Iscar 3401157 Corner Radius End Mill 7/16in 4 Flute Carbide

Product Description

The ISCAR 3401157 is a solid carbide corner radius end mill designed for demanding material removal in both roughing and finishing operations. Built on the ECI-4-VF series platform, it features a 7/16 inch (0.437 inch) cutting diameter, a 3 inch length of cut, and a 0.06 inch corner radius that reduces stress concentration at the cutting edge and extends tool life. The AlTiCrSiN PVD coating provides thermal resistance and wear protection when cutting abrasive and high-hardness workpiece materials. Four flutes with a variable index geometry and right-hand spiral flute configuration support efficient chip evacuation and vibration damping across a range of applications. Licensed machinists and CNC machine operators install and qualify this tool.

This end mill is rated for use on steel, stainless steel, cast iron, superalloys, titanium, and hard materials, covering ISO material groups P, M, K, S, and H. Its extra-long reach length of 3 inches and 6 inch overall length make it suitable for deep-pocket milling, cavity work, and extended-reach profiling operations where a standard-length tool cannot access the feature. The Weldon flat shank with h6 tolerance mounts directly into compatible side-lock toolholders. The centercutting geometry allows plunge entry without a pre-drilled pilot hole, and the submicron carbide substrate grade supports stable operation in hard material applications.

Key Features

• AlTiCrSiN PVD coating for high-temperature wear resistance in steel, stainless steel, and superalloy cutting
• Variable index, 4-flute design reduces harmonic vibration and chatter during high-load passes
• 0.06 inch corner radius extends edge durability and reduces corner chipping versus sharp-corner geometry
• Extra-long reach (3 inch reach length, 6 inch OAL) accesses deep pockets and tall workpiece features
• Centercutting construction permits direct plunge milling without a pre-drilled entry point
• Weldon flat shank with h6 shank tolerance for secure, repeatable seating in side-lock toolholders
• Submicron carbide substrate supports rigidity and edge retention in hard material applications

Compatibility

Designed for use with standard side-lock Weldon flat toolholders accepting a 7/16 inch shank diameter. The manufacturer catalogs this tool under series reference ECI-4 437-3.0W06VF6. Compatible workpiece materials per manufacturer data include steel, stainless steel, cast iron, superalloys, titanium, and hard materials (ISO groups P, M, K, S, H).

Installation Notes

Installation and tool qualification should be performed by a trained machinist or CNC toolroom technician following the machine tool builder guidelines and applicable shop safety procedures. Ensure the machine spindle is fully stopped and the controller is in a safe state before changing tools. Verify the Weldon flat is fully aligned with the toolholder set screw before torquing, and confirm runout with a dial indicator after installation. Do not exceed the toolholder manufacturer recommended clamping torque for the shank diameter.