Hertel 750257 Square End Mill 3/8 in 4 Flute Solid Carbide

Product Description

The HERTEL 750257 is a solid carbide square end mill designed for precision milling operations in metal fabrication, tool-and-die, and general machining environments. It features a 3/8 inch cutting diameter, a 5/8 inch length of cut, and a 2 inch overall length on a 3/8 inch shank. The four-flute, spiral-flute geometry with a 30-degree helix angle promotes efficient chip evacuation and surface finish quality. The micrograin carbide substrate provides edge retention in demanding cuts, and the AlTiN coating adds heat resistance for dry or semi-dry machining. This tool is installed and operated by machinists and CNC programmers working on mills, machining centers, and manual knee mills.

The HERTEL 750257 is suited for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials where a stub-length tool is appropriate. The stub length classification limits deflection, making it a practical choice for rigid setups in tight axial reach situations. Right-hand cut and right-hand flute orientation are standard for conventional spindle rotation on most vertical and horizontal machining centers. The centercutting capability allows plunge entry without a pre-drilled pilot hole, supporting ramp and helical interpolation entry strategies.

Key Features

• Solid micrograin carbide construction for edge retention and rigidity
• AlTiN coating for elevated heat resistance in dry and semi-dry machining
• 4-flute spiral geometry with 30-degree helix for efficient chip flow and improved finish
• Centercutting design supports direct plunge, ramp, and helical entry
• Stub length (5/8 inch LOC) minimizes deflection in rigid fixturing setups
• Right-hand cut and right-hand flute for standard spindle rotation compatibility

Compatibility

Designed as an OEM-style solid carbide square end mill for use in standard 3/8 inch collet chucks, end mill holders, and shrink-fit tooling systems on CNC and manual milling machines.

Installation Notes

Install in a clean, properly sized collet or end mill holder and torque to the toolholder manufacturer specification before use. Confirm spindle speed and feed rate are set per material and coating recommendations before engaging the cut. Inspect the cutting edges and coating condition prior to each run; a chipped or worn edge increases the risk of tool breakage and workpiece damage. This tool is intended for use by qualified machinists familiar with CNC or manual milling machine operation.