Kennametal 6676431 Corner Radius End Mill 1/2 Inch 4 Flute Altin

Product Description

The KENNAMETAL 6676431 is a solid carbide corner radius end mill designed for demanding metal removal in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It features a 1/2 inch cutting diameter with a 0.06 inch corner radius that reduces stress concentrations at the cutting edge and extends tool life in both roughing and finishing operations. The four-flute, right-hand spiral geometry runs at a 36-degree helix angle, promoting chip evacuation and stable cutting. An AlTiN (aluminum titanium nitride) PVD coating provides thermal resistance and oxidation protection at elevated cutting temperatures. This tool is used by machinists and tool-and-die professionals on CNC machining centers and vertical mills.

The 6676431 belongs to the KENNAMETAL H1TE series, a long-length line engineered for deep-reach milling applications where standard-length end mills cannot access the workpiece. With a 2 inch length of cut and 4 inch overall length, it handles deep pockets, slots, and contoured walls in a single setup. Primary workpiece materials include steel (ISO P), stainless steel (ISO M), cast iron (ISO K), superalloys and titanium (ISO S), and hard materials (ISO H). The centercutting design allows plunge entry without a pre-drilled pilot hole.

Key Features

• Solid carbide submicron-grade substrate for wear resistance in hard and abrasive materials
• AlTiN PVD coating rated for high-temperature cutting environments including dry and near-dry machining
• 0.06 inch corner radius reduces edge chipping and improves part surface finish at pocket floors and walls
• Long-reach geometry with 2 inch length of cut on a 4 inch overall length for deep-pocket access
• Centercutting and right-hand flute direction allow direct plunge entry and climb or conventional milling
• Single-end configuration; straight-cylindrical 1/2 inch shank fits standard end mill toolholders

Compatibility

Designed for use with standard end mill toolholders accepting a 1/2 inch straight-cylindrical shank. Suitable for CNC machining centers, knee mills, and manual vertical mills where deep-reach corner radius milling is required in steel, stainless steel, cast iron, superalloys, titanium, and hard materials.

Installation Notes

Installation is performed by machinists or toolroom personnel following standard toolholder torque and runout procedures for 1/2 inch shank end mills. Ensure the toolholder bore and shank are clean and free of chips before seating. Verify axial runout with a dial indicator before production cuts. Follow your machine tool manufacturer guidelines and applicable shop safety procedures when setting cutting parameters for solid carbide tooling.