Iscar 3401173 Corner Radius End Mill 5/8 in 4 Flute Carbide

Product Description

The ISCAR 3401173 is a solid carbide corner radius end mill designed for high-performance metal removal in demanding machining applications. Part of the ECI-4-VF series, it features a 5/8 inch diameter, 0.06 inch corner radius, and four flutes with a variable index geometry that reduces harmonic vibration during heavy cuts. The 1-3/4 inch length of cut and 4 inch overall length make it well-suited for medium-depth slotting, profiling, and contouring. An AlTiCrSiN PVD coating provides thermal and oxidation resistance for extended tool life at elevated cutting speeds. The Weldon flat shank provides secure clamping in compatible toolholders.

This end mill is engineered for roughing and finishing operations on steel, stainless steel, cast iron, superalloys, titanium, and hard materials. Its extended reach configuration and right-hand spiral flutes support a wide range of milling strategies on CNC machining centers. The centercutting geometry allows plunge entry, adding flexibility in part programming. It is used by machinists and tool-and-die professionals in both job shop and production environments where tight tolerances and surface finish matter.

Key Features

• Variable index flute spacing reduces chatter and improves surface finish on difficult materials
• AlTiCrSiN PVD coating delivers thermal resistance for dry and semi-dry cutting of hard and abrasive workpieces
• Centercutting design enables direct plunge entry without a pilot hole
• Weldon flat shank ensures positive drive and prevents tool pullout in high-torque applications
• Submicron carbide grade provides edge strength and wear resistance for extended run lengths
• Right-hand cut and right-hand spiral for standard CNC spindle compatibility

Compatibility

Designed for use with standard Weldon flat toolholders. Compatible with the ECI-4-VF series toolholder interface. Suitable for machining steel, stainless steel, cast iron, superalloys, titanium, and hard materials per ISCAR material codes P, M, K, S, and H.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and all energy is locked out before changing tooling. Seat the Weldon flat fully in the holder and tighten the set screw to the toolholder manufacturer's specification. Verify runout with a dial indicator before commencing a production cut, particularly when machining tight-tolerance features or hard materials.