Walter-prototyp 6579400 Corner Radius End Mill 11.99mm 4 Flute

Product Description

The WALTER-PROTOTYP 6579400 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining environments. With an 11.99 mm (0.4720 inch) cutting diameter, a 2.50 mm (0.098 inch) corner radius, and a TiAlN PVD coating, this tool handles both roughing and finishing operations in a single setup. The four-flute, right-hand spiral geometry with a high helix style promotes efficient chip evacuation and surface finish quality. At 3.0 inches overall length with a 26 mm length of cut, this long-reach design suits deep-cavity and extended-reach milling applications. It is centercutting and runs in standard straight-cylindrical toolholders.

This end mill is suited for CNC machining centers in job shop, die-mold, and production environments. It is engineered for cutting steel, stainless steel, cast iron, superalloys, and titanium, covering ISO material groups P, M, K, and S. The extended reach configuration, 38 mm reach length, and 11.40 mm neck diameter make it well-suited for profiling, contouring, and pocketing where tool clearance is tight. It fits standard toolholders compatible with a 12 mm straight-cylindrical shank.

Key Features

• Solid carbide construction with TiAlN PVD coating for thermal resistance and tool life in ferrous and exotic alloys
• 2.50 mm corner radius reduces stress concentration at the cutting edge and improves workpiece surface finish
• Four right-hand spiral flutes with high helix angle support efficient chip removal during roughing and finishing
• Extended reach design with 38 mm reach length and 11.40 mm neck diameter for deep-cavity access
• Centercutting capability allows direct plunge entry without a pre-drilled hole
• Normal pitch, no chipbreaker, no coolant-through - optimized for external coolant or dry machining setups

Compatibility

Designed for use with standard toolholders accepting a 12 mm straight-cylindrical shank (shank tolerance h5). Part of the Walter MC326 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the toolholder is clean and undamaged before seating the shank to tolerance h5 spec. Confirm spindle speed and feed rate parameters are appropriate for the workpiece material group before engaging the cut. Do not exceed the rated length of cut or reach length, as overhang beyond the neck diameter reduces rigidity and increases deflection risk.