Hertel E7020016 Ball End Mill 0.25in 4 Flute Cobalt Ticn

Product Description

The HERTEL E7020016 is a single-end ball end mill designed for precision milling operations in metalworking and machining applications. Built from M42 cobalt high-speed steel, it offers superior heat and wear resistance compared to standard HSS tooling. The cutting end is finished with a TiCN (Titanium Carbonitride) coating, which further extends tool life and reduces friction at the cutting edge. At 0.25 inches in diameter with a 0.625-inch length of cut and a 30-degree right-hand helix, this mill is suited for profiling, slotting, and contouring passes requiring a ball-nose geometry. Licensed machinists and toolroom professionals are the primary installers and operators.

This end mill fits standard CNC machining centers, vertical mills, and manual knee mills equipped with an ER or collet chuck sized for a 3/8-inch shank. The 0.25-inch ball nose diameter makes it a practical choice for finishing passes on curved surfaces, cavities, and three-dimensional contour work in ferrous and nonferrous metals. Its regular-length configuration at 2.4375 inches overall length provides adequate reach for most production and toolroom setups without sacrificing rigidity.

Key Features

• M42 cobalt construction for elevated heat resistance and extended tool life in demanding cuts
• TiCN coating reduces friction and improves wear resistance over uncoated HSS tooling
• 4-flute spiral design provides a smooth finish and efficient chip evacuation
• 30-degree right-hand helix balances cutting forces and surface finish quality
• Single-end ball nose geometry suited for 3D contouring and profiling operations
• 3/8-inch shank diameter for broad compatibility with standard collet and chuck systems

Compatibility

Designed for use in CNC and manual milling machines accepting a 3/8-inch round shank. Suitable for cutting ferrous and nonferrous metals where cobalt tooling is specified.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or in a safe lockout state before changing tooling. Seat the shank fully in the collet or chuck and torque the retention nut to the machine and toolholder specification. Verify runout with a dial indicator before beginning a production cut.