Iscar 3401212 Corner Radius End Mill 3/4 in 4 Flute Carbide

Product Description

The ISCAR 3401212 is a solid carbide corner radius end mill from the ECI-4-VF series, designed for high-performance milling in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It carries a 3/4-inch mill diameter, a 0.09-inch corner radius, and four flutes with a variable index geometry that helps reduce chatter and improve surface finish. The AlTiCrSiN PVD coating provides thermal resistance and wear protection during demanding cutting operations. This is a single-end, centercutting tool suited for both roughing and finishing applications.

This end mill is built for machinists and toolroom professionals working on CNC machining centers and milling machines. The Weldon flat shank ensures positive drive in compatible toolholders and reduces slippage under heavy load. The short length type with an extended reach configuration makes it appropriate for applications requiring access into deeper pockets while maintaining rigidity. Primary material applications include steel (P), stainless steel (M), cast iron (K), superalloys and titanium (S), and hard materials (H), covering a broad range of production and job-shop scenarios.

Key Features

• AlTiCrSiN PVD coating for high-temperature wear resistance across difficult workpiece materials
• Variable index flute spacing reduces harmonic vibration during aggressive cuts
• Centercutting design allows plunge entry without a pre-drilled hole
• Weldon flat shank provides positive torque transfer in toolholder
• Submicron carbide grade substrate supports use in hard and abrasive materials
• Right-hand cut and right-hand spiral with normal pitch for predictable chip evacuation

Compatibility

Designed for use with standard Weldon flat toolholders. Compatible with toolholder systems accepting a 3/4-inch shank diameter with h6 tolerance. ISCAR catalog reference ECI-4 750-1.25/2.0W09VF4.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before seating the end mill. Torque the Weldon flat set screw against the flat of the shank per the toolholder manufacturer specification. Verify runout after installation and before engaging the workpiece to avoid premature tool wear or dimensional error.