Precision Twist Drill 5999172 Jobber Drill Bit 7 Hss

Product Description

The PRECISION TWIST DRILL 5999172 is a jobber-length, high-speed steel drill bit sized to wire gauge 7, with a decimal diameter of 0.2010 inches. It features a standard 118-degree split point with web thinning and a tapered web configuration for improved centering and reduced thrust on entry. The steam oxide coating provides light corrosion resistance and helps reduce friction during the cut. At 3.625 inches overall length with a 2.4375-inch flute, this is a general-purpose drilling tool suited for shop and field use by machinists, maintenance technicians, and industrial tradespeople.

This drill bit is designed for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It follows a regular spiral flute geometry with a 12xD flute-to-diameter ratio, right-hand cut, and a straight-cylindrical shank of 0.2010 inches diameter. It is part of the Series R18 line and conforms to ANSI standards, making it appropriate for general-purpose production drilling and maintenance drilling operations in metalworking environments.

Key Features

• Wire size 7 (0.2010 inches) straight-cylindrical shank for use in standard drill chucks
• 118-degree standard point angle with web thinning for reduced entry thrust
• Steam oxide finish for light corrosion resistance and reduced friction
• 2-flute regular spiral design with 2.4375-inch maximum drilling depth
• Right-hand cut, general-purpose geometry rated for steel, stainless, cast iron, and non-ferrous metals
• ANSI-compliant construction in the R18 series

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks, drill presses, and CNC drilling applications where a wire gauge 7 diameter hole is required in metallic workpiece materials.

Installation Notes

This bit is installed by machinists and maintenance technicians in manual or power-driven drilling equipment. Before changing bits, ensure the drill press or handheld drill is fully powered down and the chuck is released. Use appropriate cutting fluid or coolant on stainless steel and hard materials to extend tool life, noting this bit does not support coolant-through operation. Secure the workpiece firmly before drilling to prevent bit deflection or breakage.