Iscar 3399023 Corner Radius End Mill 3/16in 3 Flute Carbide

Product Description

The ISCAR 3399023 is a solid carbide corner radius end mill engineered for both roughing and finishing operations on non-ferrous metals. It features a 3/16-inch (0.1870 inch) cutting diameter and a 0.015-inch corner radius that helps reduce chipping at the cutting edge and extend tool life in high-cycle applications. The tool carries a DLC (Diamond-Like Carbon) PVD coating applied for improved hardness and low friction when cutting aluminum and other non-ferrous workpiece materials. With three right-hand spiral flutes and a coarse pitch, the 3399023 evacuates chips efficiently at aggressive feed rates. It is installed by machinists and tool-and-die professionals in CNC milling centers and manual knee mills.

This end mill is designed for use on non-ferrous metals including aluminum, copper, and brass alloys in short-reach, high-precision milling scenarios. It belongs to the ISCAR ECAI-B3-EC series and is cataloged under ISCAR manufacturer catalog number ECAI-B3 .187-.3CR015-2EC. The extended-reach geometry and centercutting capability make it suitable for slotting, profiling, and plunge-entry operations without a pre-drilled pilot hole. It mounts in a standard straight-bore toolholder accepting a 3/16-inch shank.

Key Features

• DLC (Diamond-Like Carbon) PVD coating for low-friction cutting in non-ferrous applications
• 0.015-inch corner radius reduces edge chipping and improves corner durability
• Centercutting design allows direct plunge entry without a pilot hole
• Three right-hand spiral flutes with coarse pitch for efficient chip evacuation
• Submicron carbide grade for fine grain structure and edge toughness
• Single-end, straight-cylindrical shank fits standard toolholders

Compatibility

Designed for use with standard straight-bore toolholders accepting a 3/16-inch shank diameter. Suited for CNC machining centers and manual mills performing roughing and finishing passes on non-ferrous metal workpieces.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power secured. Ensure the toolholder bore and shank are clean and free of chips or coolant residue before seating the end mill. Verify runout after clamping to protect both the tool and the workpiece. This tool is not rated for coolant-through delivery; external coolant or air blast should be directed at the cutting zone.