Precision Twist Drill 5997122 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997122 is a taper length high speed steel drill bit designed for precision drilling in a wide range of metals and materials. At 0.0890 inches in diameter (Wire Size 43), it features a 135-degree split point for self-centering entry without a center punch, reducing walking on hard or smooth surfaces. The parabolic flute geometry with a 6xD flute-to-diameter ratio promotes efficient chip evacuation during deeper cuts. The bright/uncoated finish suits general-purpose applications where coating is not required. Licensed tradespeople and machinists rely on this bit for reliable performance across production and maintenance drilling tasks.

This drill bit is suited for drilling into 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. Its taper length body provides additional reach compared to jobber-length bits, making it appropriate for deeper hole applications in both shop and field environments. The straight shank fits standard drill chucks without adapters.

Key Features

• 135-degree split point for self-centering, no pilot hole required
• Parabolic flute design with 6xD ratio for improved chip evacuation on deeper cuts
• High speed steel construction rated for heavy-duty general-purpose use
• Bright/uncoated finish compatible with cutting fluids and coolants
• Web-thinned tapered web reduces thrust and improves cutting efficiency
• Right-hand cut, straight shank fits standard keyed and keyless chucks

Compatibility

Designed as an OEM-style taper length replacement drill bit for use in standard straight-shank drill chucks on drill presses, CNC machines, and hand drills requiring a 0.0890-inch Wire Size 43 diameter bit in the QC91P series.

Installation Notes

Install the straight shank securely in a properly sized drill chuck and verify tightness before operation. Ensure the workpiece is clamped or fixtured before drilling to prevent rotation or movement. Apply cutting fluid or coolant as appropriate for the material being drilled to extend bit life and improve hole finish. Follow applicable ANSI safety standards for rotating tool use when operating drill presses or portable drilling equipment.