Precision Twist Drill 5999127 Jobber Drill Bit 58 Hss

Product Description

The PRECISION TWIST DRILL 5999127 is a jobber length drill bit in wire gauge size 58, with a decimal diameter of 0.0420 inches. Manufactured from high speed steel with a steam oxide coating, it is designed for general purpose drilling across a wide range of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The bit features a standard 118-degree point angle, a two-flute spiral configuration, and a web-thinned tapered web for improved chip evacuation. Overall length is 1.625 inches. Licensed tradespeople and machinists install these bits in standard drill chucks for precision hole work in fabrication, maintenance, and repair applications.

This drill bit is suited for production and maintenance drilling in metalworking environments where small-diameter, tight-tolerance holes are required. The straight-cylindrical shank fits standard drill chucks without modification. The regular spiral flute geometry and 118-degree point make it appropriate for general purpose work on steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It belongs to Series R10-R15-R18 and conforms to ANSI standards, making it a reliable choice for shops that stock to specification.

Key Features

• Wire gauge size 58 with a decimal diameter of 0.0420 inches for tight-tolerance small-hole work
• High speed steel construction with steam oxide coating for wear resistance on ferrous and non-ferrous materials
• 118-degree standard point angle for general purpose drilling across multiple material types
• Web-thinned tapered web reduces thrust and improves chip clearance at the cutting tip
• Two-flute regular spiral design with a flute length of 0.6875 inches (11/16 inch) and maximum drilling depth of 0.6875 inches
• Straight-cylindrical shank diameter of 0.0420 inches fits standard drill chucks; conforms to ANSI specification

Compatibility

Designed as an OEM-style general purpose jobber length drill bit conforming to ANSI standards, suitable for use in standard drill chucks and drill presses rated for small-diameter wire gauge bits in the 0.0000 to 0.0500 inch diameter range.

Installation Notes

Installation is performed by machinists, toolroom technicians, and maintenance trades using standard drill chucks or collet holders rated for the shank diameter. Ensure the drill press or hand drill is powered off and secured before changing bits. Verify chuck jaw condition and clamping force to prevent slippage on the small-diameter straight shank. Do not exceed the maximum drilling depth of 0.6875 inches without retracting to clear chips.