Amana tool 51605 Solid Carbide Spiral CNC Variable Helix for Stainless Steel, Steel, Titanium, Cast Iron, and Cermet with AlTiN Coating 4-Flute x 1/4 Dia x 5/8 Cut Height x 1/4 Shank x 2-1/2 Inches Long Up-Cut CNC Corner Radius Bottom End Mil

4 Flute • Up-Cut Unique variable design for faster speeds and feeds provides quiet operation & better finish. Amana's CNC variable helix tools are the superstars of carbide end mills for professionals and hobbyists alike. The CNC variable helix eliminates harmonic chatter, critical when surface finishes, part dimension tolerances& tool life are of utmost importance. For use with manual and automatic milling machines, as well as the most sophisticated CNC machines. Excellent for cutting: Stainless SteelTitaniumCast IronSteelCermet (composites in which ceramic materials and metals are joined together)Premium Aluminum Titanium Nitride (AlTiN) coating provides quantum increases in productivity, either in terms of speed or longevity, with or without coolant. AlTiN Coating Benefits:Extra wear resistanceAllows for faster feed and speed ratesCutting edge protected from wearBetter chip evacuationLess heat build upSuperior cutting quality and extended tool life These CNC variable helix end mills are outstanding tools for peripheral milling, and can take aggressive cuts along the full length of the overall flute length with no issues. They last much longer than a general purpose end mills, partly because they are coated, partly because they dampen vibration which tends to break a sharp cutting edge down very quickly. WARNING! Inspect cut quality and adjust feed and speed accordingly. Care should be taken to observe proper feeds and speeds according to the workpiece material to avoid damage.Note: For optimal results and extended tool life use mist lubricant system or air cooling.