Description
Product Overview
This carbide ball nose end mill is designed for complex cavity
machining, inclined surfaces, curved profiles and three-dimensional
contour finishing of hardened mold, die and tool steels in the
HRC60–68 hardness range.
Also commonly referred to as a ball milling cutter, it combines
a 0.4 μm ultra-fine carbide substrate, 9% cobalt content,
DR3 bronze high-wear-resistant coating, a 68% reinforced core
and 35° helix geometry for stable high-hardness finishing.
Recommended Machining Applications
The full-radius ball nose profile and 35° helix support continuous
cutting contact during cavity, inclined-surface and complex contour
machining of hardened steel.
Complex Cavity Machining
Suitable for hardened mold cavities, recessed areas
and internal profiles with continuously changing
cutting engagement.
Inclined-Surface Finishing
Designed for sloped surfaces and transition features
where the effective cutting position changes along
the machining path.
Curved-Surface Milling
Supports free-form surfaces, rounded profiles and
complex mold geometries in high-hardness steel.
3D Contour Finishing
Suitable for controlled semi-finishing and finishing
of three-dimensional mold profiles and detailed
surface features.
Ball Nose End Mill for HRC65 Mold Steel
This product is suitable for high-hardness mold steel finishing,
including applications around HRC65. Tool selection should be
based on the actual measured workpiece hardness, machining stage,
tool overhang and machine rigidity.
Recommended Conditions
- Controlled semi-finishing and finishing
- Rigid machine and toolholding system
- Low spindle and holder runout
- Short and stable tool overhang
- Consistent finishing allowance
- Stable contour or cavity toolpath
Selection Notes
- HRC65 refers to workpiece hardness
- It does not indicate a 65° cutting angle
- Confirm hardness after heat treatment
- Use reduced engagement at higher hardness
- Long-neck tools require stricter stability control
- Send the application details before ordering
Ball Nose Geometry and Cutting Performance
The carbide substrate, coating, reinforced core, precision ball
profile and controlled edge preparation work together to support
stable finishing of hardened mold and tool steels.
0.4 μm Ultra-Fine Carbide
The carbide substrate uses imported ultra-fine powder
with an approximate grain size of 0.4 μm, supporting
high hardness, wear resistance and consistent
cutting-edge geometry.
9% Cobalt Content
A 9% cobalt content balances carbide hardness,
cutting-edge strength and fracture resistance during
high-hardness surface machining.
DR3 Bronze Wear-Resistant Coating
The Balzers DR3 bronze-colored coating helps resist
cutting heat and abrasive wear at operating temperatures
up to approximately 1300°C.
68% Reinforced Core
The large 68% core diameter improves cutter rigidity
and helps reduce tool deflection and vibration during
hardened steel contour finishing.
Full-Radius Ball Nose Profile
The full-radius cutting profile provides continuous
contact during cavity, curved-surface, inclined-surface
and three-dimensional contour machining.
35° Helix Geometry
The 35° helix supports smooth engagement and stable
cutting during cavity, inclined-surface and curved-profile
finishing operations.
0° to −5° Peripheral Rake
The controlled negative peripheral rake strengthens
the cutting edge and helps reduce premature chipping
when machining hardened steel.
Ball Radius Accuracy of 0.003–0.005 mm
Walter five-axis precision grinding controls the ball
profile accuracy to approximately 0.003–0.005 mm for
repeatable cavity and contour finishing.
Automated Edge Honing
Automated rubber-bonded diamond polishing helps maintain
consistent preparation across all cutting edges, with
the honing value controlled within ±3 μm.
Walter Five-Axis Grinding
Walter five-axis precision grinding supports cutting-edge
sharpness, ball-profile accuracy and repeatable tool
geometry for smoother hardened steel finishing.
Standard Ball Nose End Mill Sizes
Standard metric sizes, long-neck configurations and customized
dimensions are available for hardened steel and mold steel
finishing applications.
| Tool Diameter | Standard Metric Sizes / Custom Diameter |
|---|---|
| Ball Radius | R = 1/2 of Tool Diameter |
| Flute Length | Standard / Long Neck / Custom |
| Neck Length | Standard / Extended / Custom |
| Shank Diameter | Standard Shank / Custom Shank |
| Overall Length | Standard / Extended Length / Custom |
| Flute Options | 2 Flutes / Custom |
Send us the required diameter, flute length, neck length,
shank diameter, overall length, workpiece hardness and
order quantity to receive the current size list and quotation.
Available Configurations
Standard and customized carbide ball nose end mills can be
supplied according to the actual workpiece hardness, mold geometry,
tool overhang, finishing requirement and purchasing quantity.
| Tool Type | Carbide Ball Nose End Mill |
|---|---|
| Flute Options | 2 Flutes / Custom |
| Carbide Grain Size | Approximately 0.4 μm |
| Cobalt Content | 9% |
| Coating | Balzers DR3 Bronze High-Wear-Resistant Coating |
| Temperature Resistance | Up to Approximately 1300°C |
| Core Diameter | 68% Reinforced Core Design |
| Peripheral Rake | 0° to −5° |
| Helix Angle | 35° |
| Edge Preparation |
Automated Diamond Polishing, Controlled Within ±3 μm |
| Ball Radius Accuracy | Approximately 0.003–0.005 mm |
| Hardness Range | Recommended for HRC60–68 Hardened Steel |
| Diameter and Length |
Standard Sizes / Long Neck / Custom Dimensions |
| Marking |
ZHY Logo / Customer Logo / Customer Model Number |
| Packaging |
Standard Packaging / Private-Label Packaging |
Recommended Workpiece Materials
This carbide ball nose end mill is mainly recommended for
controlled semi-finishing and finishing of workpieces with
actual measured hardness in the HRC60–68 range.
Wholesale and OEM Support
ZHY supplies standard and customized carbide ball nose end mills
for distributors, importers, mold manufacturers, CNC workshops
and private-label cutting-tool brands.
Wholesale Order Support
- Standard and mixed-size orders
- 2-flute and customized configurations
- Samples for hardened steel machining tests
- Bulk quotations based on size and quantity
- Long-neck and customized dimensions
- Application review based on actual HRC hardness
OEM and Private Label
- Customer logo laser marking
- Customer product and model numbers
- Custom labels and barcode stickers
- Plastic box and outer carton options
- Private-label packaging support
- Packaging verification before shipment
Production and Ball Radius Inspection
Precision grinding, controlled edge honing and ball-profile
inspection support consistent geometry and repeatable
batch delivery.
Request a Hardened Steel Ball Nose End Mill Quotation
Send us the required diameter, flute length, neck length,
overall length, workpiece grade, actual HRC hardness,
machining feature, quantity and packaging requirements.
Our team will review the application and provide a suitable quotation.
