Hertel 79892832 Solid Carbide Jobber Drill Bit 31/64 in

Product Description

The HERTEL 79892832 is a solid carbide jobber-length drill bit designed for precision drilling in demanding production and machining environments. Ground to a 118-degree standard point angle with web thinning applied, this bit delivers clean entry and reduced thrust force on startup. At 31/64 inch (0.4844 inch) diameter with a tight diameter tolerance of -0.0005 to 0.0000 inches, it holds close sizing for applications where hole accuracy matters. The bright (uncoated) finish suits general-purpose carbide drilling. Licensed machinists, tool and die makers, and production drilling operations are the primary users of this type of bit.

This bit is suited for use in CNC machining centers, drill presses, and production floor applications where solid carbide is selected over high-speed steel for harder workpiece materials or longer run life. The straight cylindrical shank at 31/64 inch diameter seats directly into standard drill chucks and collet systems without modification. With a 3-inch flute length and 4.75-inch overall length, it fits standard jobber-length toolholding setups in both vertical and horizontal drilling configurations. The C2 material grade positions this bit for general carbide-grade machining work on cast iron, aluminum, and similar materials.

Key Features

• Solid carbide construction at C2 grade for extended tool life in production drilling
• 118-degree standard point angle with web thinning for reduced entry thrust
• Tapered web configuration supports chip clearance and bit stability
• Bright finish — no coating — compatible with coolant-off dry drilling setups
• Right-hand cut, regular spiral flute for standard chip evacuation
• Diameter tolerance of -0.0005 to 0.0000 inches for consistent hole sizing

Compatibility

Designed as an OEM-compatible jobber-length drill bit for use in standard drill chucks and collet toolholding systems that accept a 31/64-inch straight cylindrical shank.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists familiar with speeds, feeds, and rigidity requirements for carbide tooling. Secure the shank fully in the chuck or collet before operation and verify runout before beginning a production run. Carbide is brittle compared to high-speed steel — avoid interrupted cuts or side loading that can cause chipping or fracture. Do not use coolant-through settings on this bit, as it is not designed for internal coolant delivery.