Hertel E2030920 Square End Mill 1-1/8 in 2 Flute Cobalt

Product Description

The HERTEL E2030920 is a cobalt square end mill designed for milling operations that demand toughness and heat resistance. Built from M42 cobalt high-speed steel, this tool delivers reliable performance in ferrous and hard materials where standard HSS tooling falls short. It features a 1-1/8 inch cutting diameter, a 1-5/8 inch length of cut, and a 30-degree spiral helix angle that promotes efficient chip evacuation. The right-hand cut, right-hand flute geometry with two flutes makes it well suited for slotting, profiling, and peripheral milling applications. Machinists and tool-and-die professionals are the primary users of this end mill.

This end mill is a regular-length, single-end design with a 3/4 inch shank diameter and a 3-7/8 inch overall length. The centercutting geometry allows for direct plunge entry into the workpiece, expanding its use in contouring and pocket milling without a pre-drilled entry point. The uncoated finish makes it easy to resharpen, extending tool life through multiple grinds. It is appropriate for manual mills, CNC vertical machining centers, and knee mills where a 3/4 inch collet or end mill holder is available.

Key Features

• M42 cobalt construction for improved hardness and heat resistance compared to standard HSS
• 1-1/8 inch cutting diameter with 1-5/8 inch length of cut for substantial material removal
• 30-degree helix spiral flute promotes smooth cutting action and efficient chip clearance
• Centercutting design allows direct plunge milling without a pilot hole
• Right-hand cut and right-hand flute geometry for standard spindle rotation
• Uncoated surface supports resharpening for extended tool life

Compatibility

Designed for use in standard 3/4 inch end mill holders, collet chucks, or Weldon-style holders on vertical machining centers, CNC mills, and manual knee mills requiring a regular-length square end mill.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill. Seat the shank to the full recommended engagement depth in the holder and torque the set screw or collet nut to the holder specification. Verify runout with a dial indicator before initiating a cut, as excessive runout accelerates wear and can cause chatter or tool breakage.