Hertel 79891859 Jobber Drill Bit Wire 49 Solid Carbide

Product Description

The HERTEL 79891859 is a jobber-length drill bit designed for precision drilling in demanding applications. Built from solid carbide grade C2, it delivers the hardness and heat resistance required for drilling hard alloys, composites, and other difficult materials. The bit is wire gauge size 49, measuring 0.0730 inches in diameter, with a standard 118-degree point angle and a web-thinned, tapered web configuration that reduces thrust at entry and promotes clean hole starts. The bright finish leaves the carbide surface uncoated for direct contact performance. Installed by machinists and trade professionals working in metal fabrication, aerospace component work, and precision tooling environments.

This bit is suited for applications requiring tight-tolerance holes in the 0.0500 to 0.1000 inch diameter range. The 7/8-inch flute length accommodates typical jobber-depth passes, and the straight-cylindrical shank fits standard drill chucks across benchtop drill presses, CNC machines, and hand-held electric drills. Right-hand spiral flutes evacuate chips efficiently without coolant-through capability, making it well matched to dry or externally lubricated setups in light production and maintenance drilling.

Key Features

• Solid carbide C2 grade construction for high-performance drilling in hard and abrasive materials
• Wire size 49 (0.0730 inches) diameter with tight tolerance of -0.0005 to 0.0000 inches
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright finish with 2 regular spiral flutes for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Overall length of 1.75 inches with a 7/8-inch flute length for jobber-depth drilling

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for applications requiring wire gauge size 49 solid carbide tooling with a straight-cylindrical shank in the 0.0500 to 0.1000 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotary cutting tools. Ensure the drill press, CNC spindle, or handheld drill is fully powered down and secured before loading or removing the bit from the chuck. Inspect the carbide tip for chipping or wear before each use, as solid carbide is brittle and susceptible to breakage if subjected to side loading or impact. Follow applicable shop safety codes and machine manufacturer guidelines for speed and feed rates appropriate to the workpiece material.