E9990TF High Speed Steel (HSS) Square Nose End Mill Weldon Shank TIALN Multilayer Finish Roughing Cut Non-Center Cutting 30 Deg Helix 4 Flutes 3.875 Overall Length 0.75 Cutting Diameter 0.7

Roughing end mills have chip-breaking cutting edges that remove material in less time than conventional end mills Fine-pitch tooth design and tool geometry are suitable for high-production machining on a range of strong materials including structural steel carbon steel alloy steel tool steel prehardened steel and cast iron Titanium aluminum nitride (TiAlN) coating lubricates the end mill for high-temperature stability and abrasion resistance at high cutting speeds offering better heat resistance than TiN and TiCN coatings Powdered-metal high-speed steel is tougher and more shock than conventional high-speed steel and cobalt steel Number of flutes varies by diameter for optimum feed and cut rate