Robbjack C1-401-12 Square End Mill 3/8 in 4 Flute Carbide

Product Description

The ROBBJACK C1-401-12 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineering plastics. It features a 3/8-inch cutting diameter with a 7/8-inch length of cut, a 30-degree helix angle, and 4 spiral flutes in a right-hand cut, right-hand flute configuration. The uncoated C2-grade carbide construction delivers consistent edge integrity across a range of general-purpose machining applications. This tool is centercutting, allowing direct plunge entry. It is intended for use by machinists and tool-and-die professionals operating CNC mills or manual knee mills.

This end mill fits standard 3/8-inch collets or tool holders and is suited for slotting, profiling, and peripheral milling in both conventional and climb-milling setups. The regular-length geometry and 2-1/2-inch overall length make it appropriate for typical workpiece reach without sacrificing rigidity. It is commonly used in job shop, production, and maintenance machining environments where a dependable general-purpose square end mill is required.

Key Features

• Solid C2-grade carbide construction for wear resistance and edge retention
• 4-flute spiral design provides efficient chip evacuation and smooth finish
• 30-degree helix angle balances cutting forces across a range of materials
• Centercutting geometry allows plunge milling without a pre-drilled entry point
• Right-hand cut and right-hand flute configuration for standard CNC and manual mill spindles
• Uncoated finish suitable for applications where coating is not required or where regrinding is planned

Compatibility

Designed for use with standard 3/8-inch collets and tool holders in CNC machining centers and manual milling machines; part of the ROBBJACK C1-401 series of general-purpose solid carbide square end mills.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and locked out before inserting or removing the end mill from the collet or tool holder. Verify collet condition and clamping torque per the tool holder manufacturer specification before running. Do not exceed the recommended depth of cut or feed rate for the workpiece material and tool diameter.