Precision Twist Drill 5998366 Jobber Drill Bit No 31

Product Description

The PRECISION TWIST DRILL 5998366 is a jobber-length twist drill bit designed for general-purpose hole-making in metal and other hard materials. The bit is manufactured from high speed steel with a steam oxide coating that helps reduce friction and provides light corrosion resistance during use. It carries a No. 31 wire gauge designation corresponding to a decimal diameter of 0.1200 inches. The 118-degree standard point angle suits a wide range of common drilling applications. With an overall length of 2.75 inches and a 2-flute spiral configuration, this bit is suited for use by machinists, maintenance technicians, and metal fabricators working with drill presses or hand-held power tools.

This drill bit is intended for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It fits standard jobber-length drilling applications in both production and maintenance environments. The straight cylindrical shank accepts standard drill chucks without adapters. The regular spiral and tapered web construction with web thinning support efficient chip evacuation and reduced thrust in typical through-hole and blind-hole operations.

Key Features

• No. 31 wire size with 0.1200 inch decimal diameter for precise hole sizing
• High speed steel construction provides durability across a broad range of metal workpieces
• Steam oxide coating reduces surface friction and provides light corrosion resistance
• 118-degree standard point angle for general-purpose metal drilling
• Web-thinned, tapered web design reduces drilling thrust and improves chip flow
• Right-hand cut, 2-flute spiral configuration compatible with standard drill chucks

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks on drill presses and portable power tools. Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Part of the Series R10-R15-R18 product family conforming to ANSI standards.

Installation Notes

Installation is performed by machinists, toolroom technicians, or maintenance professionals using standard drill press or hand-tool equipment. Secure the straight cylindrical shank fully in a properly sized drill chuck before operation. Power down the machine and confirm the chuck is locked before changing bits. Do not exceed the recommended maximum drilling depth of 1.625 inches for this bit size.