Iscar 3398269 Square End Mill 5/16 in 4 Flute Carbide

Product Description

The ISCAR 3398269 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. It features a 5/16 inch (0.3125 inch) mill diameter, a 7/8 inch length of cut, and a 4-flute configuration with a 38-degree right-hand helix. The end mill is finished with a TiAlCN coating, which improves wear resistance and extends tool life in ferrous and hardened materials. It is a single-end, center-cutting tool with a right-hand cutting direction and a variable index design. This tool is installed and operated by machinists and CNC operators in shop and production environments.

This end mill is suited for slotting, profiling, and peripheral milling in ferrous metals and alloys where a fine surface finish and accurate dimensional control are required. The submicron carbide grade and spiral flute geometry support stable chip evacuation and reduced vibration during cutting. The 5/16 inch shank diameter matches the mill diameter, making it compatible with standard collet and end mill holders at that bore size. The 2-1/2 inch overall length provides adequate reach for most standard workholding setups without requiring extended reach tooling.

Key Features

• 5/16 inch mill diameter with matching 5/16 inch shank diameter for direct holder fitment
• 4-flute spiral configuration with 38-degree right-hand helix for efficient chip flow
• TiAlCN coating for enhanced wear resistance in demanding cutting conditions
• Center-cutting design allows plunge entry without pre-drilling
• Variable index flute spacing reduces harmonic vibration during milling
• Submicron carbide grade supports consistent performance in hard and abrasive materials

Compatibility

Designed for use with standard 5/16 inch bore collet chucks and end mill holders in CNC machining centers and manual milling machines. No specific model compatibility was stated in the product data.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for tool runout and holder torque. Ensure the spindle is fully stopped and the machine is powered down or in a safe state before changing tooling. Use a calibrated collet or hydraulic holder to minimize runout and maximize tool life. Follow applicable shop safety standards when handling carbide cutting tools, as edges are sharp and carbide is brittle under lateral impact.