Precision Twist Drill 5997448 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997448 is a taper length drill bit in the QC91P series, designed for heavy-duty drilling in a wide range of metals and alloys. Built from high speed steel with a bright/uncoated finish, it features a 135-degree split point and a parabolic flute geometry with web thinning for faster chip evacuation and reduced thrust. The straight shank measures 9/32 inches in diameter, matching the 9/32-inch drill diameter. Overall length is 6-1/4 inches with a flute length of 3-7/8 inches. This bit is intended for professional machinists and metalworking trades requiring a reliable general-purpose taper length drill.

This drill bit is suited for right-hand cut drilling operations in both production and job-shop environments. Its parabolic flute profile and web-thinned split point make it effective in difficult-to-machine materials including stainless steel, hardened steel, titanium, cast iron, aluminum, brass, bronze, copper, carbon steel, alloy steel, magnesium, nickel, and graphite. The taper length body provides additional reach compared to a standard jobber bit, making it useful in applications where clearance depth or reach is a factor. It conforms to ANSI standards and is classified as a heavy-duty grade bit.

Key Features

• 135-degree split point reduces walking and lowers required drilling thrust
• Parabolic flute geometry promotes efficient chip removal at higher feed rates
• Web-thinned, tapered web configuration improves cutting performance in tough alloys
• High speed steel construction provides heat resistance during continuous metal drilling
• Bright/uncoated finish allows easy visual inspection for wear or damage
• ANSI-compliant heavy-duty grade rated for self-centering tool applications

Compatibility

Compatible material applications 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. Designed as a general-purpose taper length drill bit for use in standard straight-shank drill chucks and compatible holding fixtures.

Installation Notes

Installation is performed by machinists or metalworking trades using a drill press, CNC machining center, or hand-held drill with a compatible straight-shank chuck. Secure the shank fully in the chuck before operation and verify chuck tightness. Always wear appropriate eye protection and secure the workpiece before drilling. Follow shop safety procedures and applicable ANSI machining standards when operating at rated speeds and feeds for the target material.