Precision Twist Drill 5999896 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999896 is an extra length, high speed steel drill bit designed for deep-hole drilling applications where standard length bits cannot reach. Built to Series 1813 specifications, it features a 118-degree point angle with web thinning for reduced thrust and cleaner entry. The 11/16-inch (0.6875 inch) diameter and 18-inch overall length make it well suited for production and maintenance machining in metal fabrication, aerospace, and general industrial environments. The uncoated HSS construction allows easy regrinding and performs reliably across a wide range of workpiece materials without specialized tooling equipment.

This bit is intended for use in vertical mills, drill presses, and CNC machining centers where extended reach is required. Primary workpiece materials include aluminum, magnesium, copper, nickel, synthetic materials, and titanium. Secondary applications cover stainless steel, hardened steel, nickel alloys, malleable iron, high strength bronze, magnesium alloys, reinforced plastics, and standard steel. The right-hand, spiral flute geometry promotes efficient chip evacuation over the 13-inch flute length, reducing heat buildup during extended-depth cuts.

Key Features

• 11/16 inch (0.6875 inch) diameter with matching straight-cylindrical shank for direct chuck mounting
• 18-inch overall length and 13-inch flute length for deep-hole reach beyond standard drill capacity
• 118-degree standard point angle with web thinning and tapered web configuration for lower entry thrust
• Regular spiral, right-hand cutting direction with 2-flute geometry for efficient chip clearance
• Uncoated high speed steel construction — resharpenable and compatible with standard bench grinders
• Meets ANSI standards; rated for general purpose drilling across a broad range of ferrous and non-ferrous materials

Compatibility

Designed for use with standard drill chucks and collet systems accepting a 0.6875-inch straight-cylindrical shank. Suitable for drilling aluminum, magnesium, copper, nickel, titanium, stainless steel, hardened steel, nickel alloys, malleable iron, high strength bronze, reinforced plastics, and general steel per Series 1813 application ratings.

Installation Notes

Installation and use of this bit should be performed by machinists or qualified trades personnel familiar with machine tool operation. Secure the shank fully in the chuck or collet and verify runout before beginning a cut. Power down and lock out the machine before changing bits or making adjustments. Do not exceed the machine spindle speed rating appropriate for the workpiece material and bit diameter.