Precision Twist Drill 5998716 Jobber Drill Bit 29/64 in

Product Description

The PRECISION TWIST DRILL 5998716 is a jobber-length twist drill bit designed for general-purpose drilling in metal and hard materials. It measures 29/64 inches (0.4531 inches) in diameter with a 118-degree standard point angle and a two-flute right-hand spiral configuration. The bit carries a steam oxide coating over a high speed steel (HSS) body, which reduces friction and provides moderate corrosion resistance during cutting operations. Overall length is 5.625 inches with a flute length of 4.1875 inches. The straight-cylindrical shank matches the drill diameter at 0.4531 inches, making it compatible with standard drill chucks. Licensed HVAC techs, plumbers, machinists, and general trade workers use this bit for production and maintenance drilling tasks.

This Series R10 jobber drill bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It fits general shop and field use where a reliable, standard-geometry HSS bit is required. The web-thinned, tapered web design reduces feed force at entry, which is useful when drilling harder or tougher alloys. Maximum drilling depth matches the flute length at 4.1875 inches. The bit conforms to ANSI standards and falls within the 0.4000 to 0.5000 inch drill size range category.

Key Features

• 29/64 inch (0.4531 inch) diameter with matching straight-cylindrical shank for secure chuck grip
• 118-degree standard point angle suited for general-purpose metal drilling
• Steam oxide coating reduces friction and provides light surface protection
• Web-thinned tapered web lowers entry feed force on harder workpiece materials
• Two-flute right-hand spiral with regular helix for efficient chip evacuation
• ANSI-compliant Series R10 construction for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard 3-jaw drill chucks and compatible drilling equipment. Suitable for workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium as noted in the product specifications.

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, and trade professionals using standard drill presses, hand drills, or CNC drilling equipment. Always secure the workpiece before drilling and confirm the chuck is fully tightened around the straight-cylindrical shank. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend tool life, noting that this bit does not support internal coolant-through delivery. Inspect the cutting edges for wear before each use and replace the bit when point geometry degrades to avoid workpiece damage or tool breakage.