The Widin Carbide Corner Radius End Mill is a 12 mm diameter carbide cutting tool designed for stainless steel and exotic alloys. Its corner radius of 3.0 mm (R3.0) and 4-flute, variable-helix geometry provide efficient chip control and a smooth surface finish when forming rounded corners.

This end mill is built for a wide range of users—from engineers and machinists to fabricators and hobbyists—who need precise radii and reliable performance on tough materials. The high-hardness cutting edge delivers strong wear resistance, helping you achieve consistent results over longer tool life.

• Unequal index flutes for excellent chip emission and surface finish: The varied flute spacing promotes quick chip evacuation, reducing heat and rubbing to produce a cleaner, smoother finish on stainless and exotic metals.
• 4-flute, variable-helix carbide design for durability and versatility: The combination of four flutes and a variable helix reduces cutting forces, enhances rigidity, and supports stable cuts across a range of applications with longer tool life.
• 12 mm diameter with R3.0 corner radius for precise profiles: This geometry delivers defined, repeatable corner radii on tough materials, enabling accurate part geometry and easier deburring.

Together, these features help you complete more work in less time: smoother finishes, repeatable radii, and longer tool life translate to fewer reworks, higher first-pass quality, and improved throughput on challenging materials.