Precision Twist Drill 5997425 Taper Length Drill Bit 11mm

Product Description

The PRECISION TWIST DRILL 5997425 is a taper length drill bit from the QC91PM series, designed for demanding metalworking and fabrication applications. Built from high-speed steel with a bright/uncoated finish, it features a 135-degree split point for self-centering entry that reduces walking on initial contact. The parabolic flute geometry, paired with a web-thinned, tapered web configuration, promotes efficient chip evacuation and helps maintain cutting speeds through deeper holes. At 11 mm in diameter with a 6xD flute-to-diameter ratio, this bit is sized for through-hole work where standard jobber length falls short. It is intended for installation and use by machinists, tool-and-die professionals, maintenance technicians, and fabricators working in shop or field environments.

This drill bit is suited for use in stationary drill presses, milling machines, and handheld industrial drills across a wide range of materials. Its taper length body provides extended reach compared to standard jobber bits, making it appropriate for deep-hole drilling in structural components, fixtures, and fabricated assemblies. The straight shank interfaces directly with standard drill chucks without requiring an adapter. 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.

Key Features

• 135-degree split point provides self-centering entry and reduces drill walk on hard and smooth surfaces
• Parabolic flute profile with web thinning promotes fast, clean chip evacuation in deep holes
• High-speed steel construction rated for heavy-duty performance across a broad material range
• Taper length body at a 6xD flute ratio extends reach beyond standard jobber configurations
• Straight shank with 11 mm shank diameter fits standard drill chucks without adapters
• Conforms to DIN 340 specification for consistent dimensional tolerancing

Compatibility

Designed as an OEM-style taper length drill bit conforming to DIN 340 standards, compatible with standard straight-shank drill chucks accepting an 11 mm shank diameter.

Installation Notes

This drill bit is installed by machinists and fabricators using standard drill chuck equipment. Before changing or setting a bit, ensure the drill press, mill, or handheld drill is fully powered down and the chuck is secured with the appropriate key before beginning work. Use cutting fluid or coolant appropriate to the workpiece material to extend tool life, particularly when drilling stainless steel, hardened steel, or titanium alloys. Do not exceed the recommended feed rate or spindle speed for the material being drilled, as overloading a high-speed steel bit can cause premature dulling or breakage.