Iscar 3401211 Corner Radius End Mill 3/4 in 4 Flute Carbide

Product Description

The ISCAR 3401211 is a solid carbide corner radius end mill engineered for high-performance milling in demanding shop environments. It features a 3/4 inch diameter, a 0.09 inch corner radius, and 4 right-hand spiral flutes with a variable index geometry that reduces harmonic vibration during heavy cuts. The AlTiCrSiN PVD coating provides thermal resistance and hardness retention, making this tool well suited for roughing and finishing operations in a single setup. A Weldon flat shank at 3/4 inch diameter with h6 tolerance ensures secure, repeatable clamping in compatible toolholders.

This end mill is designed for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The short-length, extended-reach profile and centercutting capability make it practical for slotting, profiling, and plunge entries in tight workpiece features. It is a single-end tool intended for use in CNC machining centers with a compatible Weldon-flat toolholder. The ECI-4-VF series designation and ISCAR catalog number ECI-4 750-875W09VF3 identify this as part of a precision-ground product family targeting ISO material groups P, M, K, S, and H.

Key Features

• 3/4 inch cutting diameter with 0.09 inch corner radius for edge strength and surface finish quality
• AlTiCrSiN PVD coating rated for steel, stainless steel, superalloys, titanium, and hard materials
• Variable index flute spacing reduces chatter in roughing and finishing passes
• Centercutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Weldon flat shank with h6 tolerance for secure, low-runout toolholder seating
• Submicron carbide grade provides toughness and wear resistance at elevated cutting temperatures

Compatibility

Designed for use with Weldon flat toolholders. Compatible with workpiece materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials (ISO groups P, M, K, S, and H). ISCAR catalog reference ECI-4 750-875W09VF3.

Installation Notes

Installation is performed by a machinist or tooling technician. Confirm the toolholder bore diameter matches the 3/4 inch Weldon flat shank before mounting, and torque the set screw against the flat per the toolholder manufacturer specification. Verify spindle runout at setup to protect both the tool and the workpiece. Do not exceed the recommended axial and radial depth of cut parameters published in the ISCAR ECI-4-VF series application guide.