Precision Twist Drill 5999558 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999558 is a taper length drill bit designed for general-purpose drilling across a wide range of materials. Built from high speed steel with a bright, uncoated finish, it measures 0.2570 inches in diameter and carries a standard 118-degree point angle. The flute length runs 3.875 inches, and the overall length is 6.25 inches, giving it the extended reach characteristic of a taper length profile. A web-thinned, tapered web configuration reduces thrust at entry. This bit is suited for machinists, maintenance technicians, and fabricators working with drill presses, lathes, or hand-held equipment on production and job-shop floors.

The 5999558 is a Series R55 taper length bit with a straight shank and right-hand spiral flute. Its 6xD flute-to-diameter ratio provides chip clearance on deeper holes. It is appropriate for drilling into alloy steel, carbon steel, stainless steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, high strength bronze, copper, magnesium, magnesium alloy, nickel, nickel alloy, cermet, graphite, and reinforced plastic materials. The Letter F size designation (0.2570 inches decimal equivalent) makes it a standard selection for through-hole and clearance-hole work.

Key Features

• High speed steel construction for general-purpose durability across ferrous and non-ferrous materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• 0.2570 inch diameter, Letter F designation, straight shank with 0.2570 inch shank diameter
• 3.875-inch flute length, 6.25-inch overall length for extended reach in taper length applications
• Right-hand cut, regular spiral flute geometry for efficient chip evacuation
• Bright, uncoated finish; no coolant-through feature; ANSI-standard compliance

Compatibility

Designed as a general-purpose taper length drill bit compatible with standard straight-shank drill chucks on drill presses, milling machines, and hand-held drilling equipment. Suitable for the material applications listed in the product specifications per Series R55 design intent.

Installation Notes

Install in a compatible straight-shank chuck and verify chuck capacity accommodates a 0.2570 inch shank before tightening. Power down and de-energize all equipment before changing tooling. Use appropriate cutting fluid or dry-cutting technique based on the workpiece material to manage heat and extend tool life. Secure workpieces firmly and follow applicable shop safety standards for rotating tooling.