Hertel E4039032 Square End Mill 1/2 in 4 Flute Cobalt

Product Description

The HERTEL E4039032 is a 4-flute cobalt square end mill designed for general-purpose milling operations in ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel, it carries a TiN (titanium nitride) finish that extends tool life in abrasive cutting conditions. The cutter measures 0.5 inches in diameter with a 1.25-inch length of cut and a 3.25-inch overall length. The 30-degree spiral helix promotes smooth chip evacuation and reduces cutting forces. This is a centercutting tool, meaning it can plunge directly into a workpiece, giving machinists more operational flexibility in a single setup.

This end mill is suited for milling slots, pockets, and profiles on manual mills and CNC machining centers. The regular-length geometry fits standard toolholding setups without extended reach concerns. Right-hand cut and right-hand flute orientation makes it compatible with conventional spindle configurations found in most shop environments. Typical applications include finishing and semi-finishing passes on steel, stainless, cast iron, and similar ferrous workpiece materials where cobalt tooling outperforms standard HSS.

Key Features

• M42 cobalt construction for increased heat and wear resistance over standard HSS
• TiN coating reduces friction and extends tool life in demanding cuts
• 4-flute spiral design with 30-degree helix for efficient chip evacuation
• Centercutting capability allows direct plunge entry into workpiece
• Right-hand cut, right-hand flute for standard spindle compatibility
• Regular-length geometry for rigid, chatter-resistant performance in typical toolholding

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 0.5-inch collet chucks, end mill holders, and shrink-fit holders accepting a 0.5-inch shank diameter on manual or CNC milling machines.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the 0.5-inch shank fully into the holder and torque set screws or collet nuts to the toolholder manufacturer's specification. Inspect the cutting edges and TiN coating for chips or damage before mounting; a damaged coating or chipped flute can accelerate tool failure and compromise surface finish.