Helical Solutions 82426 Corner Radius End Mill 1/4in 3 Flute

Product Description

The HELICAL SOLUTIONS 82426 is a solid carbide corner radius end mill designed for high-performance material removal in both roughing and finishing operations. It features a 1/4 inch diameter, a 0.0600 inch corner radius, and a 1-1/4 inch length of cut, with a 3-inch overall length and a 1/4 inch straight cylindrical shank. The three-flute geometry runs in a right-hand spiral with a high helix angle of 40 degrees and variable pitch indexing, reducing harmonic chatter during aggressive cuts. A Zplus PVD coating provides thermal resistance and edge lubricity. This tool is installed by machinists and CNC operators in precision machining environments.

The 82426 is engineered primarily for aluminum and non-ferrous metals, with secondary capability across steel, stainless steel, cast iron, high-temperature alloys, and hard materials. The Series H40ALV-3 designation places it in Helical Solutions long-reach, high-helix line suited for deep-cavity and slotting operations. The centercutting configuration allows plunge entry. The tool is specified for use with high-precision toolholders to maintain the 0.0003 inch maximum TIR rating. Typical applications include mold work, aerospace components, and general CNC profiling where edge quality and corner definition matter.

Key Features

• 0.0600 inch corner radius with a tolerance of -0.0020 to 0.0020 inches for consistent corner definition
• Three-flute, right-hand spiral geometry with 40-degree high helix for efficient chip evacuation
• Variable pitch (variable index) construction reduces chatter and vibration during high-feed passes
• Zplus PVD coating rated for aluminum and non-ferrous primary applications with multi-material secondary capability
• Centercutting design permits direct plunge entry without a pre-drilled pilot hole
• Solid carbide construction with h6 tolerance on both mill diameter and shank diameter for repeatable runout

Compatibility

Designed for use with high-precision toolholders. Primary workpiece material is aluminum and non-ferrous metals; secondary workpiece materials include steel, stainless steel, cast iron, high-temperature alloys, and hard materials. Part of the Helical Solutions Series H40ALV-3 long-flute corner radius line.

Installation Notes

This tool is installed by CNC machinists and toolroom operators. Before changing or setting tooling, ensure the machine spindle is fully stopped and the controller is in a safe state. Use a high-precision collet or hydraulic toolholder to stay within the 0.0003 inch maximum TIR specification — standard ER collets with excessive wear may compromise this tolerance. Inspect the cutting edges and coating for chips or wear before each setup.