The HH(300) Micro Diameter 2 Flute Ball Nose End Mill combines 0.3 μm ultra-fine grain carbide with a TiSiN PVD coating for precision machining. Designed for hardened steel up to 60 HRC, mold steel, titanium alloys, and nickel-based superalloys in high-speed, dry, and semi-dry cutting.
The HH(300) Micro Diameter 2 Flute Ball Nose End Mill is designed for precision milling where small tool diameters and controlled cutting are required.
Its micro-diameter ball nose profile is suitable for fine 3D contours, small cavities, narrow features, and detailed mold components.
The tool uses a 0.3 μm ultra-fine grain carbide substrate combined with a high-performance TiSiN PVD coating.
This combination is designed for high-speed machining of hardened and difficult-to-machine materials, including hardened steel up to 60 HRC.
Micro Diameter for Fine Features
A micro ball nose end mill allows manufacturers to machine small geometries that are difficult to reach with larger cutting tools.
The HH(300) is suitable for small cavities, miniature features, fine grooves, and detailed 3D surfaces where dimensional control and tool stability are important.
Its compact cutting profile also makes it suitable for precision mold and die components.
High-Performance TiSiN Coating
The TiSiN composite PVD coating provides high coating hardness and strong resistance to elevated cutting temperatures.
Its high-temperature performance is approximately 1200°C, supporting demanding high-speed machining and dry or semi-dry cutting conditions.
The coating is particularly suited to applications where the cutting edge is exposed to high thermal loads.
Key Features & Benefits
0.3 μm Ultra-Fine Grain Carbide
The 0.3 μm carbide substrate provides a stable cutting edge for micro machining.
Its fine grain structure supports wear resistance and edge stability in demanding precision applications.
2-Flute Ball Nose Geometry
The 2-flute ball nose profile is designed for 3D contouring, curved-surface machining, profiling, and precision finishing.
It is well suited to detailed surfaces where a smaller cutting radius is required.
Machining Hardened Steel up to 60 HRC
The HH(300) is designed for hardened steel and mold steel applications with hardness up to 60 HRC.
The carbide substrate and TiSiN coating provide a combination of hardness, wear resistance, and thermal performance for hard-material machining.
High-Speed, Dry, and Semi-Dry Cutting
The HH(300) is optimized for high-speed machining as well as dry and semi-dry cutting.
This makes it suitable for applications where coolant use is limited or where a dry cutting process is preferred.
Suitable for Difficult-to-Machine Alloys
The HH(300) can also be used for titanium alloys and nickel-based superalloys.
These materials can generate high cutting temperatures and place additional demands on tool performance.
Machining Challenges the HH(300) Helps Solve
Machining Small Geometries
Large-diameter tools cannot always enter small cavities or reproduce fine surface details.
The micro-diameter design allows the HH(300) to machine smaller features with greater control.
Maintaining Stability in Micro Machining
Small tools are sensitive to wear and cutting conditions.
The ultra-fine grain carbide substrate is designed to provide a stable cutting edge during precision milling.
High Temperature in Dry Cutting
Dry machining can increase thermal stress at the cutting edge.
The TiSiN coating provides high-temperature performance to support demanding dry and semi-dry machining conditions.
Hard Mold Steel Machining
Machining hardened mold steel requires a tool capable of handling high cutting loads and elevated temperatures.
The HH(300) is designed for hardened steel up to 60 HRC, making it suitable for hard mold and die applications.
Recommended Materials
The HH(300) is suitable for:
Actual tool selection should consider workpiece hardness, tool diameter, machine rigidity, spindle capability, and cutting conditions.
Typical Applications
The HH(300) Micro Diameter Ball Nose End Mill is suitable for:
It is particularly suitable for applications where small feature size and surface detail are more important than high material-removal rates.
Technical Specifications
| Specification | Details |
| Product Series | HH(300) |
| Tool Type | Micro Diameter Ball Nose End Mill |
| Number of Flutes | 2 |
| Substrate | Ultra-Fine Grain Carbide |
| Carbide Grain Size | 0.3 μm |
| Coating | TiSiN Composite PVD Coating |
| High-Temperature Performance | Approx. 1200°C |
| Hardened Steel Hardness | Up to 60 HRC |
| Cutting Methods | High-Speed, Dry, Semi-Dry |
| Suitable Materials | Hardened Steel, Mold Steel, Titanium Alloys, Nickel-Based Superalloys |
Why Choose the HH(300) Micro Ball Nose End Mill?
The HH(300) is designed for precision applications where small tool diameter, edge stability, and hard-material capability are important.
Its micro-diameter ball nose geometry makes it suitable for detailed mold features and fine 3D surfaces, while the TiSiN coating supports demanding high-speed machining conditions.
Custom Micro Ball Nose End Mills
Micro machining often requires specific tool dimensions and cutting geometries to match the workpiece.
JimmyTool supports custom carbide ball nose end mills based on customer drawings, samples, and machining requirements.
Custom solutions can be developed according to required tool diameter, geometry, coating, carbide grade, and application conditions.
For a custom inquiry, provide the required tool diameter, workpiece material, material hardness, machining conditions, quantity, and drawing or sample where available.
FAQ
What is a micro ball nose end mill used for?
A micro ball nose end mill is used for small cavities, fine 3D contours, miniature features, and precision surfaces where a standard-size ball nose cutter is too large.
Can the HH(300) machine hardened steel up to 60 HRC?
Yes. The HH(300) is designed for hardened steel and mold steel applications up to 60 HRC.
Is the HH(300) suitable for dry machining?
Yes. The tool is designed for high-speed dry and semi-dry machining and can also be used with coolant when required.
Can JimmyTool customize the micro ball nose end mill?
Yes. JimmyTool can manufacture custom carbide ball nose end mills based on drawings, samples, or specific machining requirements.
Request a Quote for HH(300)
Looking for a micro ball nose end mill for precision mold machining, small cavities, or hardened steel up to 60 HRC?
Send us your tool diameter, workpiece material, hardness, machining conditions, and required quantity.
For non-standard requirements, a drawing or sample can also be provided for review. JimmyTool can recommend a suitable HH(300) specification or develop a custom micro ball nose end mill for your application.
