Amana tool 51798 High Performance CNC Solid Carbide Variable Helix Spiral Bal Nose with AlTiN Coating for Steel, Stainless Steel & Composites 1/8 R x 1/4 Dia x 5/8 Cut Height x 1/4 Shank x 2-1/2 Inches Long Up-Cut 4-Flute End Mil/Router Bit

4-Flute • Up-Cut High Performance Solid Carbide CNC Variable Helix Spiral Ball Nose End Mills, unique variable design for faster speeds and feeds provides quiet operation & better finish. For use with manual and automatic milling machines, as well as the most sophisticated CNC machines. Excellent for cutting: Stainless SteelSteelCast IronCompositesLow Carbon SteelMagnesiumMetal Composite Material (MCM)Titanium (up to 40HRc Hardness)Cermet (composites in which ceramic materials and metals are joined together)Metal Composite Material (MCM)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 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.