Precision Twist Drill 5998309 Drill Bit Wire 16 Hss

Product Description

The PRECISION TWIST DRILL 5998309 is a jobber-length twist drill bit sized to wire gauge 16 (0.1770 inches decimal), ground from high speed steel and finished with a steam oxide coating for light corrosion resistance during storage and initial cuts. The bit features a standard 118-degree split point, two spiral flutes with a regular helix, and a web-thinned tip geometry that reduces thrust force on entry. Overall length is 3.375 inches with a flute length of 2.1875 inches, providing a 12xD depth-to-diameter ratio suitable for most through-hole and blind-hole drilling operations. Licensed HVAC techs, plumbers, electricians, and general trade mechanics routinely carry jobber-length bits in this size range for sheet metal, structural steel, and mechanical assembly work.

This bit is rated for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The straight-cylindrical shank at 0.1770 inches diameter seats directly in standard keyed or keyless drill chucks without adapters. It is cataloged under Series R10-R15-R18 and conforms to ANSI standards, making it a general-purpose selection for production drilling and maintenance applications across residential, commercial, and light industrial settings.

Key Features

• Wire size 16 (0.1770 inches) with matching straight-cylindrical shank for precise chuck fit
• 118-degree standard point angle with web-thinned tip reduces entry thrust
• Steam oxide coating provides light lubricity and rust resistance during use
• Two spiral flutes, regular helix, tapered web construction for efficient chip evacuation
• ANSI-compliant jobber length: 3.375 inches OAL, 2.1875 inches flute length
• Right-hand cut, general-purpose grade suitable for steel, cast iron, non-ferrous metals, and superalloys

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard keyed or keyless drill chuck accepting a 0.1770-inch straight-cylindrical shank, including handheld drills, drill presses, and milling machine setups used across trade and light industrial applications.

Installation Notes

Installation and use should be performed by qualified tradespeople following applicable shop safety and electrical safety protocols. Secure the workpiece firmly before drilling and verify chuck grip before powering the tool. Allow the bit to cool between extended drilling cycles in hard materials to preserve temper; do not quench a hot high speed steel bit in water. Inspect the cutting edges and web for wear before each use and replace when point geometry is compromised.