Precision Twist Drill 5999165 Drill Bit Wire 38 Hss

Product Description

The PRECISION TWIST DRILL 5999165 is a jobber-length drill bit sized to wire gauge 38, equivalent to 0.1015 inches in diameter. Built from high speed steel with a steam oxide coating, it is designed for general-purpose drilling in demanding shop and field environments. The 135-degree split point reduces walking on hard surfaces and lowers the thrust required to start a hole. With an overall length of 2.5 inches and a 1.4375-inch spiral flute, this bit delivers controlled chip evacuation in a compact form factor. It is a standard choice for machinists, HVAC techs, and maintenance tradespeople who need consistent performance in small-diameter drilling.

This drill bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its NAS 907 specification and ANSI compliance make it appropriate for aerospace-adjacent and industrial maintenance applications. The web-thinned, tapered-web construction reduces cutting resistance, making it practical for production drilling or repetitive hole work in hard materials. The straight-cylindrical shank seats cleanly in standard 3-jaw chucks and keyless drill chucks used across trades.

Key Features

• Wire size 38 (0.1015 inches) with a matching straight-cylindrical shank diameter of 0.1015 inches for true concentricity
• 135-degree standard point angle with web thinning for reduced thrust and clean entry without a center punch on most materials
• Steam oxide coating provides mild lubricity and surface hardness for extended tool life in ferrous materials
• Regular spiral, 2-flute design with a 14xD flute-to-diameter ratio promotes efficient chip clearing in deep holes
• Meets NAS 907 and ANSI standards, suitable for aerospace maintenance and industrial production use
• Heavy-duty drill bit grade rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium

Compatibility

Designed as an OEM-compatible jobber-length drill bit for use in any standard drill chuck accepting a 0.1015-inch straight-cylindrical shank, compatible with drill presses, hand drills, and CNC equipment across the R10B, R15B, and R18B series applications.

Installation Notes

This bit is installed by a machinist, maintenance technician, or qualified tradesperson using a standard 3-jaw or keyless chuck. Secure the shank fully in the chuck before operation and verify concentricity at speed before cutting. For ferrous materials, use a cutting fluid or oil to reduce heat buildup and extend bit life. Inspect the cutting edges for wear or chipping before each use and replace bits that show signs of dulling to avoid oversized holes or workpiece damage.