Precision Twist Drill 5997209 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997209 is a taper length, high-speed steel drill bit from the QC91P series, designed for heavy-duty drilling in metal fabrication, machining, and general industrial applications. At 13/32 inches (0.4062 inches) in diameter, it features a 135-degree split point that reduces walking on contact and minimizes the need for a center punch. The parabolic flute geometry promotes rapid chip evacuation, keeping the cutting zone clear during deep-hole drilling. The bright, uncoated finish suits a wide range of materials where coating buildup or heat transfer is a concern. Installers and machinists working with production drilling or repair-shop applications will find this bit suited for consistent, repeatable results.

This drill bit is intended for use in drill presses, CNC machining centers, and hand-held drilling equipment across metalworking, maintenance, and fabrication trades. The straight cylindrical shank fits standard drill chucks without adapters. The self-centering split point and web-thinned, tapered web configuration make it particularly effective when drilling into tough or layered materials. It is rated for general-purpose performance with a heavy-duty grade designation, making it appropriate for production runs as well as one-off service work.

Key Features

• 135-degree split point reduces bit walking and eliminates the need for a center punch in most applications
• Parabolic flute design accelerates chip evacuation, reducing heat buildup during deep-hole drilling
• Web-thinned, tapered web lowers thrust requirements and extends tool life
• High-speed steel construction provides durability across a broad range of metals and alloys
• Bright uncoated finish compatible with cutting fluids and suitable for a wide material range
• Straight cylindrical shank fits standard drill chucks without modification

Compatibility

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. Fits any standard drill chuck accepting a 0.4063-inch straight shank. Conforms to ANSI standards.

Installation Notes

This bit is installed and operated by machinists, tool-and-die workers, maintenance technicians, and metalworking tradespeople. Secure the straight shank fully in the drill chuck before operation and verify chuck tightness. Apply appropriate cutting fluid for the workpiece material to extend bit life and improve finish quality. Do not exceed the recommended feed rate or spindle speed for the material being drilled, as overheating will reduce HSS tool life significantly.