Hertel 750321 Square End Mill 7/16 in 4 Flute Solid Carbide

Product Description

The HERTEL 750321 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineered materials. With a 7/16 inch (0.4375 inch) cutting diameter and a 3 inch length of cut, it handles slotting, profiling, and peripheral milling in a single setup. The four-flute, spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and smooth surface finishes. The uncoated solid carbide construction delivers rigidity and edge retention suited to demanding shop environments. Licensed machinists and CNC programmers are the primary users of this tool.

This end mill is well suited for use in vertical and horizontal machining centers as well as manual knee mills. The 6 inch overall length and 7/16 inch shank diameter make it a strong fit for applications requiring extended reach without sacrificing tool stiffness. The centercutting geometry allows direct plunge entry, adding flexibility in complex contouring and pocket-milling operations. It is intended for right-hand spindle rotation with right-hand flutes, which is the standard configuration for most CNC and conventional milling equipment.

Key Features

• Solid carbide construction for rigidity and long edge life
• 4-flute spiral design with 30-degree helix angle for efficient chip evacuation
• Centercutting geometry allows direct plunge milling
• Right-hand cut and right-hand flute direction for standard spindle use
• Uncoated finish — suitable for re-sharpening or use with compatible cutting fluids
• 7/16 inch shank matches standard collet and end mill holder sizes

Compatibility

Designed as a direct-fit replacement for standard 7/16 inch shank end mill holders, ER collets, and Weldon-style holders used in CNC machining centers and conventional milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank with the appropriate collet or end mill holder torqued per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning a cut, particularly on tight-tolerance operations.