Hertel E2033020 Square End Mill 5/16 in 2 Flute Cobalt

Product Description

The HERTEL E2033020 is a cobalt square end mill designed for milling ferrous and hard materials where high-speed steel tooling falls short. Built from M42 cobalt grade material, this single-end cutter runs uncoated with a 30-degree spiral flute geometry that promotes chip evacuation and reduces heat buildup. The 5/16-inch cutting diameter and 3/4-inch length of cut make it well-suited for slotting, profiling, and peripheral milling in tight workpiece features. Centercutting capability allows plunge entry without a pre-drilled hole. Licensed machinists and CNC setup technicians are the primary users of this tooling.

This end mill fits light-duty to medium-duty machining centers, knee mills, and CNC milling machines used in job shop, toolroom, and production environments. The 3/8-inch shank diameter suits standard collet chucks, end mill holders, and Weldon-style toolholders common in both manual and CNC spindles. The 1-3/4-inch reach length and 3-5/16-inch overall length accommodate moderate workpiece depths while maintaining rigidity. It is appropriate for cutting steel, stainless steel, cast iron, and similar materials where cobalt outperforms standard HSS.

Key Features

• M42 cobalt construction for increased hardness and heat resistance compared to standard HSS
• Centercutting design allows direct plunge milling without a pilot hole
• 30-degree helix angle promotes smooth chip flow and reduces cutting force
• Right-hand cut, right-hand flute configuration for standard spindle rotation
• Uncoated finish suitable for use with cutting fluids on ferrous materials
• Two-flute geometry maximizes chip clearance in slotting and full-width cuts

Compatibility

Designed as an OEM-style replacement or direct-use cobalt square end mill for standard 3/8-inch collet chucks and end mill holders on manual mills and CNC machining centers.

Installation Notes

A licensed machinist or toolroom technician should install this cutter using a properly rated collet, shrink-fit holder, or Weldon-style end mill holder torqued per the toolholder manufacturer specification. Ensure the spindle is fully stopped and locked out before changing tooling. Inspect the collet and holder bore for runout before tightening, as excessive runout accelerates flute wear and reduces surface finish quality. Apply cutting fluid or coolant appropriate to the workpiece material to maintain tool life.