Helical Solutions 81761 Corner Radius End Mill 1/2 in 5 Flute

Product Description

The HELICAL SOLUTIONS 81761 is a 5-flute, solid carbide corner radius end mill designed for high-performance material removal in both roughing and finishing operations. Built on the HEV-5 series platform, it features a 1/2 inch diameter with a 0.0200 inch corner radius and a variable pitch design that reduces harmonic vibration during aggressive cuts. The APLUS PVD coating extends tool life when working in steel, cast iron, stainless steel, non-ferrous metals, superalloys, and titanium. At 2.5 inches overall length with a 0.6250 inch length of cut, this is a stub-length tool suited for rigid setups where deflection control is critical.

This end mill is intended for professional machinists and CNC operators running high-precision toolholders in production or job shop environments. It is centercutting and right-hand cutting with a right-hand spiral flute direction, making it suitable for plunge entry and conventional or climb milling passes. Primary workpiece materials are steel and cast iron, with secondary capability across stainless steel, non-ferrous metals, superalloys, and titanium. The straight cylindrical shank matches the 1/2 inch diameter for straightforward installation in collet chucks and end mill holders.

Key Features

• 5-flute variable pitch geometry reduces chatter and supports both roughing and finishing in a single tool
• APLUS PVD coating rated for steel, cast iron, stainless steel, non-ferrous metals, superalloys, and titanium
• 0.0200 inch corner radius (0.50 mm) with a tight tolerance of -0.0020 to 0.0020 inches protects corners and extends part life
• Solid carbide construction with stub-length design maximizes rigidity and minimizes deflection
• Centercutting capability allows direct plunge entry without a pre-drilled hole
• TIR maximum of 0.0005 inches supports high-precision toolholder compatibility

Compatibility

Designed for use with high precision toolholders. Compatible across primary workpiece materials steel and cast iron (ISO P, K) and secondary materials stainless steel, non-ferrous metals, superalloys, and titanium (ISO M, N, S, H).

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the straight cylindrical shank in a clean, properly sized collet or end mill holder torqued to the toolholder manufacturer specification before running. Verify runout does not exceed the 0.0005 inch TIR maximum after clamping. Do not exceed the recommended depth of cut or feed rate for the workpiece material and machine setup.