Hertel E4175200 Square End Mill 2 in 6 Flute Cobalt

Product Description

The HERTEL E4175200 is a cobalt square end mill designed for heavy-duty milling operations in metalworking and machining environments. With a 2-inch mill diameter, 8-inch length of cut, and 11.75-inch overall length, this is an extra-long configuration built for deep-cavity and extended-reach applications where standard-length tools fall short. The 6-flute design improves chip load distribution and surface finish quality in ferrous materials. Manufactured from M42 cobalt high-speed steel, the tool delivers strong heat resistance and edge retention under aggressive cutting conditions. The bright, uncoated finish is suitable for general-purpose milling where coating is not required by the application.

This end mill is used in manual and CNC milling machines across production shops, tool and die operations, and maintenance machining environments. The extra-long length of cut makes it appropriate for deep pockets, mold cavities, and step-down roughing passes where a standard-length end mill cannot reach. It is a single-end tool with right-hand cutting and right-hand flute direction. The centercutting geometry allows plunge entry when needed. Machinists, tool and die makers, and CNC operators working with steel, alloy steel, and similar ferrous workpieces are the primary users of this tool.

Key Features

• M42 cobalt high-speed steel construction for heat resistance and edge retention in tough ferrous materials
• 6-flute design improves chip evacuation efficiency and surface finish compared to fewer-flute options
• 8-inch length of cut enables deep-pocket and extended-reach milling passes
• 30-degree helix angle balances cutting force and chip flow for general ferrous milling
• Centercutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Bright, uncoated finish suitable for applications where coating is not required

Compatibility

Designed as a direct-fit replacement or standard tooling option for milling machine spindles accepting a 2-inch straight shank in ER, end mill holders, or shell mill adapters; confirm holder bore and retention method before installation.

Installation Notes

Installation is performed by machinists using an appropriate end mill holder or collet chuck rated for 2-inch shank diameter. Ensure the spindle and toolholder are clean and free of chips or debris before seating the shank. Verify runout with a dial indicator after clamping, as runout directly affects tool life and surface finish on a 6-flute tool at this diameter. Always follow machine manufacturer torque specifications for the drawbar or retention knob being used.