Hertel EM249020 Ball End Mill 0.3125 in 2 Flute Solid Carbide

Product Description

The HERTEL EM249020 is a single-end ball end mill designed for contour milling, slotting, and 3D profiling in ferrous and nonferrous materials. Built from micrograin solid carbide, it delivers the rigidity and edge retention needed for demanding cutting applications. The 0.3125 inch (5/16 inch) cutting diameter pairs with a 0.8125 inch length of cut and a 30-degree helix angle to promote smooth chip evacuation and reduce chatter. An AlTiN coating adds thermal resistance and surface hardness, extending tool life in dry or high-speed cutting conditions. This tool is installed and operated by machinists and CNC programmers in shop and production environments.

This end mill is suited for finish and semi-finish milling passes on dies, molds, and complex contoured workpieces. The ball nose geometry allows full 3D surface contact, making it a standard choice for CNC machining centers running ferrous alloys, hardened steels, and similar materials. The right-hand cutting and right-hand flute direction are consistent with standard spindle configurations on vertical and horizontal machining centers.

Key Features

• Micrograin solid carbide construction for high rigidity and wear resistance
• AlTiN coating provides thermal stability and extended tool life in high-speed cutting
• 0.3125 inch (5/16 inch) ball nose diameter for precise contour and 3D profiling work
• 30-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Right-hand cut and right-hand flute direction for use in standard CNC spindles
• Single-end design; 2.5 inch overall length with 5/16 inch shank diameter

Compatibility

Designed as a standard 5/16 inch shank ball end mill compatible with CNC machining center collet chucks, end mill holders, and shrink-fit toolholders accepting a 0.3125 inch shank diameter.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in a safe, locked-out state. Secure the shank in a properly sized collet or end mill holder and torque the retention mechanism per the toolholder manufacturer specification. Inspect the cutting edges and coating for chips or damage before each use. Follow shop-specific speeds, feeds, and depth-of-cut parameters established for the workpiece material and machine setup.