Helical Solutions 59321 Corner Radius End Mill 1/2 in 6 Flute

Product Description

The HELICAL SOLUTIONS 59321 is a 6-flute corner radius end mill ground from solid carbide and coated with a proprietary APLUS PVD coating. It carries a 1/2-inch mill diameter, a 0.0600-inch corner radius, and a 5/8-inch length of cut, making it well suited for both roughing and finishing operations in a single tool. The 2.5-inch overall length and straight cylindrical 1/2-inch shank keep the tool compact for stub-length reach applications. Right-hand cutting and right-hand flute spiral combine with a variable pitch design to reduce harmonic chatter during aggressive cuts.

This end mill is built for machining steel, cast iron, stainless steel, non-ferrous metals, superalloys, titanium, and hard materials. It belongs to the HEV-6 series and is intended for use in high-precision toolholders on CNC machining centers running demanding ferrous and exotic-material programs. The variable index geometry distributes cutting forces unevenly around the cutter body, suppressing vibration during deep-side or full-slot passes. It is a single-end, centercutting design, allowing plunge entry where required.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and hard-material applications
• APLUS PVD coating reduces friction and extends tool life in steel, cast iron, and titanium
• Variable pitch (variable index) flute spacing minimizes chatter and harmonics during high-feed cuts
• 0.0600-inch corner radius with a tight tolerance of -0.0020 to 0.0020 inches protects workpiece edges and reduces stress risers
• Centercutting design allows axial plunge entry without a pre-drilled pilot hole
• Right-hand cut, right-hand spiral, 6-flute configuration optimized for roughing and finishing in one operation

Compatibility

Designed for use with high-precision toolholders. Primary workpiece materials include low-alloy steel, medium alloy steel, tool steel, and cast iron (ISO material codes P and K). Secondary materials include stainless steel, non-ferrous metals, superalloys, titanium, and hard materials (ISO codes M, N, S, and H).

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Seat the straight cylindrical shank fully in a high-precision collet or shrink-fit toolholder and verify runout against the TIR maximum of 0.0005 inches before running the spindle. Confirm spindle direction is set to right-hand rotation before engaging the cut. Follow the toolholder manufacturer torque and clamping specifications; do not overtighten set-screw holders against the shank as this can induce runout or damage the shank diameter tolerance (h6).