Hertel EM250016 Ball End Mill 0.25 in 4 Flute Carbide

Product Description

The HERTEL EM250016 is a solid carbide ball end mill designed for precision milling operations in ferrous and hardened materials. It features a 0.25 inch cutting diameter, a 0.75 inch length of cut, and a 4-flute geometry that supports both roughing and finishing passes. The AlTiN coating provides elevated heat resistance and extended tool life when machining at higher surface speeds. The 30-degree helix angle promotes efficient chip evacuation and reduces cutting forces. With an overall length of 2.5 inches and a 0.25 inch shank diameter, this tool fits standard collet and end mill holders. It is manufactured from micrograin carbide substrate for consistent edge retention.

This end mill is suited for CNC machining centers and manual mills used in toolroom, production, and job shop environments. Typical applications include 3D contour milling, slotting, and profiling in steel, stainless steel, cast iron, and similar hard materials where AlTiN coating performance is advantageous. The single-end, right-hand cut configuration makes it a standard workhorse for general-purpose milling tasks in industrial settings.

Key Features

• 0.25 inch cutting diameter with 0.75 inch length of cut for controlled engagement
• 4-flute design supports both roughing and semi-finish milling
• AlTiN coating for high-temperature resistance and extended tool life in ferrous materials
• 30-degree helix angle promotes chip evacuation and reduces heat buildup
• Micrograin solid carbide substrate for sharp, durable cutting edges
• Single-end, right-hand cut with right-hand flute direction for standard spindle use

Compatibility

Designed as an OEM-style replacement or direct application tool for standard 0.25 inch collet chucks, shrink-fit holders, and end mill holders used on CNC machining centers and manual mills.

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 tool. Use a properly sized collet or toolholder to achieve the manufacturer-recommended grip length and minimize runout. Follow shop safety protocols and applicable ANSI machining standards when setting feeds, speeds, and depth of cut.