Seco 03007644 Corner Radius End Mill 3/8 in 6 Flute S638R

Product Description

The SECO 03007644 is a solid carbide corner radius end mill designed for precision milling in ferrous and high-temperature alloy applications. It carries a 3/8 inch diameter with a 0.0300 inch corner radius and features six flutes with a 38-degree helix angle for aggressive material removal combined with a quality surface finish. The AlTiN (aluminum titanium nitride) PVD coating provides thermal resistance and wear protection, extending tool life in demanding cuts. This is a single-end, centercutting tool built on a straight-cylindrical shank and belongs to SECO's S638R series. It is suited for use in CNC machining centers and manual mills with compatible toolholders.

This end mill is rated for use on steel, stainless steel, cast iron, superalloys, and titanium — material codes P, M, K, and S. The stub length-of-cut and close pitch flute configuration make it well suited for both roughing and finishing passes in short-overhang setups. Machinists and toolroom professionals running tight-tolerance work will find the corner radius geometry useful for blending floor-to-wall transitions and reducing stress concentrations at part features.

Key Features

• Six-flute design with close pitch for improved chip load distribution and surface finish
• AlTiN PVD coating for high heat resistance in steel, stainless steel, and titanium cuts
• 0.0300 inch corner radius with a tolerance of +0.00100 to -0.00100 inches for controlled edge geometry
• Centercutting geometry allows plunge entry without a pre-drilled hole
• Right-hand flute direction and right-hand cutting for standard CNC spindle setups
• Micrograin carbide substrate for edge integrity in hard and abrasive materials

Compatibility

Designed for use with standard toolholders accepting a 3/8 inch straight-cylindrical shank. Suitable for CNC machining centers and conventional mills running workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the toolholder collet or end mill holder is clean and free of debris before seating the shank. Confirm runout against the TIR maximum specification before beginning a cut. Do not exceed the rated length of cut of 1 inch to avoid deflection or tool breakage.