Hertel 750427 Square End Mill 5/64 in 4 Flute Solid Carbide

Product Description

The HERTEL 750427 is a solid carbide square end mill designed for precision milling operations in metal, composites, and hard materials. With a 5/64 inch (0.0781 inch) mill diameter and a 3/16 inch (0.1875 inch) length of cut, this tool is built for tight-tolerance work in confined spaces. The micrograin carbide substrate paired with an AlTiN finish delivers heat resistance and edge retention at elevated cutting speeds. Four spiral flutes with a 30-degree helix angle promote efficient chip evacuation and smooth surface finishes. Centercutting capability allows plunge entry without a pre-drilled pilot hole. This end mill is installed and operated by machinists, tool-and-die makers, and CNC technicians.

This end mill suits general-purpose milling, slotting, profiling, and pocket milling in ferrous and non-ferrous metals, as well as hardened steels and exotic alloys where AlTiN coating provides thermal protection. The 1/8 inch shank diameter fits standard ER collet chucks, end mill holders, and milling machine spindles. The regular-length geometry and 1-1/2 inch overall length keep deflection low in high-speed CNC machining centers and manual mills alike. Typical applications include die and mold work, prototype machining, and precision component manufacturing.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• AlTiN finish for elevated heat resistance and extended tool life in ferrous materials
• 4 spiral flutes with 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge entry
• Right-hand cut and right-hand flute configuration for standard spindle operation
• Regular length geometry minimizes deflection in precision applications

Compatibility

Designed as a direct-fit replacement or upgrade for 1/8 inch shank square end mills in standard ER collet chucks and end mill holders used on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully de-energized and at a complete stop before changing tooling. Use a calibrated torque wrench when tightening the collet nut to the chuck specification. Confirm shank seating depth and runout with a dial indicator before beginning a cut to avoid tool pull-out or premature edge failure.