Hertel E2041040 Square End Mill 5/8 Inch Cobalt 4 Flute

Product Description

The HERTEL E2041040 is a cobalt square end mill designed for metal removal in demanding milling applications. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention when cutting ferrous metals, stainless steels, and high-temperature alloys. The cutter measures 0.625 inches in diameter with a 4-inch length of cut and an overall length of 6.125 inches, placing it in the extra-long reach category. Four spiral flutes with a 30-degree helix angle promote efficient chip evacuation and a smooth cutting action. The uncoated finish makes it straightforward to resharpen when edge life is exhausted.

This end mill is suited for production and job-shop machining environments where extra-long reach is required to access deep pockets, slots, or stepped features. The centercutting geometry allows direct plunge entry without a pre-drilled hole, giving machinists flexibility in toolpath planning. Right-hand cut and right-hand flute configuration match standard CNC and manual vertical milling setups. The 0.625-inch shank diameter fits standard collet chucks, end mill holders, and Weldon-style tool holders commonly found in vertical machining centers and knee mills.

Key Features

• M42 cobalt construction for heat resistance and edge retention in tough materials
• 4-inch length of cut provides extra-long reach for deep pockets and slots
• 30-degree helix angle spiral flutes promote efficient chip evacuation
• Centercutting geometry allows direct plunge entry
• Right-hand cut and right-hand flute for standard milling spindle compatibility
• Uncoated finish simplifies resharpening

Compatibility

Designed as an OEM-style replacement or standard tooling selection for vertical machining centers, knee mills, and CNC milling machines accepting a 0.625-inch shank diameter in collet chucks, end mill holders, or Weldon-style tool holders.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool holder is clean and free of chips before seating the shank. Verify runout with a dial indicator after mounting to minimize premature edge wear. Follow the machine manufacturer and tooling manufacturer guidelines for speeds, feeds, and depth of cut based on workpiece material.