Accupro 12180382 Corner Rounding End Mill 1/4 in 4 Flute Ticn

Product Description

The ACCUPRO 12180382 is a double-end, solid carbide corner rounding end mill designed for machining precise convex radii on workpiece edges. It carries a 0.046 inch radius and a 0.25 inch mill diameter with a tip diameter of 0.153 inches. The tool features a TiCN (Titanium Carbonitride) coating that improves surface hardness and wear resistance compared to uncoated carbide. With 4 flutes and right-hand cutting and flute geometry, it is suited for finishing passes on ferrous and non-ferrous materials in CNC milling applications. Machinists and tool-and-die professionals are the primary users of this type of end mill.

This end mill is used in CNC machining centers and manual milling operations where consistent edge rounding and radius blending are required. The double-end design provides two usable cutting ends, extending tool life and reducing per-part tooling cost. Typical applications include edge prep on mold components, die parts, and general precision machined components where a controlled radius must be held to close tolerance. The 1/4 inch shank diameter fits standard ER and straight-bore collet systems commonly found in vertical machining centers and CNC routers.

Key Features

• Double-end design provides two cutting ends for extended tool service life
• Solid carbide construction delivers rigidity and dimensional stability at higher cutting speeds
• TiCN coating increases surface hardness and reduces built-up edge on ferrous materials
• 0.046 inch corner radius suited for fine edge rounding and blending operations
• Right-hand cut and right-hand helix geometry for standard CNC milling spindle compatibility
• 4-flute configuration supports smooth surface finish on finishing passes

Compatibility

Designed as an OEM-style replacement or direct-use corner rounding end mill for CNC machining centers and manual mills accepting a 1/4 inch straight shank. No specific machine model compatibility was stated in the product data.

Installation Notes

Installation of end mills should be performed by a qualified machinist following shop safety procedures. Always power down and lock out the spindle before changing tooling. Secure the 1/4 inch shank in a properly sized collet or end mill holder and torque to the collet nut specification listed by the toolholder manufacturer. Verify runout with a dial indicator before taking the first cut, as excessive runout accelerates edge wear and reduces radius accuracy.