Kennametal 6676388 Corner Radius End Mill 3/8 in 4 Flute

Product Description

The KENNAMETAL 6676388 is a solid carbide corner radius end mill designed for demanding metal-cutting applications across a wide range of ferrous and hard materials. Built to H1TE series specifications, it features a 3/8-inch cutting diameter with a 0.06-inch corner radius that blends strength and surface finish quality at the cutting edge. The AlTiN PVD coating extends tool life in high-heat environments by improving oxidation resistance. With 4 flutes and a right-hand spiral flute configuration, this end mill is suited for both roughing and finishing passes in a single setup. It is installed and used by machinists and toolroom professionals on CNC milling machines and machining centers.

This end mill is engineered for cutting steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The centercutting design allows plunge entry, expanding its versatility in slotting, profiling, and ramp-milling operations. It is compatible with HC 20M through HC 32M hydraulic sleeves with inch bores, making it a direct fit for Kennametal modular tooling systems used in production and job-shop environments where tight tolerances and consistent tool life are required.

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance in hard and abrasive materials
• AlTiN PVD coating provides high oxidation resistance and extends tool life at elevated cutting temperatures
• 0.06-inch corner radius reduces edge chipping and improves surface finish on workpiece corners
• Centercutting geometry allows direct plunge entry without a pre-drilled hole
• Right-hand cut and right-hand flute spiral for standard climb and conventional milling setups
• Normal pitch, 4-flute layout balances chip evacuation and feed rate capability across roughing and finishing

Compatibility

Compatible with HC 20M through HC 32M hydraulic sleeves with inch bores. Designed for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials in CNC milling applications. Straight-cylindrical shank fits standard 3/8-inch collet chucks and hydraulic toolholders.

Installation Notes

Installation should be performed by a qualified machinist following machine tool manufacturer guidelines for toolholder torque and runout specifications. Ensure the machine spindle and toolholder are fully de-energized and locked out before changing or setting the tool. Verify shank seating depth and runout with a dial indicator before committing to a production cut. Do not exceed the manufacturer-recommended cutting parameters for the workpiece material being machined.