Precision Twist Drill 5999726 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999726 is a taper length drill bit designed for general-purpose drilling in a wide range of materials. Manufactured from high speed steel (HSS) with a bright/uncoated finish, it features a 0.1590-inch diameter, a 118-degree standard drill point angle, and a right-hand spiral flute configuration. The taper length body provides additional rigidity and reach compared to jobber-length bits, making it well suited for deeper hole applications where a standard-length bit falls short. Web thinning reduces thrust and improves chip evacuation at the tip. This bit is part of the Series R52 line and conforms to ANSI standards.

This drill bit is used across metalworking, fabrication, and maintenance trades wherever general-purpose drilling is required. The 0.1590-inch diameter corresponds to wire gauge size 21. The straight shank mounts directly into standard drill chucks on both handheld and stationary equipment. It is appropriate for use in light machine shop work, field service drilling, and production environments. The 5-3/4-inch overall length and 3-3/8-inch flute length give it the clearance needed for deeper-hole applications in the listed material groups.

Key Features

• High speed steel construction for durability across a broad material range
• 118-degree standard point angle with web-thinned tip for reduced thrust and improved starting accuracy
• Taper length body at 5-3/4 inches overall with a 3-3/8-inch flute length for extended reach
• Right-hand spiral flute with regular spiral type promotes efficient chip evacuation
• Straight shank at 0.1590 inches fits standard drill chucks without adapters
• ANSI-compliant general-purpose grade suitable for production and maintenance drilling

Compatibility

Designed for drilling into 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

Machinists and maintenance technicians should secure the straight shank fully in the drill chuck before operation and verify chuck key removal prior to powering the machine. Use appropriate cutting fluid for the material being drilled to extend tool life and maintain hole quality. Follow applicable shop safety practices and ANSI machining standards when setting spindle speed for the material and diameter.