Chicago-latrobe 46016 Drill Bit Letter E 1/4 Inch Hss

Product Description

The CHICAGO-LATROBE 46016 is a jobber-length twist drill bit sized at Letter E, equivalent to 0.2500 inches (1/4 inch) in diameter. It is manufactured from high speed steel with a bright, uncoated finish and features a 118-degree standard point angle with a web-thinned, tapered web for easier entry into the workpiece. The spiral flute design is a fast-spiral configuration, improving chip evacuation during drilling. Rated for general-purpose use, this bit is suited for drilling steel and similar materials in shop, field, and production environments. HVAC techs, plumbers, electricians, and fabricators regularly reach for jobber-length bits like this for everyday hole-making tasks.

The 46016 is designed for general-purpose drilling in steel and compatible materials. At 4 inches overall length with a 2-3/4-inch flute length and a 1/4-inch straight cylindrical shank, it fits standard 1/4-inch chucks and quick-change drill systems common on portable drills and drill presses. The right-hand cutting direction makes it compatible with all standard corded and cordless drills. It is well suited for trade professionals who need a reliable, no-frills jobber bit for conduit knockouts, pipe flanges, sheet metal, and general structural work.

Key Features

• Letter E size, 0.2500 inches diameter, with a diameter tolerance of -0.0007 to 0.0000 inches for precise hole sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and improved starting
• Fast-spiral flute design improves chip removal and reduces heat buildup during drilling
• High speed steel construction with bright, uncoated finish suitable for general-purpose steel drilling
• 1/4-inch straight cylindrical shank fits standard chucks and quick-change systems
• Right-hand cut, 2-flute configuration — Series 150B general purpose grade

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard 1/4-inch chuck on portable drills, drill presses, or drill press vises. Intended primary workpiece material is steel.

Installation Notes

Jobber-length drill bits are installed and removed by licensed tradespeople and general users using standard keyed or keyless chucks — ensure the shank is fully seated and the chuck is firmly tightened before operation. Always wear appropriate eye protection and secure the workpiece before drilling. For drilling steel, use a center punch to prevent bit walk at the start point. Replace the bit if the cutting edges show visible wear or the bit wanders during use.