Iscar 3398984 Square End Mill 1/4 in 3 Flute Carbide Dlc

Product Description

The ISCAR 3398984 is a single-end square end mill designed for precision milling in a wide range of ferrous and non-ferrous materials. Built from submicron-grade solid carbide, it features a 1/4 inch cutting diameter, a 3/4 inch length of cut, and a 45-degree helix angle that promotes efficient chip evacuation and reduced cutting forces. A diamond-like carbon (DLC) coating provides a hard, low-friction surface that extends tool life in demanding applications. The variable index flute geometry helps suppress vibration and chatter during aggressive cuts. Licensed machinists and CNC operators install and run this tool in vertical machining centers and CNC milling equipment.

This end mill is suited for high-precision profiling, slotting, and contouring operations in shop and production environments. The right-hand cutting and right-hand flute direction are standard for conventional CNC setups. The 1/4 inch shank diameter fits standard ER collet chucks and end mill holders common in both job shop and production machining. Its 2.5 inch overall length keeps the tool rigid in typical workholding setups, making it appropriate for finishing and semi-finishing passes where dimensional accuracy is critical.

Key Features

• Submicron-grade solid carbide construction for hardness and wear resistance
• DLC coating reduces friction and extends tool life
• 45-degree helix angle promotes efficient chip evacuation
• Variable index flute spacing reduces harmonic vibration and chatter
• Center-cutting capable for direct plunge entry
• Right-hand cut and right-hand flute direction for standard CNC spindle compatibility

Compatibility

Designed as a direct-fit replacement end mill for standard 1/4 inch shank ER collet chucks and end mill holders used in CNC vertical machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the spindle before loading or removing the tool from the holder. Verify collet and holder cleanliness before seating the shank to ensure runout is within acceptable tolerance. Follow the machine tool manufacturer torque specifications for collet nut tightening.