Hertel 79891784 Solid Carbide Jobber Drill Bit Wire 55

Product Description

The HERTEL 79891784 is a solid carbide jobber-length drill bit sized to wire gauge 55, equivalent to 0.0520 inches in diameter. Built for high-performance drilling in demanding materials, it features a standard 118-degree point angle, a bright finish, and a web-thinned, tapered web construction that reduces thrust and improves chip flow at the cutting edge. The straight-cylindrical shank measures 0.0520 inches in diameter, matching the bit diameter for secure chuck engagement. With an overall length of 1.5 inches and a flute length of 0.75 inches, this bit is designed for precision small-diameter work where tool rigidity and dimensional accuracy matter. It carries a C2 material grade rating and a tight diameter tolerance of -0.0005 to 0.0000 inches.

This drill bit is suited for metalworking, machining, and light fabrication applications where small wire-gauge holes are required to exact tolerances. It is appropriate for use in CNC machining centers, drill presses, and handheld precision drills. Common applications include tapping pilot holes, precision hole-making in ferrous and non-ferrous metals, and work in aerospace, automotive, and general metalworking environments. Machinists, tool and die makers, and maintenance technicians working with tight-tolerance assemblies are the primary users of this bit.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Wire size 55 (0.0520 inches) with a tolerance of -0.0005 to 0.0000 inches for precise hole sizing
• 118-degree standard point angle for general-purpose drilling
• Web-thinned, tapered web reduces cutting thrust and improves chip evacuation
• Bright finish, regular spiral flute, right-hand cut for standard machine applications
• Straight-cylindrical shank for compatibility with standard drill chucks and collets

Compatibility

Designed as a standard jobber-length solid carbide drill bit for use in drill presses, CNC machining centers, and precision drilling fixtures that accept a straight-cylindrical shank in the 0.0520-inch diameter range.

Installation Notes

Installation and use of this bit should be performed by machinists or qualified trade personnel familiar with carbide tooling. Secure the straight-cylindrical shank firmly in a precision collet or drill chuck rated for the spindle speed being used, as carbide bits are brittle and sensitive to side-loading or impact. Always verify spindle speed and feed rate are appropriate for the workpiece material before engaging the cut. Inspect the cutting edge before each use, as solid carbide will chip rather than bend if damaged.