Precision Twist Drill 5999945 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999945 is a high-speed steel extra length drill bit engineered for deep-hole drilling applications where standard-length bits cannot reach. Built to ANSI standards, this bit measures 18 inches overall with a 13-inch flute length and a 0.3281-inch diameter. The 118-degree standard point angle and web-thinned, tapered web geometry provide reliable centering and reduced thrust on entry. The bright, uncoated finish suits general-purpose use across a wide range of workpiece materials. Right-hand spiral flutes evacuate chips efficiently during extended-reach drilling operations. Machinists, maintenance technicians, and fabricators working in production or field environments will find this bit suited to demanding, deep-bore applications.

This extra length drill bit is designed for use in ferrous and non-ferrous materials including aluminum, magnesium, copper, nickel, titanium, stainless steel, hardened steel, malleable iron, nickel alloys, high-strength bronze, reinforced plastics, and synthetic materials. The 15xD flute-to-diameter ratio makes it particularly well suited for through-holes in thick plate, structural steel, or deep-cavity workpieces where chip clearance and rigidity over length are critical factors. Series 1813 construction follows ANSI specification designations for straight-shank extra length bits.

Key Features

• 18-inch overall length with 13-inch flute length for deep-hole reach
• 0.3281-inch diameter with straight-cylindrical shank for standard chuck compatibility
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Two-flute right-hand spiral design for efficient chip evacuation
• Bright, uncoated high-speed steel construction suitable for general-purpose drilling
• ANSI-compliant Series 1813 design for consistent dimensional tolerances

Compatibility

Designed as an OEM-style extra length drill bit for use in standard 3-jaw chucks and compatible drilling equipment accepting a straight-cylindrical shank of 0.3281 inches. Rated for primary use in aluminum, magnesium, copper, nickel, synthetic, and titanium workpiece materials, with secondary application in hardened steel, stainless steel, malleable iron, nickel alloys, high-strength bronze, magnesium alloys, and reinforced plastics.

Installation Notes

Install and replace drill bits with the machine powered down and the spindle fully stopped. Secure the straight-cylindrical shank firmly in a properly sized chuck, verifying there is no runout before beginning the cut. Use appropriate cutting fluid or coolant for the workpiece material being drilled, as this bit does not feature coolant-through capability. Wear appropriate eye and hand protection in accordance with applicable workplace safety standards.