Precision Twist Drill 5999679 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999679 is a taper length, straight-shank drill bit designed for general-purpose drilling across a wide range of materials. Built from high speed steel with a bright/uncoated finish, this bit measures 0.2280 inches in diameter with an overall length of 6.125 inches and a flute length of 3.75 inches. The 118-degree standard point angle and right-hand spiral flute geometry deliver consistent cutting performance in production and maintenance drilling applications. Web thinning reduces entry resistance and improves chip evacuation on through-hole work.

This bit is suited for use in metalworking, fabrication, and maintenance environments where a longer-than-standard reach is required. The taper length body provides additional depth capacity beyond a jobber-length bit without sacrificing rigidity. It is appropriate for use in drill presses, CNC machines, and handheld power drills where a straight shank is accepted. The Series R52 designation identifies it within the PRECISION TWIST DRILL general-purpose product line.

Key Features

• 0.2280 inch diameter, also cataloged as Wire Size #1
• 118-degree standard point angle with web-thinned, tapered web configuration
• High speed steel construction for broad material compatibility
• Bright/uncoated finish — no coating to flake or peel under regrinding
• Right-hand spiral flute with 6xD flute-to-diameter ratio
• Straight shank, non-threaded — fits standard drill chucks
• Meets ANSI standards

Compatibility

Compatible material applications include 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.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using standard drill chuck equipment. Secure the straight shank firmly in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid for harder alloys to extend tool life. Inspect the cutting edges for wear before each use and regrind or replace as needed to maintain dimensional accuracy.