Hertel 04139093 Cobalt Jobber Drill Bit No 62 0.0380 in

Product Description

The HERTEL 04139093 is a cobalt jobber-length drill bit in wire gauge size No. 62, measuring 0.0380 inches in decimal diameter. It features a 135-degree split point for fast penetration and reduced walking on entry, with a web-thinned, tapered web design that lowers thrust force during drilling. The oxide and TiN coating provides heat resistance and surface hardness for demanding applications. The right-hand spiral flute configuration promotes efficient chip evacuation. With an overall length of 1.5 inches and a flute length of 0.625 inches, this is a precision small-diameter drill suited for use by machinists, pipefitters, and HVAC technicians working with tight-tolerance holemaking tasks.

This drill bit is designed for holemaking in metal and similar materials where a small wire gauge size and cobalt construction are required. The straight-cylindrical shank fits standard drill chucks without adapters. Its heavy-duty grade and cobalt substrate make it appropriate for drilling harder materials such as stainless steel, cast iron, and high-strength alloys. Typical use cases include fabrication shops, service vans, and field installations where precise, small-diameter holes are needed in ferrous and non-ferrous stock.

Key Features

• No. 62 wire gauge size, 0.0380 inches decimal diameter for tight-tolerance applications
• 135-degree split point with web thinning reduces thrust and minimizes bit walking
• Cobalt construction with oxide and TiN coating for extended heat and wear resistance
• Right-hand cut, regular spiral flute for consistent chip evacuation
• Straight-cylindrical shank fits standard chucks without modification
• Heavy-duty grade construction rated for drilling harder ferrous and non-ferrous materials

Compatibility

Designed as a jobber-series small wire gauge drill bit compatible with standard drill chucks and rotary tools accepting a 0.0380-inch straight-cylindrical shank.

Installation Notes

This bit is installed by trade professionals and machinists using standard drill presses, hand drills, or CNC equipment with appropriate collets or chucks. Ensure the workpiece is securely fixtured before drilling to prevent bit deflection or breakage at this small diameter. Use cutting fluid when drilling hardened or stainless materials to manage heat buildup. Do not exceed the recommended RPM range for the diameter and material being drilled.