Iscar 3398443 Corner Radius End Mill 3/4 in 5 Flute Carbide

Product Description

The ISCAR 3398443 is a solid carbide corner radius end mill designed for demanding material removal in production machining environments. The tool features a 0.75 inch diameter, a 3.25 inch length of cut, and a 0.06 inch corner radius that reduces stress concentration at the cutting edge and extends tool life in interrupted or continuous cuts. A five-flute, right-hand spiral configuration with variable index geometry supports both roughing and finishing passes. The AlTiCrSiN PVD coating provides thermal and oxidation resistance, making the tool well-suited for aggressive feed rates in tough workpiece materials. The extra-long profile and extended reach of 3.25 inches give machinists access to deep pockets and tall workpiece features without sacrificing rigidity.

This end mill is intended for use in CNC machining centers and milling machines across job shop and production environments. It is rated for steel, stainless steel, cast iron, superalloys, titanium, and hard materials. The straight-cylindrical shank with h6 tolerance mounts directly into standard collet chucks, shrink-fit holders, or hydraulic toolholders. The single-end, extra-long design is a common selection for deep-pocket profiling, contouring, and wall finishing where standard-length tools cannot reach. Machinists working with aerospace, die-and-mold, or heavy-equipment components will find this geometry appropriate for high-material-removal-rate strategies in difficult alloys.

Key Features

• 0.06 inch corner radius reduces edge chipping and improves surface finish at pocket floors and wall transitions
• Five-flute variable index geometry minimizes harmonic chatter during both roughing and finishing operations
• AlTiCrSiN PVD coating resists heat and oxidation for extended tool life in ferrous and hard materials
• Extra-long 6 inch overall length with 3.25 inch reach enables deep-pocket and tall-wall milling
• Right-hand cut, right-hand spiral with normal pitch suits standard climb-milling strategies
• Submicron carbide grade provides toughness and wear resistance across the rated workpiece material range

Compatibility

Designed for use with standard collet, shrink-fit, or hydraulic toolholders accepting a 0.75 inch straight-cylindrical shank. Rated for primary workpiece materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials (ISO material codes P, M, K, S, H). Part of the ISCAR ECI-5-VF series; manufacturer catalog reference ECI-5 .75-3.25C.06VF6.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Seat the shank fully in the toolholder to the recommended gauge-line depth and torque the retention mechanism per the toolholder manufacturer specifications before mounting in the spindle. Verify runout with a dial indicator before initiating a cut, as excessive runout in a five-flute variable-index tool will unevenly load individual flutes and accelerate wear. Confirm spindle speed, feed rate, and axial depth of cut against the ISCAR ECI-5-VF series cutting data before first use.