Hertel E203302401 Square End Mill 3/8 in 2 Flute Cobalt

Product Description

The HERTEL E203302401 is a cobalt square end mill designed for general-purpose milling operations in ferrous and high-temperature alloy materials. Built from M42 cobalt high-speed steel, this single-end tool delivers a 3/8 inch cutting diameter with a 1 inch length of cut. The uncoated finish and 30-degree helix angle promote efficient chip evacuation during slotting, profiling, and peripheral milling. It is centercutting, allowing direct plunge entry into the workpiece. Machinists and tool-and-die professionals working on manual or CNC milling machines use this end mill for precise metal removal in tight-tolerance applications.

This end mill is suited for milling centers, knee mills, and CNC machining centers running ferrous metals, tool steels, and similar materials that benefit from cobalt tooling over standard HSS. The 3/8 inch shank diameter matches common collet and end mill holder sizes, making it straightforward to install in standard ER-style or straight-bore toolholders. The 2-flute geometry provides generous gullet space for chip clearance, making it a practical choice for slotting and pocketing operations where chip packing is a concern.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance over standard HSS
• 30-degree helix angle with spiral flute geometry for smooth cutting action and efficient chip flow
• Centercutting design allows direct plunge cuts without pre-drilling
• Right-hand cut and right-hand flute configuration for standard spindle rotation
• Uncoated finish suitable for use with cutting fluid in ferrous material applications
• 2-flute design maximizes chip clearance for slotting and deep-pocket milling

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill for standard 3/8 inch collets, ER collet chucks, and straight-bore end mill holders on manual and CNC milling machines.

Installation Notes

Installation should be performed by a qualified machinist following safe tooling practices. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the holder. Seat the shank to the recommended engagement depth in the collet or holder and torque the retention hardware per the toolholder manufacturer's specifications. Confirm runout with a dial indicator before beginning the cut to protect both the tool and the workpiece.