Seco 03084190 Corner Radius End Mill 5/8 in 4 Flute Altin

Product Description

The SECO 03084190 is a solid carbide corner radius end mill designed for demanding material removal in stainless steel, superalloys, and titanium. It features a 5/8 inch diameter, a 0.0300 inch corner radius, and four flutes with a variable helix geometry that reduces chatter and improves surface finish at high feed rates. The AlTiN coating, applied via PVD process, provides thermal resistance and extended tool life when cutting hard and abrasive workpiece materials. At 3.5 inches overall length with a 1.25 inch length of cut, it is sized for short-reach, high-rigidity setups typical in precision milling operations. Machinists and CNC operators in aerospace, medical, and industrial manufacturing environments rely on this geometry for both roughing and finishing passes in a single tool.

This end mill is suited for milling stainless steel (ISO M), superalloys and titanium (ISO S), and hard materials (ISO H) in CNC machining centers and manual mills. Its centercutting capability allows plunge entry into the workpiece. The Weldon flat shank provides positive drive in standard Weldon-style toolholders, reducing pullout risk under high axial loads. It is part of the STR440.2 series, which targets short-reach, high-performance applications where tool deflection must be minimized. Normal pitch and right-hand flute direction suit conventional and climb milling strategies on tight-tolerance components.

Key Features

• Solid carbide micrograin substrate for hardness and wear resistance in difficult-to-machine alloys
• AlTiN PVD coating provides high-temperature oxidation resistance and extended tool life
• Variable helix design reduces harmonic vibration and chatter during aggressive cuts
• 0.0300 inch corner radius protects cutting edges and improves corner strength in pocketing operations
• Centercutting, single-end geometry allows direct plunge milling without a pre-drilled pilot hole
• Weldon flat shank ensures positive retention in toolholders under heavy radial and axial loads
• Rated for roughing and finishing, reducing tool changes in multi-step milling programs

Compatibility

Designed for use with Weldon-style toolholders. Intended for CNC machining centers and manual mills where 5/8 inch shank tooling is specified. Primary workpiece materials are stainless steel, superalloys, titanium, and hard materials per ISO material codes M, S, and H.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a locked-out, de-energized state per applicable machine safety procedures. Seat the Weldon flat shank fully into the toolholder bore and tighten the set screw against the flat to the toolholder manufacturer's specification. Verify runout does not exceed the 0.0005 inch maximum TIR before engaging the workpiece. Inspect the cutting edges for chipping or coating wear at regular intervals, particularly when machining superalloys and titanium, as these materials accelerate edge wear.