Hertel 79891727 Carbide Jobber Drill Bit No. 60

Product Description

The HERTEL 79891727 is a solid carbide jobber-length drill bit sized to No. 60 wire gauge, equivalent to 0.0400 inch diameter. Built from C2-grade carbide, it delivers the hardness and heat resistance needed for drilling non-ferrous metals, plastics, composites, and similar materials where high-speed steel bits wear prematurely. The 118-degree standard point angle provides a reliable, general-purpose cutting geometry. A bright (uncoated) finish keeps the cutting edges sharp and clean right out of the package. The web-thinned, tapered web construction reduces thrust load during entry and helps maintain accuracy in small-diameter drilling applications.

This bit is suited for precision drilling tasks in manufacturing, tool-and-die, electronics assembly, and general machining environments where tight-tolerance small holes are required. With a diameter tolerance of -0.0005 to 0.0000 inch, it holds close sizing for applications where hole quality matters. The straight-cylindrical shank fits standard drill chucks and collets. Right-hand spiral flutes evacuate chips efficiently, reducing the risk of bit walk or breakage in small-diameter work.

Key Features

• Solid carbide C2-grade construction for superior wear resistance over HSS alternatives
• No. 60 wire size, 0.0400 inch diameter with tight tolerance of -0.0005 to 0.0000 inch
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright finish with 2-flute regular spiral for clean chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collets
• 1.5-inch overall length with 0.75-inch flute length for jobber-length applications

Compatibility

Designed for use in standard drill chucks and collets accepting a 0.0400-inch straight-cylindrical shank, suitable for benchtop drill presses, CNC machining centers, and hand-held drilling equipment configured for small-diameter carbide tooling.

Installation Notes

Solid carbide bits are brittle compared to HSS and require rigid, low-runout toolholding to prevent breakage at small diameters. Secure the shank fully in a precision collet or drill chuck before operation. Reduce feed pressure on breakthrough to avoid tip fracture. Do not use this bit in applications with excessive lateral load or in hand-held drilling where bit deflection cannot be controlled.