Seco 10268381 Corner Radius End Mill 7/16 Inch 4 Flute

Product Description

The SECO 10268381 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. With a 7/16-inch (0.4375-inch) mill diameter and a 0.0600-inch corner radius, this single-end tool blends durability with precision. The four-flute, right-hand helical design is coated with SIRON-A via a PVD process, delivering improved wear resistance and thermal stability. Rated for roughing and finishing operations, the 10268381 suits shops running steel, stainless steel, cast iron, superalloys, and titanium. It weighs 0.2 pounds and is machined to close tolerances consistent with ANSI B94.19 and NAS 986 standards.

This end mill is intended for use in CNC machining centers and manual mills where a corner radius profile is needed to reduce stress concentrations at part corners. It is center-cutting, allowing plunge entry into the workpiece. The cylindrical shank seats directly into a standard toolholder. Typical users include machinists and toolroom technicians working in job shops, aerospace, and general manufacturing environments that regularly machine ferrous metals and difficult-to-cut alloys. The standard-length flute configuration and normal pitch make this a versatile choice for a wide range of milling programs.

Key Features

• 0.0600-inch corner radius reduces stress at part corners and extends tool life compared to sharp-corner end mills
• SIRON-A PVD coating provides enhanced wear resistance, particularly in steel and stainless steel
• Solid micrograin carbide substrate supports rigidity and edge integrity in hard and abrasive materials
• Center-cutting design enables direct plunge entry without a pre-drilled pilot hole
• Right-hand cut and right-hand helical flutes with normal pitch for stable chip evacuation
• Rated for both roughing and finishing passes, reducing the need to change tools mid-operation

Compatibility

Designed for use with standard cylindrical-bore toolholders. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium (material codes P, M, K, S). Part of the SECO C5141 series.

Installation Notes

Installation is performed by qualified machinists following shop safety and machine lockout procedures. Secure the cylindrical shank in a clean, properly sized toolholder and verify runout against the stated TIR maximum of 0.0005 inches before beginning a cut. Do not exceed the toolholder torque and clamping specifications provided by the toolholder manufacturer. Inspect the cutting edges for chipping or wear before each use and replace the tool if edge condition is compromised.