Iscar 3398062 Corner Radius End Mill 3/8 in 4 Flute Carbide

Product Description

The ISCAR 3398062 is a solid carbide corner radius end mill from the ECI-4-VF series, designed for high-performance material removal in demanding machining applications. It carries a 3/8-inch mill diameter and a 0.0300-inch corner radius, with four flutes ground in a right-hand spiral and right-hand cutting direction. The tool features a variable index geometry that supports both roughing and finishing passes in a single setup. An AlTiCrSiN PVD coating delivers thermal and wear resistance at elevated cutting speeds. The 4-inch overall length and extended-reach configuration make it suitable for deep-cavity and hard-to-reach workzone applications. Installation requires a straight-cylindrical toolholder with h6 shank tolerance compliance.

This end mill is intended for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials, covering ISO material groups P, M, K, S, and H. Its long-reach, centercutting design allows plunge entry and lateral milling in confined geometries. The ECI-4-VF series is commonly applied in mold and die work, aerospace component machining, and general precision metalworking where tool life and surface finish consistency are both critical. It mounts in standard straight-cylindrical toolholders and is supplied as a single-end tool with no chipbreaker geometry.

Key Features

• Solid carbide submicron-grade substrate for rigidity and wear resistance in hard materials
• AlTiCrSiN PVD coating rated for steel, stainless, cast iron, superalloys, titanium, and hard workpiece materials
• Variable index flute spacing reduces harmonic chatter during aggressive cuts
• 0.0300-inch corner radius protects the cutting edge and improves surface finish at part corners
• Extended-reach design with 5/8-inch reach length and 4-inch OAL for deep-pocket access
• Centercutting capability allows direct plunge entry without a pre-drilled pilot hole
• Right-hand flute direction and right-hand cut; compatible with standard CNC mill spindle rotation

Compatibility

Designed for use with straight-cylindrical toolholders meeting h6 shank tolerance. The manufacturers catalog reference for this tool is ECI-5 .375-1.5C.06VF4. Confirm toolholder bore diameter matches the 3/16-inch shank diameter before mounting.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing tooling. Verify toolholder runout and clamping torque per the toolholder manufacturers specification before cutting. Do not exceed the cutting parameters recommended for the workpiece material grade and coating type; consult the ISCAR ECI-4-VF series application data for feed, speed, and depth-of-cut guidance.