Precision Twist Drill 5998293 Jobber Drill Bit Wire 12

Product Description

The PRECISION TWIST DRILL 5998293 is a jobber-length drill bit in wire gauge size 12, equivalent to 0.1890 inches in diameter. Built from high speed steel with a steam oxide coating, it delivers consistent performance in general-purpose drilling applications. The standard 118-degree split-point geometry and web-thinned tip reduce walking and cutting resistance at the start of the hole. With an overall length of 3.5 inches and a 2-5/16-inch spiral flute, this bit suits machinists, maintenance technicians, and fabricators working in production or repair environments.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The Series R18 designation places it in PRECISION TWIST DRILL's standard jobber-length line, designed for general-purpose through-hole and blind-hole work in manual drill presses, CNC machining centers, and hand-held power tools. Maximum drilling depth is 2-5/16 inches. The straight-cylindrical shank diameter of 0.1890 inches fits standard 3-jaw drill chucks without adapters.

Key Features

• Wire gauge size 12 at 0.1890 inches diameter with a matching straight-cylindrical shank
• 118-degree standard point angle with web-thinned tip for reduced thrust and easier starting
• High speed steel construction with steam oxide finish for lubricity and corrosion resistance
• Regular spiral, 2-flute design for efficient chip evacuation in a wide range of materials
• Tapered web configuration for rigidity across the full 2-5/16-inch flute length
• Meets ANSI standards; compatible with ISO material groups P, M, K, N, and S

Compatibility

Designed as an OEM-style general-purpose jobber-length drill bit suitable for use in standard 3-jaw drill chucks accepting a 0.1890-inch straight-cylindrical shank across manual and CNC drilling equipment.

Installation Notes

Installation is performed by machinists, maintenance technicians, or fabricators using standard drill chuck tooling. Secure the straight-cylindrical shank fully in the chuck jaws before operation and verify runout before drilling into workpiece material. Power down or de-energize the drill press or machine spindle completely before changing bits. Do not exceed the maximum drilling depth of 2-5/16 inches in a single pass without retracting the bit to clear chips.