Graphite Corner Radius End Mill for Finishing | MEX Series

Technical data

Technical notes

• KERNVEX MEX Series graphite corner radius end mill is designed for graphite electrode, graphite mold, graphite plate, EDM graphite material, and abrasive non-metal material machining .
• Graphite is highly abrasive and usually produces fine powder-like dust during dry machining. A suitable graphite end mill needs strong wear resistance, stable cutting edge quality, smooth dust evacuation, and reliable dimensional accuracy.
• As a corner radius end mill, this tool is mainly used for graphite finishing, semi-finishing, shoulder machining, side-wall finishing, profile finishing, and applications where better corner strength is required. The corner radius geometry helps reduce stress concentration at the cutting edge and lowers the risk of corner chipping compared with a sharp square end mill.
• With ultra-fine carbide, diamond coating, optimized flute geometry, and precision grinding control, the MEX graphite corner radius end mill helps improve tool life, edge durability, surface consistency, and machining stability in graphite electrode and graphite mold production.
• This product is not limited to a fixed 4-flute design. KERNVEX can provide different flute options according to graphite grade, tool diameter, cutting depth, dust evacuation requirement, and surface finish target.
• For flat surface machining, bottom surface machining, or graphite slotting, a graphite square end mill is usually more suitable. For 3D curved surfaces, cavity finishing, or freeform profile machining, a graphite ball nose end mill can be considered.
• KERNVEX can provide standard sizes, custom dimensions, OEM production, and application-specific graphite corner radius end mill solutions according to customer machining requirements.
• Diamond Coating for Graphite Machining
• The MEX graphite corner radius end mill uses diamond coating to improve wear resistance during dry graphite machining.
• Graphite is an abrasive material that can quickly wear ordinary carbide tools, especially during long-cycle electrode machining, graphite mold finishing, and profile machining. Diamond coating helps protect the cutting edge, reduce abrasive wear, and maintain more stable tool performance during graphite finishing and semi-finishing operations.
• Ultra-Fine Carbide Substrate
• MEX graphite corner radius end mills use ultra-fine grain carbide with MG 1.0 μm grain size and 6% cobalt content.
• This carbide substrate provides stable hardness, edge strength, and coating support for abrasive graphite cutting conditions. A stable carbide base helps improve cutting edge consistency, reduce premature wear, and support longer tool life in graphite electrode and graphite mold machining.
• Corner Radius Geometry for Edge Protection
• The corner radius design helps improve cutting edge strength by reducing stress concentration at the tool corner.
• This geometry is especially useful for graphite side-wall finishing, shoulder machining, profile finishing, and corner transition areas where sharp corners may chip more easily. Compared with a square end mill, a corner radius end mill provides better edge protection and longer tool stability. Compared with a ball nose end mill, it provides better side-wall and shoulder control.
• Typical applications include:
• • Graphite side-wall finishing
• • Graphite shoulder machining
• • Profile finishing
• • Corner transition machining
• • Semi-finishing and finishing
• • Graphite electrode machining
• • Graphite mold machining
• Optimized Flute Design for Graphite Dust Evacuation
• Graphite machining produces fine powder-like dust instead of normal metal chips. If graphite dust cannot be evacuated smoothly, it may affect tool wear, surface finish, and machining stability.
• The MEX graphite corner radius end mill uses optimized flute geometry to support smoother dust evacuation during dry cutting and air blow machining conditions.
• 35° Helix Angle and +6° Rake Angle
• The 35° helix angle supports smoother cutting and more stable dust evacuation during graphite machining. The +6° positive rake angle helps reduce cutting resistance and supports stable tool engagement during finishing and semi-finishing operations.
• This geometry helps the tool maintain smoother cutting performance in graphite electrode, graphite mold, and abrasive non-metal material machining.
• Precision Radius and Runout Control
• Stable corner radius, runout control, and dimensional accuracy are important for graphite finishing, especially in electrode machining, mold component machining, and profile finishing.
• MEX graphite corner radius end mills are produced with precision grinding control to support stable corner geometry, consistent cutting edge quality, and repeatable machining accuracy.
• MEX graphite corner radius end mills are suitable for graphite machining applications that require strong wear resistance, stable edge protection, smooth dust evacuation, and consistent surface quality.
• Suitable workpiece materials include:
• • Graphite electrode
• • Graphite mold
• • Graphite plate
• • EDM graphite material
• • Graphite composite material
• • Engineering plastics
• • Aluminum oxide
• • Zirconium oxide
• • Other abrasive non-metal materials
• Typical machining applications include:
• • Graphite finishing
• • Graphite semi-finishing
• • Side-wall finishing
• • Shoulder machining
• • Graphite mold finishing
• • Dry cutting with air blow
• Recommended tool selection:
• For graphite finishing, choosing the correct cutter shape helps improve edge durability, reduce tool wear, and maintain stable surface quality during long production cycles.