Hertel E4030909 Square End Mill 1 in 2 Flute Cobalt Tin

Product Description

The HERTEL E4030909 is a 1-inch diameter square end mill designed for general-purpose milling operations in metalworking environments. Manufactured from M42 cobalt high-speed steel, this tool handles demanding cuts in tough ferrous and non-ferrous materials where standard HSS tooling falls short. A titanium nitride (TiN) coating reduces friction and extends tool life at the cutting edge. The 2-flute spiral geometry with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Centercutting capability allows plunge milling in addition to peripheral and face cuts, giving machinists flexibility across multiple operations.

This end mill is suited for job shops, toolrooms, and production machining applications requiring reliable material removal in steel, alloy steel, cast iron, and similar materials. The 3/4-inch shank diameter fits standard ER collets and milling chucks commonly found on vertical machining centers, knee mills, and CNC mills. With a 1-1/2-inch length of cut and a 3-3/4-inch overall length, this is a regular-length tool appropriate for typical depth-of-cut requirements without excessive overhang.

Key Features

• M42 cobalt HSS construction for improved hardness and heat resistance over standard M2 HSS
• TiN coating reduces cutting friction and improves wear resistance
• 30-degree helix spiral flute promotes smooth chip flow and reduces cutting forces
• Centercutting design allows plunge entry without pre-drilling
• Right-hand cut, right-hand flute configuration for standard spindle operation
• 2-flute geometry provides open chip clearance for higher feed rates in softer materials

Compatibility

Designed as an OEM-style replacement or direct-use tooling for milling applications requiring a 1-inch diameter, 3/4-inch shank square end mill with a regular-length profile.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the shank fully within the collet or chuck to the recommended engagement depth before tightening to prevent pullout under cutting loads. Ensure the spindle and workholding are fully stopped before changing tooling. Follow machine manufacturer guidelines for maximum RPM, feed rate, and depth of cut for cobalt end mills in the workpiece material being machined.