Precision Twist Drill 5999192 Jobber Drill Bit Wire 8

Product Description

The PRECISION TWIST DRILL 5999192 is a jobber-length drill bit sized to wire gauge number 8 (0.1990 inches decimal equivalent), manufactured from high speed steel with a steam oxide coating. It features a standard 118-degree split point, a regular spiral flute, and a straight-cylindrical shank. With an overall length of 3.625 inches and a flute length of 2.4375 inches, this bit is engineered for general-purpose drilling in a wide range of materials. It is installed and used by machinists, maintenance technicians, pipefitters, and other trades requiring precise hole generation in metal workpieces.

This bit is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The 12xD flute-to-diameter ratio provides adequate chip evacuation in typical production and maintenance drilling scenarios. It is a single-quantity item appropriate for tool crib stocking, field service kits, or bench use where a wire gauge number 8 diameter hole is required. The straight-cylindrical shank seats in standard 3-jaw drill chucks on corded drills, drill presses, and CNC drilling equipment.

Key Features

• Wire gauge number 8 size, 0.1990 inches decimal equivalent diameter
• 118-degree standard drill point angle with web-thinned, tapered web construction
• Steam oxide coating helps reduce friction and provides light corrosion resistance during storage
• Regular right-hand spiral flute with 2.4375-inch maximum drilling depth
• Straight-cylindrical shank, 0.1990 inches diameter, compatible with standard drill chucks
• Conforms to ANSI standards; Series R10-R15-R18 general-purpose classification

Compatibility

Designed as an OEM-style general-purpose jobber drill bit for use in standard 3-jaw drill chucks and compatible drilling equipment requiring a wire gauge number 8 straight-shank bit.

Installation Notes

Install in a properly sized 3-jaw drill chuck and verify chuck is fully tightened before operation. Ensure the workpiece is securely clamped or fixtured to prevent rotation during drilling. Apply appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat buildup and extend bit life. Inspect the cutting edges for wear or chipping before each use; a damaged point will affect hole quality and can cause bit breakage.