Precision Twist Drill 5999188 Drill Bit Wire 77 Hss

Product Description

The PRECISION TWIST DRILL 5999188 is a jobber-length drill bit sized to wire gauge No. 77, with a decimal diameter of 0.0180 inches. Made from high-speed steel (HSS) with a steam oxide coating, it is built for general-purpose drilling in production and maintenance environments. The 118-degree standard point angle and web-thinned tip promote accurate entry and reduced thrust. With an overall length of 0.875 inches and a 2-flute spiral design, this bit suits precise, small-diameter drilling work performed by machinists, tool-and-die workers, and maintenance technicians.

This drill bit is designed for use in drilling operations on a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is part of the Series R10-R15-R18 line and conforms to ANSI standards. The straight-cylindrical shank allows for straightforward chuck mounting in standard drill presses, CNC machining centers, and hand-held drilling equipment. Typical applications include pilot holes, through-holes, and precise small-bore work in metal fabrication and assembly.

Key Features

• Wire gauge No. 77 size — 0.0180 inch decimal diameter for precise small-bore drilling
• High-speed steel construction with steam oxide coating for corrosion resistance and reduced friction
• 118-degree standard point angle with web-thinned tip for accurate entry and reduced thrust
• 2-flute regular spiral design with 3/16 inch flute length for efficient chip evacuation
• Straight-cylindrical shank (0.0180 inch diameter) compatible with standard drill chucks
• ANSI-compliant general-purpose grade suitable for steel, cast iron, non-ferrous metals, and superalloys

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard drill chucks and collet systems that accept a 0.0180 inch straight-cylindrical shank, suitable for use in drill presses, CNC machining centers, and hand-held drilling equipment.

Installation Notes

This bit is installed and used by machinists, tool-and-die technicians, and maintenance professionals. Secure the straight shank firmly in a properly sized drill chuck or collet before operation to prevent runout. Ensure the workpiece is clamped or fixtured to avoid movement during drilling. Use appropriate cutting fluid or coolant for the workpiece material when extended drilling cycles are performed, as coolant-through is not supported by this bit geometry.