Precision Twist Drill 5997426 Taper Length Drill Bit 5/64 in

Product Description

The PRECISION TWIST DRILL 5997426 is a taper length drill bit from the QC91P series, engineered for heavy-duty general-purpose drilling across a wide range of metals and materials. Built from high-speed steel (HSS) with a bright/uncoated finish, it measures 5/64 inch (0.0781 inch) in diameter with a 135-degree split point that promotes self-centering and reduces walking on entry. The parabolic flute geometry accelerates chip evacuation, making it well suited for production environments and repetitive hole-making tasks. The straight cylindrical shank ensures consistent chuck engagement in standard drill chucks and CNC toolholders.

This bit is designed for use across a broad spectrum of materials including alloy steel, carbon steel, stainless steel, hardened steel, tempered steel, cast iron, malleable iron, aluminum, aluminum alloys, brass, bronze, copper, nickel, titanium, titanium alloys, magnesium, magnesium alloys, and graphite. It is appropriate for machine shop, maintenance and repair, and light fabrication environments where a small-diameter, taper-length bit is needed. The 6xD flute-to-diameter ratio provides additional reach compared to a jobber-length bit in the same diameter class.

Key Features

• 135-degree split point with web thinning for self-centering entry and reduced thrust
• Parabolic flute geometry for fast, efficient chip removal
• High-speed steel construction rated for heavy-duty applications
• Bright/uncoated finish suitable for use with cutting fluids or dry
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets ANSI standards for dimensional consistency

Compatibility

Designed as an OEM-style taper length drill bit compatible with standard drill chucks, CNC machining centers, and benchtop drill presses that accept straight shank tooling in the 5/64 inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with metal-cutting operations. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the machine before changing tooling. Use appropriate cutting fluid for the material being drilled to extend tool life and maintain hole quality.