Precision Twist Drill 5999206 Jobber Drill Bit No. 12

Product Description

The PRECISION TWIST DRILL 5999206 is a jobber-length drill bit sized to No. 12 wire gauge (0.1890 inches decimal equivalent) with a 118-degree standard point angle. Manufactured from high-speed steel with a bright, uncoated finish, this bit delivers general-purpose drilling performance on a wide range of metallic materials. The spiral flute geometry and web-thinned, tapered web design promote chip evacuation and reduce thrust during entry. Overall length is 3.5 inches, with a 2-5/16-inch flute length and a straight-cylindrical shank. Right-hand cut orientation is standard. This bit is suited for use with standard drill presses, hand drills, and CNC drilling setups in shop and field environments.

This jobber-length bit is intended for production and maintenance drilling in metalworking, fabrication, and mechanical service applications. It is well-suited to ferrous and non-ferrous base metals including steel, stainless steel, cast iron, non-ferrous metal, superalloys, and titanium. The 12xD flute-to-diameter ratio and 2-5/16-inch maximum drilling depth make it appropriate for through-hole and blind-hole work in standard stock thickness. PRECISION TWIST DRILL Series R18P designation applies. Packaged individually; sold in multiples of 12.

Key Features

• No. 12 wire gauge size — 0.1890 inches decimal equivalent
• 118-degree standard point angle for general-purpose entry geometry
• High-speed steel construction with bright, uncoated finish
• 2-flute spiral design with right-hand cutting direction
• Web-thinned, tapered web reduces drilling thrust and improves chip flow
• Straight-cylindrical shank compatible with standard drill chucks
• Compliant with ANSI specification standards

Compatibility

Designed as a general-purpose replacement or production jobber-length drill bit compatible with standard 3-jaw drill chucks accepting straight-cylindrical shanks of 0.1890 inches diameter. Suitable for use in handheld drills, drill presses, and CNC drilling machines configured for right-hand rotation.

Installation Notes

Installation and use should be performed by machinists, tool-and-die technicians, or qualified mechanical tradespeople familiar with rotating cutting tools. Secure the shank fully in the chuck and confirm concentricity before drilling. Always reduce feed rate when breaking through material to prevent bit walk or grab. Do not exceed the rated maximum drilling depth of 2-5/16 inches in a single pass without retracting to clear chips.