Hertel 79892188 Solid Carbide Jobber Drill Bit No. 24

Product Description

The HERTEL 79892188 is a solid carbide jobber-length drill bit sized to wire gauge No. 24, with a decimal diameter of 0.1520 inches and an overall length of 2.5 inches. The bit features a standard 118-degree split point with web thinning for improved penetration and reduced thrust on entry. Solid carbide construction at C2 material grade delivers hardness and wear resistance suited to high-performance drilling in ferrous and non-ferrous materials. The bright finish leaves the carbide substrate exposed for direct heat observation during cutting. Right-hand spiral flutes evacuate chips efficiently throughout the 1.375-inch flute length. Licensed machinists, tool-and-die technicians, and precision metalworkers are the primary installers of this bit.

This bit is designed for precision drilling in production machining, toolmaking, and maintenance-repair-overhaul environments where tight dimensional tolerances are required. The 0.1520-inch diameter with a tolerance band of -0.0005 to 0.0000 inches makes it suitable for close-tolerance hole applications such as tap pilot holes, dowel pin prep, and instrument-grade bore work. The straight-cylindrical shank seats directly into standard drill chucks and collets without adapters. The regular spiral type and tapered web configuration keep the bit stable in both manual and CNC-guided operations.

Key Features

• Solid carbide C2 grade construction for hardness and extended tool life
• No. 24 wire size, 0.1520-inch decimal diameter with tolerance of -0.0005 to 0.0000 inches
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright finish solid carbide substrate, no coating to mask wear indicators
• 1.375-inch flute length with regular right-hand spiral for reliable chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and precision collets

Compatibility

Designed as a jobber-length replacement or production-use drill bit for any standard drill chuck or collet accepting a 0.1520-inch straight-cylindrical shank. No specific model compatibility was stated in the product data.

Installation Notes

This bit is installed by machinists and precision metalworking technicians in drill presses, milling machines, or CNC machining centers equipped with appropriate chuck or collet toolholding. Ensure the shank is fully seated and the chuck or collet is torqued to the equipment specification before operation. Carbide is brittle relative to high-speed steel — avoid side loading, prying, or interrupted cuts that can cause chipping or fracture. Verify spindle runout is within tolerance before use to protect the close-diameter tolerance of the bit.