Iscar 3398279 Square End Mill 3/8 in 4 Flute Solid Carbide

Product Description

The ISCAR 3398279 is a solid carbide square end mill designed for precision milling operations in metalworking and machining environments. Built from submicron grain carbide and coated with TiAlCN, it delivers hardness and heat resistance suited to demanding cutting conditions. The 4-flute, right-hand spiral configuration with a 38-degree helix angle promotes efficient chip evacuation and smooth surface finishes. At 0.375 inches in diameter with a 0.75-inch length of cut and 3-inch overall length, this end mill is sized for finish milling, slotting, and profiling in tight-tolerance work. It is centercutting, allowing plunge entry, and features a variable index design for reduced chatter.

This end mill is intended for use in CNC machining centers and manual milling machines across general-purpose and high-performance metal removal applications. The extended reach design, with a 1.25-inch reach length, makes it suitable for reaching into pockets and deep features without sacrificing rigidity. It is a practical choice for machinists working in tool-and-die, aerospace components, mold-making, and precision job-shop environments where consistent edge performance and dimensional accuracy are critical.

Key Features

• Solid carbide construction with submicron grain for edge sharpness and wear resistance
• TiAlCN coating provides high-temperature hardness and oxidation resistance
• 38-degree helix angle with 4 spiral flutes for efficient chip removal
• Centercutting design allows direct plunge milling
• Variable index flute spacing reduces harmonic vibration during cutting
• Extended reach at 1.25 inches for accessing deep pockets and features

Compatibility

Designed as a standard 3/8-inch shank end mill compatible with ER and similar collet systems, end mill holders, and milling chucks used in CNC machining centers and manual knee mills that accept 3/8-inch shank tooling.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Secure the shank fully into a properly sized collet or end mill holder and torque to the tool holder manufacturer specification before running. Verify runout with a dial indicator before beginning a production cut. Do not exceed the recommended depth of cut or feed rate for the workpiece material and machine spindle power rating.