Precision Twist Drill 5998297 Jobber Drill Bit 13 Hss

Product Description

The PRECISION TWIST DRILL 5998297 is a jobber-length drill bit designed for general-purpose drilling in a wide range of metalworking applications. Manufactured from high speed steel with a steam oxide coating, this bit handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It carries a wire size designation of 13, corresponding to a decimal diameter of 0.185 inches. The 118-degree standard point angle and web-thinned, tapered web construction promote clean entry and reduced thrust. Overall length is 3.5 inches with a 2.3125-inch flute length and a straight-cylindrical shank. Licensed HVAC techs, machinists, plumbers, and electricians alike reach for bits like this when drilling pilot, clearance, or tap-prep holes in ferrous and non-ferrous materials.

This bit is well suited for production and maintenance drilling in residential and commercial trade environments. The Series R18 designation places it within the R10-R15-R18 family, built to ANSI standards for consistent geometry and interchangeability. The two-spiral flutes in a regular helix promote chip evacuation during drilling, making the bit reliable for through-hole and blind-hole work in metal fabrication, HVAC equipment installation, electrical panel work, and plumbing rough-in tasks where precise hole sizing is required. Flute-by-diameter ratio is 13xD, offering good reach relative to bit diameter.

Key Features

• Wire size 13 (0.185 inch decimal diameter) straight-cylindrical shank for standard chuck compatibility
• High speed steel construction with steam oxide coating for corrosion resistance and reduced friction
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Two spiral flutes in regular helix pattern promote efficient chip removal
• Right-hand cut with 2.3125-inch maximum drilling depth
• Built to ANSI standards; Series R10-R15-R18 designation

Compatibility

Designed for general-purpose drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Compatible with any standard drill chuck accepting a 0.185-inch straight-cylindrical shank.

Installation Notes

Install in a drill press, hand drill, or driver with a chuck rated for the 0.185-inch shank diameter. Secure the workpiece before drilling to prevent rotation and ensure consistent hole geometry. Use cutting fluid or coolant on harder materials such as stainless steel and titanium to manage heat buildup, even though coolant-through is not available on this bit. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed to maintain hole accuracy.