CBN Corner Radius End Mill for HRC60+ Hardened Steel Finishing
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End mills are precision cutting tools used in CNC machining for milling, profiling, slotting, and contouring operations. Unlike drill bits, end mills can cut in multiple directions, allowing for complex geometries and high-precision surface machining. As a professional end mill manufacturer – Dohre CNC, we produce high-performance carbide end mills widely used in metalworking industries for both roughing and finishing processes.
End mills are used across a wide range of industries, from aerospace to mold making:
1、Slotting: Cutting grooves or slots into a workpiece.
2、Profiling: Cutting along the edges of a workpiece to create specific geometric shapes.
3、Face Milling: Flattening or smoothing the top surface of a part.
4、Plunging: Using center-cutting teeth to enter the material vertically.
5、3D Surface Contouring: Using Ball End Mills to machine complex, curved surfaces.
1、Flute Count: Fewer flutes provide larger chip-clearing space (ideal for aluminum); more flutes provide a smoother cut and better surface finish (ideal for steel).
2、Coatings: Coatings like TiN or TiAlN significantly increase wear resistance and heat tolerance, extending tool life.
3、Helix Angle: Affects cutting smoothness and chip evacuation. High helix angles allow for faster cutting but reduce edge strength.
4、Material: Carbide is the standard for extreme hardness and heat resistance; High-Speed Steel (HSS) is used for cost-sensitive applications.
Selecting the right end mill requires a balance between efficiency and quality:
Aluminum/Soft Metals: Choose 2 or 3 flutes with a high helix angle for chip evacuation.
Steel/Stainless Steel/Titanium: Choose 4+ flutes made of carbide with specialized coatings.
Roughing: Fast material removal; use fewer flutes or serrated profiles.
Finishing: High precision; use more flutes to minimize vibration.
Flat End Mill: General-purpose face and side milling.
Ball Nose: For 3D contours and mold making.
Bull Nose: Wear-resistant radius corner, ideal for floor radii.
Pro Tip: Always prioritize rigidity. Excessive tool overhang leads to chatter. Choose the shortest, thickest tool that meets your depth requirements.
| Workpiece Material | Recommended Series | Typical Applications |
|---|---|---|
| Carbon Steel | PEX Series | Slotting, side milling, finishing |
| Mold / Die Steel | UEX Series | Cavity machining, profile finishing |
| Hardened Steel | HEX Series | HRC60–68 applications |
| Stainless Steel | TEX Series | Slotting, side milling |
| Aluminum | AEX Series | High-speed machining |
| End Mill Type | Main Use |
|---|---|
| Square End Mills | Flat surface, slotting, side milling |
| Ball Nose End Mills | 3D contour, curved surface finishing |
| Corner Radius End Mills | Shoulder milling, side-wall finishing |
| Long Neck End Mills | Deep cavity, narrow area machining |
For special materials or non-standard conditions, Dohre provides custom tooling based on your specific machining requirements.
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