Hertel E2021048 Ball End Mill 0.75 in 4 Flute Cobalt

Product Description

The HERTEL E2021048 is a cobalt ball end mill designed for milling operations requiring a full-radius cutting profile at the tip. Built from M42 cobalt high-speed steel, it delivers strong heat and wear resistance in demanding cutting environments. The 0.75-inch diameter, 4-flute geometry produces a smooth finish on contoured surfaces, cavities, and 3D profiles. With a 3-inch length of cut and a 5.25-inch overall length, this tool suits both roughing and finishing passes where reach and rigidity are priorities. Licensed machinists and tool-and-die professionals are the primary users. It ships uncoated and is ready for use as delivered or with a shop-applied coating.

This end mill is suited for machining steel, alloy steel, stainless steel, and similar ferrous materials where cobalt tooling excels over standard HSS. A 30-degree helix angle promotes smooth chip evacuation and reduces chatter on vertical machining centers and manual knee mills. The single-end configuration and right-hand cutting direction make it a direct fit for conventional CNC milling setups. It is well matched to profiling, slotting, and contouring work in job shops, tool rooms, and production machining environments.

Key Features

• M42 cobalt construction resists heat buildup during aggressive cuts in ferrous materials
• Ball-end geometry generates full-radius profiles for 3D contouring and cavity work
• 4-flute design balances chip evacuation with surface finish quality
• 30-degree right-hand spiral helix reduces chatter and promotes clean chip flow
• Uncoated finish allows direct use or application of a shop-specified coating
• Single-end configuration with 0.75-inch shank diameter for standard collet or end mill holder fitment

Compatibility

Designed as an OEM-style replacement or direct tooling option for CNC vertical machining centers, knee mills, and manual milling machines accepting a 0.75-inch shank end mill holder or collet.

Installation Notes

Installation is performed by a machinist or tool-room technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the 0.75-inch shank in a properly sized collet or end mill holder torqued to the machine manufacturer's specification. Inspect the cutting edges for damage before each use and confirm runout with a dial indicator before beginning a cut.