Helical Solutions 81861 Corner Radius End Mill 1/4 in 5 Flute

Product Description

The HELICAL SOLUTIONS 81861 is a 5-flute, solid carbide corner radius end mill designed for high-performance material removal in demanding machining environments. Built on the HEV-5 series platform, it features a 0.060-inch corner radius, a 1/4-inch cutting diameter, and a 3/4-inch length of cut. The Tplus PVD coating extends tool life in abrasive and work-hardening materials. With a variable pitch design and centercutting geometry, this end mill handles both roughing and finishing operations in a single tool. It is installed and run by machinists and CNC operators working with precision toolholding systems.

This end mill is engineered for primary use in stainless steel, superalloys, and titanium, where edge integrity and thermal resistance are critical. Secondary applications include non-ferrous metals and hard materials. The single-end, right-hand cutting and right-hand flute direction make it suited for standard CNC milling setups. The 2.5-inch overall length and 1/4-inch straight cylindrical shank provide rigid setup in high-precision toolholders on vertical and horizontal machining centers.

Key Features

• 5-flute solid carbide construction for rigidity and fine surface finish
• 0.060-inch corner radius reduces stress concentration and extends insert life at corners
• Tplus PVD coating optimized for stainless steel, superalloys, and titanium
• Variable pitch geometry reduces harmonic vibration during aggressive cuts
• Centercutting design allows plunge entry without a pre-drilled hole
• Handles both roughing and finishing operations in a single pass setup

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials are stainless steel, superalloys, and titanium; secondary materials include non-ferrous metals and hard materials. Part of the HELICAL SOLUTIONS HEV-5 series.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC operator. Secure the 1/4-inch shank in a high-precision toolholder to maintain TIR within specification and protect the cutting edge. Confirm spindle speed, feed rate, and depth of cut against the machine tool builder recommendations and material-specific cutting data before running. Inspect the tool for edge chipping or coating wear before each use and replace when dimensional tolerances can no longer be held.