Chicago-latrobe 57224 3/8 Inch Hss Jobber Drill Bit

Product Description

The CHICAGO-LATROBE 57224 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and composite materials. Built from high speed steel with an oxide finish, it measures 3/8 inch (0.3750 inches) in diameter with a 118-degree split point that helps the bit self-center on contact and reduces walking on flat surfaces. Overall length is 5 inches with a flute length of 3-5/8 inches. The straight cylindrical shank measures 0.3750 inches in diameter and 1.375 inches in length. This bit is a standard tool-crib staple installed by machinists, pipefitters, HVAC technicians, and electricians drilling pilot and clearance holes during rough-in and fabrication work.

The 57224 fits standard 3-jaw drill chucks on corded and cordless drills, drill presses, and right-angle drill drives. Its regular spiral flute and 2-flute configuration suit drilling in magnesium alloy, mild steel, aluminum, and similar materials at moderate feed rates. The Series 150K designation places it in Chicago-Latrobe's general-purpose line. No coolant-through capability is present, so flood or mist coolant must be applied externally if needed for higher-heat applications.

Key Features

• 118-degree split point reduces walking and improves self-centering on metal surfaces
• High speed steel construction with oxide finish for corrosion resistance and reduced friction
• Regular spiral, 2-flute design promotes efficient chip evacuation during through-drilling
• Web-thinned, tapered web configuration reduces thrust force requirements
• Right-hand cut with straight cylindrical shank fits standard 3-jaw chuck systems
• Jobber-length format balances reach and rigidity for general drilling tasks

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard 3-jaw drill chuck or drill press accepting a 3/8-inch straight cylindrical shank. Suited for drilling magnesium alloy and similar non-ferrous and ferrous metals per the manufacturer specification.

Installation Notes

A licensed machinist or qualified tradesperson should secure the bit firmly in a properly sized drill chuck before operation, ensuring zero runout before drilling begins. Always power down the drill or press and disconnect it from the power source before changing bits. Use appropriate cutting fluid or external coolant when drilling ferrous metals to extend bit life. Eye protection and proper workpiece clamping are required per standard shop safety practice.