Precision Twist Drill 5999964 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5999964 is a 5/8-inch (0.625 inches) diameter extra length high speed steel drill bit built for deep-hole drilling in a wide range of materials. At 12 inches overall length with a 9-inch spiral flute, it gives machinists and fabricators the reach needed for applications where standard-length bits fall short. The 118-degree standard point angle and web-thinned, tapered web configuration promote accurate starting and efficient chip evacuation. Right-hand cutting with a regular spiral, this bit runs uncoated and is suited to general-purpose production and job-shop use.

This bit is designed for use in drill presses, milling machines, and hand-held power tools where extended reach into deep bores or thick stock is required. Primary workpiece materials include aluminum, magnesium, copper, nickel, synthetic composites, and titanium. It also performs in secondary applications on stainless steel, hardened steel, high-strength bronze, malleable iron, nickel alloys, magnesium alloys, and reinforced plastics. The straight-cylindrical shank at 0.625 inches diameter (3.0 inches shank length) seats securely in standard drill chucks and collets without adapter hardware.

Key Features

• Extra length 12-inch OAL and 9-inch flute length for deep-hole reach beyond standard bit capacity
• 118-degree standard point angle for accurate entry on a broad range of materials
• Web-thinned, tapered web reduces thrust and improves chip clearance
• High speed steel construction withstands heat generated in continuous drilling cycles
• Straight-cylindrical 5/8-inch shank fits standard chucks and collets without adapters
• ANSI-compliant Series 1290 general-purpose grade for consistent dimensional accuracy

Compatibility

Suited for general-purpose drilling in aluminum, magnesium, copper, nickel, titanium, synthetic materials, stainless steel, hardened steel, high-strength bronze, malleable iron, nickel alloys, magnesium alloys, and reinforced plastics as specified by the manufacturer.

Installation Notes

Install in a properly rated drill chuck or collet, confirming the shank is fully seated and secured before operation. Power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant for the workpiece material to manage heat and extend bit life, noting this bit does not support through-coolant delivery. Follow ANSI and applicable shop safety standards when operating rotary cutting tools.