Ball Nose End Mill for Steel Machining up to HRC55 | PEX Series

Technical data

Technical notes

• KERNVEX PEX Series ball nose end mill is a solid carbide milling tool designed for steel machining up to HRC55, including carbon steel, alloy steel, cast iron, ordinary mold steel, and general steel materials .
• As a ball nose end mill, this tool is mainly used for curved surface finishing, 3D contour machining, mold profile finishing, arc surface machining, and smooth transition areas. It is suitable when the workpiece requires stable profile accuracy, smoother tool marks, and consistent surface quality on curved or contoured surfaces.
• With ultra-fine carbide, AlTiN nano composite coating, a 6° positive rake angle, a 35° helix angle, and controlled ball radius accuracy, the PEX ball nose end mill helps improve cutting stability and surface consistency in general steel finishing and semi-finishing applications.
• For flat surface, slotting, and step machining, a PEX square end mill is usually more suitable. For shoulder milling and stronger corner protection, a PEX corner radius end mill is a better choice.
• Ultra-Fine Carbide for HRC55 Steel Machining The PEX ball nose end mill is made from ultra-fine carbide with 10% cobalt content. This carbide substrate provides a balanced combination of hardness, toughness, and wear resistance for carbon steel, alloy steel, cast iron, and general steel machining up to HRC55.
• For curved surface finishing and mold profile machining, stable carbide quality helps reduce edge wear and supports consistent dimensional accuracy during repeated cutting.
• AlTiN Nano Composite Coating The tool uses AlTiN nano composite coating to improve wear resistance and heat resistance during steel machining. This coating helps protect the cutting edge under higher cutting temperature and continuous finishing conditions.
• It is suitable for general steel machining, semi-dry machining, and finishing operations where cutting stability and tool life are important.
• Ball Nose Geometry for Curved Surface and 3D Profile Finishing The ball nose geometry is designed for curved surface machining, 3D contour finishing, mold profile finishing, arc surfaces, and smooth transition areas.
• This geometry is especially useful for:
• •3D contour finishing
• •Mold profile machining
• •Curved surface finishing
• •Arc surface machining
• •Smooth transition areas
• •Freeform profile finishing
• •General steel mold finishing
• Compared with a square end mill, a ball nose end mill is more suitable for curved and contoured surfaces. Compared with a corner radius end mill, it performs better when the cutting contact area changes continuously along a 3D profile.
• 6° Positive Rake Angle and 35° Helix Angle The 6° positive rake angle helps reduce cutting resistance and supports smoother cutting in steel machining. The 35° helix angle helps improve chip evacuation, reduce vibration, and maintain stable cutting performance.
• This design helps the tool perform well in finishing and semi-finishing applications where surface quality, tool stability, and profile accuracy are important.
• High Radius Accuracy for Stable Profile Consistency For ball nose end mills, radius accuracy directly affects curved surface quality, profile consistency, and dimensional control. KERNVEX controls ball radius accuracy to support stable 3D finishing performance in mold and general steel machining.
• This is especially important for mold profile finishing, curved transition areas, and parts that require consistent surface marks after CNC machining.
• KERNVEX PEX ball nose end mills are suitable for general CNC machining, steel mold finishing, curved surface machining, and semi-finishing applications up to HRC55.
• Suitable workpiece materials include:
• •Tool steel up to HRC55
• •Ordinary mold steel
• •General steel components
• Typical applications include mold profile finishing, curved surface machining, automotive component machining, general machinery parts, fixture machining, and CNC job shop production.