Precision Twist Drill 5998699 Jobber Drill Bit 17/64

Product Description

The PRECISION TWIST DRILL 5998699 is a jobber-length, high-speed steel drill bit engineered for general-purpose drilling across a broad range of materials. It measures 17/64 inch (0.2656 inch) in diameter with a 4.125-inch overall length and a standard 118-degree point angle. The steam oxide coating provides a modest reduction in friction and helps resist corrosion during storage and use. The tapered web with web-thinned geometry reduces thrust at the point, making it suitable for production and maintenance drilling work performed by machinists, pipefitters, and general trade mechanics.

This bit is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The Series R10 designation identifies it as a general-purpose jobber-length design conforming to ANSI standards. Typical applications include structural fabrication shops, mechanical rooms, and field service work where a reliable, straight-shank bit is required for standard-depth through-holes in metallic workpieces.

Key Features

• 17/64 inch diameter with 0.2656 inch straight-cylindrical shank — no adapter required for standard chucks
• 118-degree standard point angle for broad material compatibility
• Steam oxide coating reduces friction and provides basic corrosion resistance
• 2-flute right-hand spiral flute with 2.875-inch flute length and 11xD flute-to-diameter ratio
• Web-thinned, tapered web design lowers drilling thrust at the cutting point
• ANSI-compliant Series R10 construction for consistent dimensional tolerancing

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard 3-jaw drill chuck accepting a 17/64 inch straight-cylindrical shank. Rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces per the manufacturer material code designations P, M, K, N, and S.

Installation Notes

Install into a properly sized drill chuck and tighten securely before use. Secure the workpiece with appropriate clamping or fixturing — never hand-hold metal stock during drilling. Apply cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat buildup and extend bit life. Inspect the cutting edges for wear before each use; a dull bit increases thrust force and can cause workpiece damage or breakage.