Iscar 3398044 Corner Radius End Mill 3/4 in 4 Flute Carbide

Product Description

The ISCAR 3398044 is a solid carbide corner radius end mill from the ECI-4-VF series, engineered for demanding material removal in both roughing and finishing operations. It features a 3/4-inch cutting diameter, a 0.015-inch corner radius, and four flutes with a variable index geometry that reduces harmonic vibration during aggressive cuts. The tool carries a PVD-applied AlTiCrSiN coating for extended wear resistance at elevated temperatures. At 3 inches overall length with a 7/8-inch length of cut, this is a short-series tool optimized for rigidity. A straight-cylindrical shank with h6 tolerance ensures consistent runout in precision toolholders.

This end mill is rated for cutting steel, stainless steel, cast iron, superalloys, titanium, and hard materials, covering ISO material groups P, M, K, S, and H. The right-hand spiral flutes and right-hand cutting direction make it compatible with standard CNC machining centers and manual mills. The centercutting geometry allows plunge entry, and the extended-reach design provides clearance in deeper pockets and profiling applications. It is a single-end tool intended for use with a compatible toolholder in production or job-shop environments.

Key Features

• AlTiCrSiN PVD coating for high-temperature and abrasion resistance across steel and superalloy workpieces
• Variable index flute spacing reduces chatter and harmonic vibration during roughing passes
• Centercutting design permits direct plunge entry without a pre-drilled pilot hole
• Submicron carbide grade substrate supports tight tolerances in hard and abrasive materials
• Straight-cylindrical shank with h6 tolerance for low runout in precision collet or hydraulic toolholders
• Short-series length maximizes rigidity in tight-clearance setups

Compatibility

Designed for use with standard toolholders accepting a 3/4-inch straight-cylindrical shank. The ISCAR catalog number for this tool is ECI-4 750-875C015VF3. Suitable for CNC machining centers operating on steel, stainless steel, cast iron, superalloys, titanium, and hard materials per ISO groups P, M, K, S, and H.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the toolholder. Seat the shank to the full recommended gauge-line depth in the holder and verify runout with a dial indicator before commencing cuts. Refer to the machine tool builder and ISCAR cutting data recommendations for speed, feed, and depth-of-cut parameters appropriate to the workpiece material.