Hertel E699924501 Ball End Mill 0.2031 in 2 Flute Solid Carbide

Product Description

The HERTEL E699924501 is a solid carbide ball end mill designed for precision milling operations in metal, hardened materials, and composites. It features a 0.2031-inch cutting diameter and a 0.625-inch length of cut, making it well suited for profiling, contouring, and 3D surfacing tasks. The tool carries a TiN (titanium nitride) coating that increases surface hardness and reduces friction at the cutting edge, extending tool life in production environments. With a right-hand cutting and right-hand flute direction, it runs on standard CNC machining centers and manual knee mills without special spindle configuration. Machinists and toolroom operators are the primary users.

This end mill fits small-diameter milling applications where a 1/4-inch shank is required. The 2.5-inch overall length keeps the tool rigid in close-tolerance work while still providing adequate clearance for most fixturing setups. Typical applications include die and mold work, aerospace component finishing, and general precision machining where a ball-nose profile is needed to generate smooth curved surfaces or undercuts. The 2-flute geometry supports chip evacuation in both ferrous and non-ferrous materials.

Key Features

• 0.2031-inch (13/64 inch) ball nose cutting diameter for fine-detail milling
• Solid carbide construction for rigidity and wear resistance in demanding cuts
• TiN coating reduces tool wear and improves lubricity at the cutting edge
• 2-flute design promotes chip clearance in slotting and profiling passes
• Right-hand cut and right-hand helix for use on standard CNC and manual spindles
• Single-end configuration with a 1/4-inch straight shank for common collet and end mill holders

Compatibility

Designed for use in standard 1/4-inch end mill holders, ER collet chucks, and similar toolholding systems on CNC machining centers and manual milling machines requiring a small-diameter solid carbide ball end mill.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Seat the shank fully into the collet or end mill holder and torque the retention mechanism to the toolholder manufacturer's specification. Confirm runout with a dial indicator before beginning a production cut, as excessive runout accelerates wear on small-diameter carbide tools.