Harvey Tool 21125-C3 Corner Rounding End Mill 1/8 in Radius

Product Description

The HARVEY TOOL 21125-C3 is a solid carbide corner rounding end mill designed to produce precise radius profiles on workpiece edges in milling operations. With a 1/8 inch radius and 0.625 inch mill diameter, this double-end tool delivers a tip diameter of 0.248 inches. The 4-flute, right-hand cut geometry paired with an AlTiN coating makes it well suited for high-speed finishing passes in hard and abrasive materials. Machinists and tool-and-die professionals rely on this style of end mill for consistent, repeatable edge forms on steel, stainless, and hardened alloys.

This end mill is used in CNC machining centers and manual mills for edge rounding, profile blending, and cosmetic chamfer work on metal components. The double-end configuration provides two usable cutting ends, extending tool life between replacements. Its 0.625 inch shank diameter seats directly into standard ER or end mill holders. Typical applications include aerospace, mold and die, and general precision machining where a controlled corner radius is required on finished parts.

Key Features

• 1/8 inch corner radius for consistent, repeatable edge profiling
• Double-end design provides two cutting ends per tool
• AlTiN coating improves heat resistance and tool life in hard materials
• Micrograin solid carbide substrate for rigidity and wear resistance
• 4-flute, right-hand cut and right-hand flute direction for standard CNC use
• 0.248 inch tip diameter allows access to tighter workpiece geometry

Compatibility

Designed as an OEM-style replacement or direct-use corner rounding end mill compatible with standard 5/8 inch end mill holders and collet chucks used in CNC and manual milling setups.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Secure the shank fully into a clean, properly sized tool holder and torque to the holder manufacturer's specification before machining. Inspect the cutting edges for chips or coating damage before each use. Never exceed the tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.