Hertel E7020008 Ball End Mill 0.125 in 4 Flute Cobalt

Product Description

The HERTEL E7020008 is a single-end ball end mill designed for precision milling operations in metal fabrication and machining applications. Built from M42 cobalt high-speed steel, it delivers increased heat and wear resistance compared to standard HSS tooling. The cutting geometry features 4 right-hand flutes with a right-hand cutting direction, and the tool carries a TiCN (titanium carbonitride) coating that further extends tool life in ferrous and non-ferrous materials. With a 0.125 inch mill diameter and 0.375 inch length of cut, this end mill suits fine detail work, contour milling, and slotting in close-tolerance setups.

This end mill is suited for use in CNC machining centers and manual milling machines where a small-diameter ball nose profile is required. It is appropriate for profiling, 3D contouring, and finish passes in steel, stainless, cast iron, and similar materials. The cobalt M42 substrate and TiCN coating make it a capable choice for production environments where tool longevity and dimensional consistency matter. Machinists and tool-and-die professionals are the primary users of this tooling.

Key Features

• M42 cobalt high-speed steel substrate for elevated heat resistance and hardness
• TiCN coating reduces friction and extends tool life in ferrous materials
• 4-flute, right-hand cut geometry for efficient chip evacuation and finish quality
• 0.125 inch ball nose diameter for fine detail and contour milling
• Single-end configuration with 0.375 inch shank diameter for secure tool holding
• 2.3125 inch overall length provides reach without excessive overhang

Compatibility

Designed for use in standard end mill holders and collet chucks accepting a 0.375 inch shank diameter, compatible with CNC machining centers and manual mills configured for right-hand tooling.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and locked out before changing tooling. Secure the shank to the full recommended engagement depth in the holder to minimize runout and prevent pullout during cutting. Follow machine tool manufacturer guidelines for speeds and feeds appropriate to the workpiece material and coating type.