Precision Twist Drill 5998857 Jobber Drill Bit Letter G

Product Description

The PRECISION TWIST DRILL 5998857 is a jobber-length drill bit sized to letter G (0.2610 inches), designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a bright, uncoated finish, this bit features a standard 118-degree point angle and a regular spiral flute configuration. The straight-cylindrical shank accepts standard drill chucks without adapters. With an overall length of 4.125 inches and a two-flute, right-hand cut design, this bit is a go-to for licensed machinists, maintenance technicians, pipefitters, and general tradespeople who need reliable performance in everyday drilling operations.

This drill bit is suited for use in residential, commercial, and light industrial settings. It drills effectively in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The web-thinned, tapered web construction reduces entry resistance and improves chip clearance in deep-hole applications. Typical uses include hole preparation for fasteners, pipe fittings, and electrical conduit anchors. The 2.875-inch flute length supports a maximum drilling depth of 2.875 inches, making it appropriate for through-hole work in standard structural stock.

Key Features

• Letter G size: 0.2610 inches decimal equivalent
• 118-degree standard point angle for general-purpose entry in metals
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Bright uncoated finish — no coating buildup to interfere with tight-tolerance holes
• Web-thinned, tapered web reduces thrust and improves chip evacuation
• Right-hand cut, regular spiral flute with straight-cylindrical shank for universal chuck compatibility
• Conforms to ANSI standards; Series R10P-R15P-R18P

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck accepting a 0.2610-inch straight-cylindrical shank. Suitable for use with benchtop drill presses, hand drills, and CNC drilling equipment configured for straight-shank tooling.

Installation Notes

Installation is performed by machinists, maintenance technicians, or qualified tradespeople using a drill press, hand drill, or CNC machine. Secure the shank fully in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before operation. Reduce feed rate when drilling hard materials such as stainless steel or titanium to extend tool life and prevent work hardening.