Carbide Square End Mill for Hardened Steel
Designed for side milling, shoulder machining, flat surfaces and medium-to-fine machining of high-hardness steel components.
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HARDENED STEEL · HRC60–68 · WHOLESALE
Carbide End Mills for Hardened Steel
ZHY carbide end mills for hardened steel are designed for semi-finishing and finishing heat-treated mold, die and tool steels in the HRC60–68 hardness range.
The range combines a 0.4 μm ultra-fine carbide substrate, 9% cobalt content, DR3 bronze high-wear-resistant coating, a 68% reinforced core and cutting geometry matched to square, ball nose and corner radius applications.
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0.4 μm Ultra-Fine Carbide
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9% Cobalt Content
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DR3 Bronze Coating
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HRC60–68 Finishing
Hardened Steel End Mill Range
Select the cutter profile according to the part geometry, machining position and required finishing result.
Carbide Ball Nose End Mill for Hardened Steel
Designed for complex cavities, inclined surfaces, curved profiles, 3D contouring and high-hardness surface finishing.
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Carbide Corner Radius End Mill for Hardened Steel
Combines a flat-bottom profile with reinforced corner strength for cavity bottoms, transition radii, contours and semi-finishing.
Request SpecificationsSelect the Right Tool Geometry
Square, ball nose and corner radius cutters use different helix geometries and should be selected according to the actual machining feature.
45° Helix
Square End Mills
The 45° helix design supports stable side milling and medium-to-fine machining of hardened steel walls, shoulders and flat profiles.
35° Helix
Ball Nose End Mills
The 35° helix supports smoother cutting during cavity, inclined-surface, curved-surface and three-dimensional profile finishing.
35° Helix
Corner Radius End Mills
The reinforced corner and 35° helix support semi-finishing and finishing of bottom-edge radii, transition surfaces and complex contours.
Recommended Hardened Steel Applications
The range is mainly intended for controlled semi-finishing and finishing operations under rigid machining conditions.
01
Side Finishing
Hardened steel walls, shoulders and peripheral profiles.
02
Complex Cavities
Mold cavities, recessed areas and internal profiles.
03
Curved Surfaces
Inclined surfaces, free-form profiles and 3D contours.
04
Profile Finishing
Continuous finishing of complex mold outlines and transitions.
Technical Performance Highlights
Substrate, coating, reinforced geometry and controlled edge preparation work together to improve wear resistance and machining stability in HRC60–68 materials.
0.4 μm Ultra-Fine Carbide
The carbide substrate uses imported ultra-fine powder with a grain size of approximately 0.4 μm for high hardness, wear resistance and consistent cutting edges.
9% Cobalt Content
A 9% cobalt content balances substrate hardness, cutting-edge strength and fracture resistance during high-hardness steel machining.
DR3 Bronze Wear-Resistant Coating
The bronze-colored DR3 coating provides resistance to heat and abrasive wear at cutting temperatures up to approximately 1300°C, supporting stable performance during extended finishing operations.
68% Reinforced Core Design
The large 68% core diameter increases cutter rigidity and helps reduce deflection and vibration under high cutting pressure.
0° to −5° Peripheral Rake
The controlled negative peripheral rake strengthens the cutting edge and helps reduce premature chipping during hardened steel machining.
Geometry Matched to Tool Shape
Square end mills use a 45° helix, while ball nose and corner radius end mills use a 35° helix matched to curved, inclined and radius finishing operations.
Automated Edge Honing
Automated rubber-bonded diamond polishing helps maintain consistent edge preparation across each cutting edge, with the honing value controlled within ±3 μm.
Walter Five-Axis Grinding
Walter five-axis precision grinding supports cutting-edge sharpness, dimensional accuracy and repeatable tool geometry for smoother cutting.
Precision Radius Grinding
Ball nose and corner radius tools can achieve an R-profile grinding accuracy of approximately 0.003–0.005 mm for consistent cavity and contour finishing.
HRC60–68 Finishing Range
The range is developed for controlled semi-finishing and finishing of high-hardness mold, die and tool steels within the HRC60–68 range.
Recommended Workpiece Materials
Select the cutter according to the actual heat-treatment condition and measured workpiece hardness rather than the steel grade alone.
Heat-Treated H13 Steel
Hardened S136 Steel
Hardened Mold Steel
Quenched Die Steel
Hardened Tool Steel
Selected Powder Tool Steel
Core HRC60–68 Applications
- Heat-treated H13 mold and die steel
- Hardened S136 mold steel
- Quenched mold and tool steels
- Selected high-hardness powder steels
Additional Finishing Applications
- 718H mold steel finishing
- NAK80 mold steel finishing
- Complex mold cavity finishing
- Curved and contour surface machining
Available Product Options
Standard and customized configurations can be supplied according to hardness, part geometry and purchasing requirements.
| Tool Type | Square / Ball Nose / Corner Radius |
|---|---|
| Recommended Range | HRC60–68 Hardened Steel |
| Carbide Grain Size | Approximately 0.4 μm |
| Cobalt Content | 9% |
| Coating | DR3 Bronze High-Wear-Resistant Coating |
| Coating Temperature Resistance | Up to Approximately 1300°C |
| Core Diameter | 68% Reinforced Core Design |
| Peripheral Rake | 0° to −5° |
| Square End Mill Helix | 45° |
| Ball Nose / Corner Radius Helix | 35° |
| Edge Preparation | Automated Diamond Polishing, Controlled Within ±3 μm |
| Ball / Corner Radius Accuracy | Approximately 0.003–0.005 mm |
| Diameter and Length | Standard Sizes / Long Reach / Custom Dimensions |
| Marking | ZHY Logo / Customer Logo / Customer Model Number |
| Packaging | Standard Packaging / Private-Label Packaging |
Wholesale and OEM Support
ZHY supports standard product supply, mixed-size orders, customized hardened steel tools and private-label requirements.
Wholesale Order Support
- Standard and mixed-size orders
- Square, ball nose and corner radius cutters
- Samples for hardened steel machining tests
- Bulk quotations based on size and quantity
- Long-reach and custom dimensions
- Application review based on actual 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 Batch Quality Control
Precision grinding, controlled edge honing and profile inspection support consistent geometry and repeatable batch delivery.
Carbide Material Verification
Walter Five-Axis Grinding
Core Geometry Inspection
Helix Angle Inspection
Automated Edge Honing
R-Profile Measurement
Coating Appearance Inspection
Final Packaging Inspection
Request a Hardened Steel End Mill Quotation
Send us the cutter type, diameter, flute length, overall length, workpiece grade, actual HRC hardness, machining feature, quantity and packaging requirements. Our team will review the application and recommend a suitable configuration.
Request a Wholesale Quote