Hertel 74459959 Solid Carbide Jobber Drill Bit 3.5 Mm

Product Description

The HERTEL 74459959 is a solid carbide jobber-length drill bit designed for precision drilling in demanding shop and field applications. Ground to a 3.5 mm (0.1378 inch) diameter with a 118-degree standard point angle, this bit delivers consistent entry geometry in ferrous and non-ferrous materials. The bright finish is applied without coating buildup, maintaining tight dimensional tolerances at the cutting edge. The two-flute spiral design with a tapered, web-thinned construction reduces thrust and improves chip evacuation. Machinists and maintenance technicians working with CNC equipment, drill presses, or portable units rely on solid carbide tooling like this for repeatable hole quality in harder workpiece materials.

This jobber drill bit suits general-purpose hole-making operations in machine shops, fabrication environments, and industrial maintenance settings. The straight cylindrical shank fits standard drill chucks across a wide range of machines. With a flute length of 1.25 inches and an overall length of 2.5 inches, it is sized for conventional jobber-depth applications where reach and rigidity are balanced. Material grade C2 carbide positions it for use in cast iron, aluminum alloys, plastics, and similar materials where high-speed steel tooling may not provide adequate tool life.

Key Features

• Solid carbide construction for extended tool life versus HSS in harder materials
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright finish maintains edge sharpness without coating interference
• Two-flute regular spiral geometry promotes efficient chip evacuation
• Diameter tolerance of -0.0005 to 0.0000 inches ensures precise hole sizing
• Straight cylindrical shank for broad chuck compatibility

Compatibility

Designed as a general-purpose jobber-length carbide drill bit suited for standard drill chucks accepting a 0.1378-inch straight cylindrical shank. Fits drill bit size range applications from 0.1000 to 0.1500 inches (3.00 to 4.00 mm) where C2-grade carbide tooling is specified.

Installation Notes

Installation and use should be performed by machinists or qualified technicians familiar with cutting tool safety practices. Secure the shank fully in a properly sized drill chuck and verify runout before beginning a cut. Ensure the workpiece is firmly fixtured to prevent movement during drilling. Solid carbide is brittle compared to HSS - avoid lateral loading, interrupted cuts without proper setup, or dropping the tool on hard surfaces, as these can cause chipping or fracture.