Accupro 95139139 Corner Radius End Mill 5/8 in 3 Flute

Product Description

The ACCUPRO 95139139 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 5/8 inch diameter, a 0.0300 inch corner radius, and a 3-flute right-hand spiral geometry that promotes efficient chip evacuation and smooth surface finishes. The ZrN (zirconium nitride) coating improves heat resistance and extends tool life in demanding cutting environments. With a 37-degree helix angle and ultra-fine micrograin carbide substrate, this end mill holds tight tolerances and handles extended-reach applications. It is single-end, centercutting, and mounts via a Smart-Weldon shank.

This end mill suits CNC machining centers and manual mills in job shop, production, and toolroom environments. The 1-1/4 inch length of cut and 4 inch overall length make it well suited for profiling, slotting, and contouring operations where a radiused corner is required to reduce stress concentrations in the workpiece. The extended-reach designation and Smart-Weldon shank provide added rigidity and runout control. Machinists and CNC operators working on molds, dies, aerospace components, or general precision parts will find this tool appropriate for those applications.

Key Features

• Solid carbide construction with ultra-fine micrograin substrate for rigidity and edge retention
• ZrN coating improves thermal resistance and reduces built-up edge in high-speed cuts
• 0.0300 inch corner radius with tolerance of +0.00000 to -0.00100 inches for controlled corner geometry
• 37-degree helix angle promotes smooth chip flow and reduced cutting forces
• Centercutting design allows plunge entry without a pre-drilled pilot hole
• Smart-Weldon shank with h6 tolerance for consistent tool holding and minimal runout
• Maximum TIR of 0.0004 inches supports precision surface finish requirements

Compatibility

Designed for use in standard 5/8 inch tool holders and collets compatible with Smart-Weldon shank profiles. Suitable for CNC machining centers and milling machines that accept 5/8 inch shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill. Verify tool holder cleanliness and proper torque on set screws or collet nuts per the tool holder manufacturer specifications. Confirm runout at the cutting edge before beginning a production run to avoid premature tool wear or part rejection.