Helical Solutions 81420 Corner Radius End Mill 1/8 in

Product Description

The HELICAL SOLUTIONS 81420 is a 3-flute solid carbide corner radius end mill designed for high-performance material removal in both roughing and finishing operations. With a 0.1250-inch mill diameter, a 0.0300-inch corner radius, and a 0.2500-inch length of cut, this tool is built for precision work in tight tolerances. The Zplus PVD coating provides wear resistance and thermal stability, extending tool life across a range of workpiece materials. The variable pitch, high helix flute geometry reduces chatter and improves chip evacuation. It is center-cutting and configured for right-hand cutting in a single-end, stub-length format.

This end mill is primarily suited for machining aluminum and non-ferrous metals, with secondary capability in steel, stainless steel, cast iron, high-temperature alloys, and hard materials. The stub-length body and 0.1250-inch straight-cylindrical shank make it well-suited for use in high-precision toolholders where runout control is critical. It is appropriate for CNC milling operations in job shop, production, and aerospace environments where finish quality and dimensional accuracy are required.

Key Features

• 0.0300-inch corner radius with tolerance of -0.0020 to 0.0020 inches for consistent edge geometry
• Zplus PVD coating optimized for aluminum and non-ferrous metal applications
• Variable pitch flute design reduces harmonic vibration and chatter during aggressive cuts
• Center-cutting capability allows plunge entry without a pre-drilled hole
• Right-hand helical flutes with high helix angle promote efficient chip evacuation
• TIR maximum of 0.0003 inches for tight runout control in precision toolholders

Compatibility

Part of the Helical Solutions H40ALV-3 series. 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.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Secure the shank in a high-precision toolholder to the manufacturer-specified clamping torque for the holder type in use. Confirm runout at the tool tip before beginning the cut, as TIR tolerance on this tool is 0.0003 inches. Verify spindle speed, feed rate, and depth of cut against published cutting data for the workpiece material before engaging the tool.