Product Description
Dohre MEX Series graphite ball nose 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 ball nose end mill, this tool is mainly used for 3D contour finishing, curved surface machining, mold profile finishing, cavity finishing, arc surface machining, and smooth transition areas. The ball nose geometry helps achieve stable profile accuracy and smoother surface quality in graphite finishing applications.
With ultra-fine carbide, diamond coating, optimized flute geometry, and precision grinding control, the MEX graphite ball nose end mill helps improve tool life, surface consistency, and machining stability in graphite electrode and graphite mold production.
This product is suitable for semi-finishing and finishing applications. For flat surface machining, bottom surface machining, or graphite slotting, a graphite square end mill is usually more suitable. For side-wall machining or profile finishing where stronger corner protection is required, a graphite corner radius end mill can be considered.
Dohre can provide standard sizes, custom dimensions, OEM production, and application-specific graphite ball nose end mill solutions according to customer machining requirements.
Standard Specifications
| Parameter | Specification |
| Material | Ultra-fine Grain Carbide (MG1.0um) |
| Cobalt Content | 6% |
| Coating | Diamond Coating |
| Max Heat Resistance | Up to 1000℃ |
| Thermal Conductivity | Approx.2000 W/m·K |
| Helix Angle | 35° |
| Rake Angle | +6° |
| Radial Runout | ≤0.003mm |
| Dimensional Tolerance | ±0.005mm |
| Cooling Type | Dry Cutting /Air Blow |
Product Features
Diamond Coating for Graphite Finishing
The MEX graphite ball nose 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 finishing and mold cavity machining. Diamond coating helps protect the cutting edge, reduce abrasive wear, and maintain more stable tool performance during graphite semi-finishing and finishing operations.
Ultra-Fine Carbide Substrate
MEX graphite ball nose 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.
Ball Nose Geometry for 3D Contour Machining
The ball nose design is suitable for graphite applications that require curved surface machining, mold profile finishing, cavity finishing, and smooth transition machining.
Typical applications include:
• Graphite 3D contour finishing
• Mold cavity finishing
• Curved surface machining
• Arc transition machining
• Graphite electrode finishing
• Profile finishing
• Semi-finishing and finishing
Compared with a graphite square end mill, a ball nose end mill is more suitable for curved surfaces and 3D profiles. Compared with a graphite corner radius end mill, it is better suited for smooth contour finishing and freeform surface 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 ball nose 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 Ball Radius and Runout Control
Stable ball radius and runout control are important for graphite finishing, especially in 3D contour machining, electrode finishing, and mold cavity finishing.
MEX graphite ball nose end mills are produced with precision grinding control to support stable ball profile, consistent cutting edge geometry, and repeatable machining accuracy.
Applications for Graphite 3D Finishing
MEX graphite ball nose end mills are suitable for graphite machining applications that require strong wear resistance, stable profile accuracy, smooth dust evacuation, and consistent surface quality.
Suitable workpiece materials include:
Typical machining applications include:
• Graphite 3D contour finishing
• Graphite mold cavity finishing
• Graphite electrode finishing
• Curved surface machining
• Mold profile finishing
• Arc surface machining
• Smooth transition machining
• Semi-finishing
• Finishing
• Dry cutting with air blow
Recommended tool selection:
| Machining Need | Recommended Tool |
|---|
| 3D contour finishing | MEX Graphite Ball Nose End Mill |
| Curved surface machining | MEX Graphite Ball Nose End Mill |
| Mold cavity finishing | MEX Graphite Ball Nose End Mill |
| Graphite electrode finishing | MEX Graphite Ball Nose End Mill |
| Arc transition machining | MEX Graphite Ball Nose End Mill |
| Smooth profile finishing | MEX Graphite Ball Nose End Mill |
| Flat surface machining | MEX Graphite Square End Mill |
| Bottom surface machining | MEX Graphite Square End Mill |
| Graphite slotting | MEX Graphite Square End Mill |
| Side-wall finishing with stronger corner protection | MEX Graphite Corner Radius End Mill |
Manufacturing & Quality Control
Dohre manufactures graphite end mills for B2B customers who need stable tool quality, repeatable cutting performance, custom tool support, and reliable batch supply.
German Walter 5-Axis Grinding
MEX graphite ball nose end mills are produced using German Walter 5-axis high-precision grinding machines. This helps maintain stable flute geometry, accurate tool dimensions, ball profile consistency, and cutting edge quality.
Diamond Coating Control
Graphite machining places high demands on coating wear resistance and coating adhesion. Dohre uses diamond coating designed for abrasive non-metal material machining to help improve tool life and cutting stability.
Walter HELICHECK PLUS Inspection
Tool diameter, flute geometry, runout, ball radius, cutting edge profile, and key dimensions can be inspected with Walter HELICHECK PLUS measuring equipment. This helps support consistent tool geometry and stable batch quality.
High-Magnification Edge Inspection
High-magnification optical inspection is used to check cutting edge appearance, edge chipping, serration, coating condition, and visible defects before shipment.
Custom and OEM Graphite Ball Nose End Mills
For custom graphite ball nose end mill orders, Dohre can support diameter, flute length, overall length, shank size, flute number, ball radius, coating, cutting edge geometry, and application-specific tool design according to customer machining requirements.
From carbide material selection to precision grinding, diamond coating, edge inspection, and final quality control, Dohre focuses on stable tool performance for graphite electrode manufacturing, graphite mold machining, EDM electrode production, and precision CNC machining factories.
FAQ & Contact Us
Q1: What is a graphite ball nose end mill used for?
A graphite ball nose end mill is mainly used for 3D contour finishing, curved surface machining, graphite electrode finishing, mold cavity finishing, arc transition machining, semi-finishing, and finishing.
Q2: Why use a diamond coated end mill for graphite?
Graphite is highly abrasive and can cause fast tool wear. Diamond coating helps improve wear resistance, protect the cutting edge, and extend tool life during dry graphite machining.
Q3: Can this graphite ball nose end mill be used for finishing?
Yes. The MEX graphite ball nose end mill is suitable for graphite finishing and semi-finishing, especially for curved surfaces, 3D contours, mold profiles, and graphite electrode machining.
Q4: Can this tool be used for graphite slotting?
A ball nose end mill is not the first choice for graphite slotting. For slotting, flat bottom machining, and straight side-wall machining, a graphite square end mill is usually more suitable.
Q5: What is the difference between a graphite ball nose end mill and a graphite square end mill?
A graphite ball nose end mill is better for curved surfaces, 3D contours, cavities, and mold profile finishing. A graphite square end mill is better for flat surfaces, slots, bottom surfaces, and side walls.
Q6: What is the difference between a graphite ball nose end mill and a graphite corner radius end mill?
A graphite ball nose end mill is mainly used for smooth curved surfaces and 3D profiles. A graphite corner radius end mill is more suitable for side-wall finishing, shoulder machining, and profile machining where stronger corner protection is required.
Q7: Is coolant required when machining graphite?
Graphite is commonly machined under dry cutting or air blow conditions. Coolant is usually not required because it may form graphite slurry, which can affect machining stability and cleaning.
Q8: Can Dohre customize graphite ball nose end mills?
Yes. Dohre supports custom graphite ball nose end mills, including diameter, flute length, overall length, shank size, flute number, ball radius, coating, cutting edge geometry, and OEM production.
Q9: Are you a graphite end mill manufacturer?
Yes. Dohre manufactures carbide end mills for graphite, aluminum, carbon steel, stainless steel, mold steel, hardened steel, titanium alloy, and custom machining applications. Standard tools, OEM graphite end mills, and custom cutting tool solutions are available.
