materials to extend tool life. Disconnect or de-energize the machine before changing bits.