Iscar 3398489 Corner Radius End Mill 5/8 in 5 Flute Carbide

Product Description

The ISCAR 3398489 is a solid carbide corner radius end mill engineered for demanding metal removal in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries a 5/8 inch cutting diameter, a 1/8 inch (0.1250 inch) corner radius, and five flutes arranged in a variable index, right-hand spiral configuration. The AlTiCrSiN PVD coating provides thermal and oxidation resistance suited to high-speed finishing and roughing passes. With an overall length of 6 inches and an extra-long reach of 3 inches, this tool handles deep-cavity and extended-reach applications that shorter end mills cannot reach. Installation is by straight-cylindrical shank with h6 tolerance for precise toolholder fit.

This end mill is part of the ISCAR ECI-5-VF series, designed for combined roughing and finishing operations on the most common and challenging workpiece materials encountered in precision machining environments. Typical applications include die and mold work, aerospace component profiling, and general CNC milling on steel and superalloy parts. The 5/8 inch shank diameter matches the cutting diameter, keeping the tool running concentric and minimizing deflection across the full 3 inch reach. It accepts standard cylindrical toolholders and is suited for CNC machining centers running right-hand spindle rotation.

Key Features

• AlTiCrSiN PVD coating for heat resistance and extended tool life in steel, stainless, and hard materials
• Variable index flute spacing reduces harmonic vibration during aggressive cuts
• Extra-long 3 inch reach length enables deep-cavity and extended-reach milling
• Submicron carbide grade provides high hardness and edge integrity at elevated cutting temperatures
• 1/8 inch corner radius reduces stress concentration at the cutting corner and improves surface finish
• Right-hand cut, right-hand spiral, single-end geometry for conventional CNC milling center use

Compatibility

Designed for use with standard cylindrical toolholders accepting a 5/8 inch straight shank with h6 diameter tolerance. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, titanium, and hard materials as specified by the manufacturer for the ECI-5-VF series.

Installation Notes

This tool is installed and serviced by qualified machinists or CNC tooling technicians. Ensure the machine spindle is fully stopped and all motion is locked out before changing tooling. Seat the shank fully into the toolholder and torque the retention mechanism to the toolholder manufacturer specifications. Do not exceed the tool reach beyond the rated 3 inch length of cut, as unsupported overhang beyond design parameters accelerates deflection and tool wear.