Hertel 84213958 Roughing End Mill 5/8 in 4 Flute Cobalt

Product Description

The HERTEL 84213958 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel and coated with Titanium Nitride (TiN), it delivers hardness and wear resistance suited for ferrous metals and tough alloys. The cutter measures 5/8 inch (0.6250 inch) in diameter with a matching 5/8 inch shank, a 2.5-inch length of cut, and a 4.625-inch overall length. The fine-pitch, 4-flute geometry produces a controlled chip load for smooth stock removal. Cutting direction and flute direction are both right-hand. This tool is installed and used by machinists and tooling technicians in job shop and production environments.

This roughing end mill is intended for use in vertical milling machines, knee mills, and CNC machining centers where rapid material removal is the primary objective. The fine pitch configuration reduces chatter and vibration during heavy cuts, making it well suited for profiling, slotting, and side milling passes on steel, alloy steel, and similar ferrous workpiece materials. It is a single-end, non-centercutting design, meaning it is not intended for plunge cutting and should be entered into the workpiece from the side or via a ramp entry. No extended reach or variable helix geometry is present.

Key Features

• M42 cobalt steel construction for heat and wear resistance in hard materials
• Titanium Nitride (TiN) coating extends tool life and reduces friction
• 5/8 inch diameter with 5/8 inch straight shank for standard collet and end mill holder fitment
• 2.5-inch length of cut suitable for moderate-depth profiling passes
• Fine-pitch, 4-flute design reduces chatter during heavy roughing cuts
• Right-hand cut and right-hand flute orientation — standard for most milling setups

Compatibility

Designed as a standard-shank roughing end mill for use with 5/8 inch end mill holders, collet chucks, or Weldon-style holders in vertical mills and CNC machining centers.

Installation Notes

Installation and tool changes should be performed only after the spindle is fully stopped and the machine is in a safe, powered-down state. Secure the shank fully within the holder to the minimum insertion depth recommended by the holder manufacturer. Because this is a non-centercutting tool, avoid direct plunge entry into solid material. Tooling selection and feeds and speeds should comply with the machine manufacturer guidelines and applicable shop safety procedures.