Precision Twist Drill 5999854 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999854 is a 3/4-inch diameter extra length high-speed steel drill bit designed for deep-hole drilling applications across metal fabrication, maintenance, and industrial trades. Built to Series 1511 specifications, it features a 118-degree standard point angle with web thinning for reduced thrust and cleaner entry. The spiral flute geometry and right-hand cutting direction provide efficient chip evacuation during extended cuts. The bright uncoated finish makes this a general-purpose tool suited to machinists, pipefitters, and maintenance technicians who need reach beyond what a jobber-length bit can provide.

This bit is well suited for through-hole drilling in structural steel, aluminum, copper, nickel, titanium, and synthetic materials, as well as secondary use in stainless steel, magnesium alloy, malleable iron, and reinforced plastics. The 15-inch overall length and 11-inch flute length give the user access to deep bores in plate stock, pipe walls, and fabricated assemblies where shorter bits cannot reach. The straight-cylindrical shank accepts standard drill chucks without an adapter.

Key Features

• 3/4-inch diameter with matching 3/4-inch straight-cylindrical shank for secure chuck grip
• 15-inch overall length with 11-inch spiral flute for deep-reach drilling
• 118-degree standard point angle with web thinning and tapered web configuration for reduced entry thrust
• High-speed steel construction, bright uncoated finish — suitable for general-purpose metal drilling
• 2-flute regular spiral, right-hand cutting direction for efficient chip removal
• ANSI-standard geometry; rated for aluminum, copper, nickel, titanium, stainless steel, and reinforced plastics

Compatibility

Designed as a general-purpose extra length drill bit compatible with any standard drill press, magnetic drill, or hand drill equipped with a chuck sized to accept a 3/4-inch straight-cylindrical shank. Primary workpiece materials include aluminum, magnesium, copper, nickel, synthetic, and titanium; secondary materials include hardened steel, stainless steel, high-strength bronze, nickel alloy, malleable iron, magnesium alloy, and reinforced plastics.

Installation Notes

Install and remove this bit with the drill fully powered off and the chuck key removed from the chuck. Secure the straight-cylindrical shank fully into the chuck jaws, confirming all three jaws are evenly engaged before applying torque. When drilling deep holes, retract the bit periodically to clear chips from the flute and prevent heat buildup. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.