Precision Twist Drill 5998704 Jobber Drill Bit 19/64

Product Description

The PRECISION TWIST DRILL 5998704 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. Ground from high-speed steel with a steam oxide coating, it measures 19/64 inch (0.2969 inch) in diameter with a 4.375-inch overall length and a standard 118-degree point angle. The two-flute spiral design with a tapered web and web-thinned tip promotes efficient chip evacuation and reduces thrust on entry. This bit is suited for use in hand-held drills, drill presses, and CNC or manual machining setups where a straight-cylindrical shank is required. It is typically installed and operated by machinists, maintenance technicians, and trade professionals working in fabrication or service environments.

This Series R10 jobber drill bit is built for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. With a flute-to-diameter ratio of 10xD and a maximum drilling depth of 3.0625 inches, it handles a wide range of hole-making tasks in both light production and general maintenance applications. The straight-cylindrical shank seats securely in standard Jacobs-style chucks and collet holders commonly found across trade and shop environments.

Key Features

• Steam oxide coating reduces friction and provides light corrosion resistance during storage and use
• 118-degree standard point angle with web-thinned tip lowers drilling thrust and improves self-centering on flat surfaces
• Two spiral flutes with regular helix promote consistent chip clearance in through-hole and blind-hole drilling
• Straight-cylindrical shank at 0.2969 inch diameter fits standard drill chucks without an adapter
• Tapered web configuration adds rigidity and reduces bit deflection at depth
• Meets ANSI standards for jobber-length drill geometry and tolerances

Compatibility

Designed as a general-purpose jobber-length replacement drill bit compatible with any drill press, hand drill, or machining center equipped with a standard chuck or collet accepting a straight-cylindrical shank in the 19/64 inch diameter range. Compatible workpiece materials include steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium per Series R10 specifications.

Installation Notes

Insert the straight-cylindrical shank fully into the chuck or collet and tighten securely before operation. Always power down and de-energize the drill press or disconnect the hand drill from its power source before changing bits. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to manage heat buildup, as this bit does not support through-coolant delivery. Follow applicable shop safety standards and wear appropriate eye protection during all drilling operations.