Accupro 72039969 Corner Radius End Mill 0.125 in 6 Flute

Product Description

The ACCUPRO 72039969 is a solid carbide corner radius end mill designed for high-performance milling in demanding materials. Built to the HS series specification, it features a 0.125-inch (1/8 inch) mill diameter and a 6-flute geometry with a variable helix and variable index configuration. The AlTiN+ coating delivers elevated heat resistance and tool life when cutting high-temperature alloys and other difficult workpiece materials. At 1.5 inches overall length with a 0.25-inch length of cut, this is a compact tool suited for finishing and semi-finishing operations where precision edge control and corner geometry are critical.

This end mill is engineered primarily for high-temperature alloy (material code S) applications, including nickel-based superalloys, titanium, and similar hard-to-machine materials commonly found in aerospace, power generation, and medical component manufacturing. The single-end, center-cutting design allows plunge entry and right-hand cutting with right-hand flute direction. The 0.020-inch corner radius protects the cutting edge and reduces stress concentration at corners, extending tool life in high-load finishing passes.

Key Features

• Solid carbide construction for rigidity and wear resistance in high-temp alloys
• AlTiN+ coating for elevated thermal resistance and extended tool life
• 6-flute variable helix and variable index design reduces chatter and improves surface finish
• 0.020-inch (0.51 mm) corner radius protects the cutting edge at workpiece corners
• Center-cutting geometry allows direct plunge entry
• AlTiN+ coating suited for dry or minimal-lubrication cutting strategies

Compatibility

Designed for use in high-temperature alloy (S-material) milling applications. Primary workpiece material designation is high-temp alloy per the supplier specification. Confirm shank and collet compatibility before installation.

Installation Notes

This tool is installed by machinists or CNC tooling technicians in milling machines or machining centers using a compatible 0.125-inch collet or end mill holder. Ensure the machine spindle and tool holder are clean and free of chips before seating the shank. Verify runout with a dial indicator before beginning a production cut, particularly given the small diameter. Follow the tooling manufacturer and machine builder guidelines for speeds, feeds, and depth of cut for the specific workpiece material.