Hertel 79891750 Solid Carbide Jobber Drill Bit Wire 57

Product Description

The HERTEL 79891750 is a solid carbide jobber-length drill bit in wire gauge size 57, equivalent to 0.0430 inches in diameter. Built to a 118-degree standard point angle with web thinning and a tapered web configuration, this bit is designed for precise entry and efficient chip evacuation in small-diameter drilling applications. The bright finish leaves the carbide surface uncoated, which suits applications where coating buildup at small diameters would negatively affect tolerance. At 1.5 inches overall length with a 0.75-inch flute length, this is a compact, rigid tool well-suited to close-tolerance work. It carries a C2 material grade rating and is classified as high-performance by the manufacturer.

This bit is used in metalworking, toolroom, and precision machining environments where small-diameter holes demand tight dimensional control. The straight-cylindrical shank seats directly into standard drill chucks, collets, or CNC spindles without adapters. Diameter tolerance is held at -0.0005 to 0.0000 inches, making it appropriate for production drilling in ferrous and non-ferrous metals, printed circuit board work, and precision fixture fabrication. It is sold and packaged individually.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter drilling
• Wire size 57 diameter — 0.0430 inches — with tolerance held to -0.0005 to 0.0000 inches
• 118-degree standard point angle with web thinning for clean entry and reduced thrust
• Regular spiral, two-flute design promotes chip evacuation in blind and through holes
• Bright finish — no coating — preserves dimensional accuracy at this diameter
• Straight-cylindrical shank fits standard chucks and collets without adapters

Compatibility

Designed as a direct-fit replacement or standard toolroom addition for any drill press, hand drill, or CNC machining center equipped with a chuck or collet accepting a 0.0430-inch straight-cylindrical shank.

Installation Notes

Secure the shank fully in the collet or drill chuck before operation and verify runout before production drilling at this diameter. At 0.0430 inches, feed rate and spindle speed must be dialed to manufacturer recommendations for the workpiece material to avoid bit breakage. Do not apply excessive side load. For CNC applications, confirm spindle concentricity before setting depth stops.