Precision Twist Drill 5998045 Jobber Drill Bit 17/64

Product Description

The PRECISION TWIST DRILL 5998045 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. It measures 17/64 inches (0.2656 inches) in diameter with a 4.125-inch overall length and a 2.875-inch spiral flute length. The bit is ground from high speed steel and finished with a steam oxide coating that reduces friction and helps resist corrosion during service. A 135-degree split point minimizes walking on entry, making it well suited for production and maintenance drilling where accuracy and speed both matter. Machinists, maintenance techs, and industrial tradespeople are the typical users.

This bit is built for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium — the full range of workpiece material codes P, M, K, N, and S. The straight-cylindrical shank accepts standard three-jaw drill chucks without an adapter. With a flute-to-diameter ratio of 11xD and a tapered web configuration, it handles deeper passes without packing chips. It fits well into both bench drill press and handheld drill driver applications across manufacturing, HVAC fabrication, and mechanical service environments.

Key Features

• 17/64 inch (0.2656 inch) diameter with matching straight-cylindrical shank for direct chuck mounting
• 135-degree standard point angle with web thinning to reduce entry force and bit walking
• High speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Steam oxide finish reduces friction and provides light corrosion resistance
• 2-flute regular spiral design with 2.875-inch maximum drilling depth for jobber-length reach
• Meets ANSI standards and NAS 907 specification; Series R10B-R15B-R18B

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw chuck accepting a 17/64 inch straight-cylindrical shank. Suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium per workpiece material codes P, M, K, N, and S.

Installation Notes

Install and remove this bit only with the drill press or handheld driver powered off and the chuck key fully withdrawn before operation. Secure the shank fully into the chuck jaws and tighten evenly to prevent runout. Use appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to extend bit life and maintain cut quality. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.