Accupro 311403 Corner Radius End Mill 3/16 in 5 Flute

Product Description

The ACCUPRO 311403 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hardened materials. It features a 3/16 inch diameter with a 0.030 inch corner radius, five flutes, and an AlCrTiN coating that provides high heat resistance and extended tool life in demanding cutting environments. The 38-degree helix angle and variable index flute spacing help reduce chatter and improve surface finish. At 2.5 inches overall length with a 0.75 inch length of cut, this single-end, center-cutting tool suits CNC machining centers and manual mills where controlled depth profiling and corner blending are required.

This end mill is suited for production and job shop environments running ferrous alloys, stainless steel, hardened tool steels, and similar difficult-to-machine materials. The micrograin solid carbide substrate combined with the AlCrTiN coating supports higher spindle speeds and feed rates compared to standard HSS tooling. It is installed and used by machinists and CNC operators in precision machining, toolroom, and manufacturing applications where consistent corner geometry is critical.

Key Features

• AlCrTiN coating for elevated heat and wear resistance in hard material cutting
• Five-flute design increases feed rate capability and improves finish quality
• Variable index fluting reduces harmonic vibration and chatter
• 0.030 inch corner radius extends tool life and reduces corner chipping on workpiece edges
• Center-cutting geometry allows plunge entry without a pre-drilled hole
• Micrograin solid carbide substrate supports tight tolerances and repeatable performance

Compatibility

Designed as a standard shank replacement end mill for CNC machining centers and manual milling machines accepting a 3/16 inch straight shank tool holder or collet.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine fully powered down and spindle locked before tool changes. Secure the shank fully within the collet or tool holder to the recommended engagement depth to prevent runout and pullout during cutting. Verify tool runout with a dial indicator before initiating cuts in critical applications. Follow the machine manufacturer and tooling supplier guidelines for speeds, feeds, and depth of cut appropriate to the workpiece material.