Precision Twist Drill 6000099 Extra Length Drill Bit

Product Description

The PRECISION TWIST DRILL 6000099 is a high speed steel extra length drill bit designed for deep-hole drilling applications across a range of metalworking and fabrication tasks. The bit measures 0.3438 inches in diameter with an 8-inch overall length and a 6-inch spiral flute length, giving it the reach needed to drill through thick stock or deep into workpieces where standard-length bits fall short. The 118-degree standard point angle is ground with web thinning on a tapered web, reducing entry resistance and improving chip evacuation. The bright uncoated finish is appropriate for general purpose use. Machinists, tool-and-die workers, and maintenance technicians install this bit in drill presses, lathes, and CNC machines.

This bit is suited for drilling aluminum, magnesium, copper, nickel, synthetic materials, and titanium as primary workpiece materials. It also performs in secondary applications involving stainless steel, hardened steel, high strength bronze, malleable iron, nickel alloys, magnesium alloys, and reinforced plastics. The straight-cylindrical shank seats securely in standard drill chucks and collets. The Series 860 designation places this bit within PRECISION TWIST DRILL's general purpose extra length product line, conforming to ANSI standards.

Key Features

• 0.3438-inch diameter with 8-inch overall length for deep-hole reach
• 6-inch spiral flute length at a 12xD flute-to-diameter ratio for efficient chip clearance
• 118-degree standard point angle with web thinning for reduced entry force
• Tapered web configuration supports rigidity across the full flute length
• Right-hand cutting, two-flute design compatible with standard drill chucks and collets
• High speed steel construction, bright uncoated finish, ANSI-conforming geometry

Compatibility

Designed as an OEM-style general purpose extra length drill bit compatible with standard drill chucks and collets accepting a 0.3437-inch straight-cylindrical shank across drill presses, lathes, and CNC drilling equipment.

Installation Notes

This bit is installed by machinists and maintenance technicians in machine shop and field environments. Before mounting, ensure the spindle is fully powered down and the chuck or collet is clean and free of debris to prevent runout. Secure the shank fully to the rated grip depth of the chuck or collet before operation. Use cutting fluid or coolant appropriate for the workpiece material when drilling harder metals to extend tool life and maintain dimensional accuracy.