Precision Twist Drill 5997109 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997109 is a taper length drill bit designed for professional metalworking and machining applications. Built from high speed steel with a bright/uncoated finish, this bit measures 0.0980 inches in diameter (Wire Size 40) with a 4.625-inch overall length and a 2.5-inch parabolic flute. The 135-degree split point reduces walking and allows self-centering entry without a center punch. The tapered web configuration and web-thinned geometry reduce cutting resistance, making this a reliable choice for machinists and toolroom technicians working with a wide range of metals.

This drill bit is suited for general-purpose and heavy-duty drilling in production and maintenance environments. The parabolic flute geometry promotes efficient chip evacuation, which is especially valuable when drilling deeper holes. The 6xD flute-to-diameter ratio supports deeper reach without sacrificing rigidity. Applicable materials include 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.

Key Features

• 135-degree split point for self-centering entry and reduced thrust
• Parabolic flute design promotes fast, efficient chip removal
• High speed steel construction rated for heavy-duty use
• Web-thinned, tapered web configuration reduces cutting resistance
• Straight shank compatible with standard drill chucks
• Bright/uncoated finish suitable for a broad range of metal materials

Compatibility

Designed as an OEM-style replacement and general-purpose taper length drill bit for use in standard straight-shank drill chucks across machining, fabrication, and maintenance applications.

Installation Notes

This bit is installed and used by machinists, toolroom technicians, and maintenance mechanics. Secure the straight shank firmly in a keyed or keyless drill chuck before use and verify chuck runout is within acceptable tolerance. Always wear appropriate eye protection and use cutting fluid when drilling hardened or stainless steel to extend tool life. Do not exceed the recommended feed rate for the material being drilled, as this can cause premature bit failure or workpiece damage.