Cleveland C42694 Square End Mill 3/8 in 4 Flute Cobalt

Product Description

The CLEVELAND C42694 is a 4-flute cobalt square end mill designed for high-performance metal removal in demanding machining applications. Built from M42 cobalt high-speed steel, this end mill delivers superior heat and wear resistance compared to standard HSS tooling. The 3/8 inch cutting diameter pairs with a 3/4 inch length of cut and a 2-1/2 inch overall length, making it well-suited for slotting, profiling, and peripheral milling operations. The 30-degree spiral flute geometry promotes efficient chip evacuation and smooth cutting action. It ships uncoated and ready to run straight out of the package.

This end mill is intended for use on ferrous materials including stainless steel, alloy steel, and high-temperature alloys. The HGC-4C series is built for shops running tougher workpiece materials where standard HSS tooling loses its edge prematurely. Typical applications include mold work, aerospace component machining, and general metalworking on manual mills and CNC machining centers. The straight-cylindrical shank with Weldon flat accommodates standard end mill holders and set-screw toolholders commonly found in production environments.

Key Features

• M42 cobalt construction provides elevated red hardness and extended tool life on difficult alloys
• 4-flute spiral geometry supports efficient chip flow and improved surface finish
• 30-degree helix angle balances cutting efficiency with tool rigidity
• Centercutting design allows plunge entry directly into the workpiece
• Right-hand cut, right-hand flute configuration for standard spindle operation
• Weldon flat on shank reduces tool pullout risk in heavy cuts

Compatibility

Designed for use on high-temperature alloys, stainless steel, and steel workpieces. Compatible with standard 3/8 inch end mill holders and set-screw toolholders accepting a straight-cylindrical or Weldon flat shank.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the Weldon flat against the set screw in the toolholder to minimize the risk of axial pullout under load. Verify runout at the spindle and toolholder before beginning a cut. Always follow machine manufacturer guidelines and applicable shop safety procedures when changing or setting cutting tools.