Precision Twist Drill 5998206 Jobber Drill Bit 12 Hss

Product Description

The PRECISION TWIST DRILL 5998206 is a jobber-length, high speed steel drill bit sized to wire gauge 12, with a decimal diameter of 0.1890 inches. It features a standard 118-degree split-point angle and a bright, uncoated finish suitable for general-purpose drilling in metal fabrication and maintenance applications. The spiral flute geometry and web-thinned tip reduce thrust and improve chip evacuation. With an overall length of 3.5 inches and a flute length of 2.3125 inches, this bit fits standard drill chucks via its straight-cylindrical shank. Licensed trades and machinists reach for this size in production and repair work across steel, cast iron, non-ferrous metals, and superalloys.

This drill bit is appropriate for use in hand-held electric drills, drill presses, and CNC drilling operations where a wire gauge 12 hole is required. It covers a drilling depth up to 2.3125 inches and is manufactured to ANSI standards under the R10H-R18H series designation. Typical applications include through-hole drilling in sheet metal, structural steel, and non-ferrous stock in industrial, HVAC fabrication, plumbing rough-in, and electrical panel work environments.

Key Features

• Wire gauge 12 diameter — 0.1890 inches decimal for precise sizing
• 118-degree standard point angle with web-thinned tip for reduced entry thrust
• High speed steel construction handles steel, cast iron, non-ferrous metals, and superalloys
• Bright uncoated finish for easy visual wear inspection
• Regular spiral, 2-flute design promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose OEM-style jobber drill bit compatible with any standard drill chuck accepting a 0.1890-inch straight-cylindrical shank, conforming to ANSI specification for wire gauge 12 jobber-length bits.

Installation Notes

Installation is performed by licensed machinists, electricians, HVAC technicians, or plumbers using a handheld drill or drill press. Secure the workpiece before drilling and confirm chuck tightness to prevent bit slippage. Always wear appropriate eye protection and follow applicable OSHA safety standards when drilling metal. Do not exceed the recommended drilling depth of 2.3125 inches for this bit length.