Iscar 3398255 Square End Mill 1/4 in 4 Flute Carbide

Product Description

The ISCAR 3398255 is a solid carbide square end mill designed for precision metal removal in milling applications. Built from submicron-grade carbide and finished with a TiAlCN coating, this tool delivers heat and wear resistance well-suited to high-speed cutting of ferrous and non-ferrous materials. It features a 1/4 inch diameter, a 1/2 inch length of cut, and a 3-inch overall length, making it a compact but capable option for slotting, profiling, and peripheral milling. The 38-degree helix angle promotes efficient chip evacuation and smooth cutting action. Installation and use is handled by machinists and CNC operators in production and job-shop environments.

This end mill is configured as a single-end, right-hand cut tool with right-hand flute direction and a variable index design. The 1/4 inch shank diameter fits standard ER collets and end mill holders common in CNC machining centers and manual knee mills. With a reach length of 1-1/4 inches and extended reach geometry, it is suited for applications requiring access to deeper features without sacrificing rigidity. Center-cutting capability allows plunge entry directly into the workpiece.

Key Features

• Submicron solid carbide construction for superior hardness and edge retention
• TiAlCN coating provides thermal protection and extended tool life in dry or minimal-lubrication cuts
• 38-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Variable index flute spacing minimizes chatter and vibration during aggressive cuts
• Center-cutting geometry allows direct plunge milling without a pre-drilled entry hole
• Extended reach design accommodates deeper feature access with a 1-1/4 inch reach length

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill compatible with standard 1/4 inch end mill holders and ER collet systems used in CNC machining centers and manual milling machines.

Installation Notes

This tool is installed and operated by machinists and CNC programmers. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the collet or tool holder and torque the retention nut to the holder manufacturer's specification. Verify runout with a dial indicator before beginning production cuts to protect both the tool and the workpiece.