Hertel E2020903 Ball End Mill 1.25 in 6 Flute Cobalt

Product Description

The HERTEL E2020903 is a single-end cobalt ball end mill designed for milling operations that require a full-radius cutting profile. Built from M42 cobalt high-speed steel, it delivers strong heat and wear resistance in tough ferrous and stainless materials. The 1.25-inch diameter cutting head features 6 spiral flutes with a 30-degree right-hand helix, generating smooth chip evacuation and consistent surface finish across the length of cut. At 4.5 inches overall length with a 2-inch length of cut, this tool suits standard machining centers and knee mills where rigidity and precision are required. Machinists and toolroom professionals handling interrupted cuts, contour work, or profiling operations will find this geometry well suited to production and job-shop environments.

This ball end mill is built for use in CNC machining centers, manual mills, and toolroom setups where a full-radius end profile is needed. Common applications include 3D contouring, die and mold work, slotting, and profiling in ferrous alloys, tool steels, and similar materials. The uncoated cobalt construction makes it a reliable choice where regrinding is part of the shop workflow. The 1.25-inch shank diameter matches standard ER or CAT toolholders sized for that bore, providing stable grip at full depth.

Key Features

• M42 cobalt high-speed steel construction for heat and abrasion resistance
• 6 spiral flutes with 30-degree right-hand helix for efficient chip evacuation
• Ball end geometry suited for 3D contouring, profiling, and die work
• Uncoated finish supports regrinding and reconditioning in-house
• Single-end design with right-hand cutting direction
• Regular length profile balances reach and rigidity for common milling setups

Compatibility

Designed as an OEM-style replacement or direct-use cobalt ball end mill for standard toolholders with a 1.25-inch bore, compatible with CNC machining centers and manual milling machines accepting that shank diameter.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the shank in a properly sized collet or end mill holder and verify runout before cutting. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool. Follow shop safety procedures and applicable machine tool standards when setting speeds and feeds for cobalt tooling in the target material.