Chicago-latrobe 77661 Carbide Tipped Jobber Drill 3/8 in

Product Description

The CHICAGO-LATROBE 77661 is a carbide-tipped jobber-length drill bit designed for general-purpose drilling in a wide range of materials. It features a 3/8 inch (0.3750 inch) diameter with a standard 118-degree point angle and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation at the start of the cut. The bright, uncoated finish suits applications where coating compatibility with the workpiece material is a concern. At 5.0 inches overall length with a 3.625 inch flute, this bit fits standard drill chucks and magnetic drill presses used by trade professionals daily.

This jobber drill bit is suited for metal fabrication, mechanical contracting, and maintenance work across industrial and commercial jobsites. The straight cylindrical shank accepts standard three-jaw drill chucks. The right-hand, regular spiral flute geometry handles steel, cast iron, non-ferrous metals, and similar materials where a carbide-tipped edge outlasts standard high-speed steel in abrasive or interrupted-cut conditions. It is a single-piece unit packaged individually, making it a direct replacement or add-to-kit option for trade toolboxes.

Key Features

• Carbide-tipped cutting edge for extended tool life in abrasive and hard materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright, uncoated finish — no coating interaction with workpiece materials
• Right-hand, regular spiral flute for efficient chip clearance
• Straight cylindrical 3/8 inch shank fits standard drill chucks without an adapter
• Diameter tolerance of +0.0000 to -0.0010 inches for consistent hole sizing

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck accepting a 3/8 inch straight cylindrical shank, including benchtop drill presses, hand drills, and magnetic base drills.

Installation Notes

Installation is performed by machinists, millwrights, pipefitters, and general trade mechanics. Secure the straight shank firmly in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before beginning a cut. Follow applicable OSHA and facility safety standards for rotating cutting tools, and never exceed the rated speed range for the drill press or hand tool in use.