Iscar 3398544 Square End Mill 3/4 in 5 Flute Solid Carbide

Product Description

The ISCAR 3398544 is a single-end, solid carbide square end mill designed for high-performance milling in demanding metal-cutting applications. It features a 3/4 inch cutting diameter, five flutes, and a 3-1/4 inch length of cut, making it well suited for extended-reach slotting, side milling, and profiling operations. The 38-degree helix angle promotes efficient chip evacuation and smooth cutting action. A TiAlCN coating increases surface hardness and thermal resistance, extending tool life in ferrous and hardened materials. The submicron carbide grade provides fine grain structure for edge retention under high feed rates and elevated cutting temperatures.

This end mill is used in CNC machining centers and manual knee mills across tool rooms, job shops, and production environments. It is appropriate for milling alloy steels, stainless steels, cast iron, and similar materials where a high-helix, multi-flute geometry improves finish quality and material removal rates. The 3/4 inch shank diameter fits standard ER, Weldon, and shrink-fit holders sized for 3/4 inch tooling. The variable index geometry helps reduce chatter during aggressive cuts in rigid setups.

Key Features

• 3/4 inch cutting diameter with matching 3/4 inch shank for direct holder compatibility
• Five flutes with variable index geometry to minimize harmonic chatter
• 38-degree helix angle for efficient chip evacuation and improved surface finish
• TiAlCN coating for elevated thermal resistance and extended tool life in hard materials
• Submicron solid carbide grade for fine grain structure and superior edge retention
• Centercutting design allows plunge entry into workpiece

Compatibility

Designed as an OEM-style solid carbide square end mill compatible with standard 3/4 inch toolholders including ER collet chucks, Weldon-style holders, and shrink-fit systems used in CNC and manual milling applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and all motion has ceased before loading or unloading the tool. Clean the toolholder bore and shank contact surfaces before seating to prevent runout. Follow the toolholder manufacturer torque specifications when securing set screws or collet nuts, and verify runout with a dial indicator before beginning production cuts.