HS(200) 4 flute carbide square end mill with 0.2μm ultra-fine carbide and AlTiCrSiN coating for hardened and mold steels up to 65 HRC, high-speed dry machining and high surface finish applications.
The HS(200) 4 flute end mill is designed for high-hardness machining where cutting temperature, tool wear and surface quality are critical.
Its 0.2μm ultra-fine carbide substrate is combined with a multi-element AlTiCrSiN PVD coating and specialized cutting geometry for machining hardened steel and mold steel up to 65 HRC. The tool is particularly suited to high-speed dry and semi-dry cutting, while coolant-assisted machining is also supported.
The HS(200) can also be used for difficult materials such as stainless steel, titanium alloys and nickel-based high-temperature alloys, with applications requiring a high-quality machined surface.
Product Highlights
Hardened Steel up to 65 HRC
The defining application of the HS(200) is high-hardness machining.
Compared with lower-hardness steel applications, cutting hardened materials generates greater mechanical and thermal loads on the cutting edge. The HS(200) combines an ultra-fine carbide substrate with a high-temperature PVD coating to address these conditions.
Mold Steel
The HS(200) is suited to hardened mold and die steels where dimensional accuracy and surface finish are important.
High-Hardness Components
The tool is designed for hardened steel applications up to 65 HRC, making it suitable for demanding hard milling operations.
Finishing and Surface Quality
The tool is also intended for machining applications where the final surface condition is important, particularly in precision mold and hardened-component machining.
AlTiCrSiN Coating for High-Temperature Cutting
The AlTiCrSiN multi-element PVD coating is one of the main technical features of the HS(200).
High-Temperature Performance
The coating is designed for demanding thermal conditions and is intended to perform under machining conditions involving temperatures above approximately 1100°C, according to the supplied product data.
Wear Protection
The hard PVD coating helps protect the carbide cutting edge against wear during high-speed machining of hardened materials.
Dry Machining
Its thermal performance makes the HS(200) particularly suitable for dry and semi-dry cutting, while coolant-assisted machining can also be used when required by the application.
The approximately 1100°C figure refers to the stated high-temperature performance of the coating system and should not be interpreted as the actual temperature of the cutting edge during normal machining.
Why 0.2μm Ultra-Fine Carbide Matters
The 0.2μm ultra-fine grain carbide provides a fine substrate structure suited to high-hardness and high-speed machining.
Key benefits include:
The fine carbide structure is particularly relevant when machining hardened steels where edge wear and chipping can quickly affect dimensional accuracy and surface quality.
High-Speed Dry Milling
The HS(200) is positioned for applications where high-speed machining and reduced coolant use are important.
Dry Cutting
The tool is designed for dry machining of hardened and mold steels under appropriate cutting conditions.
Semi-Dry Cutting
Where some lubrication or cooling is required, semi-dry machining can be used according to the workpiece and machine setup.
Coolant-Assisted Machining
The HS(200) can also be used with coolant when required by the machining process.
The appropriate cutting method depends on material hardness, tool diameter, engagement, machine rigidity and cutting parameters.
Surface Finish Applications
Surface quality is a specific strength of the HS(200)’s application positioning.
The combination of:
0.2μm ultra-fine carbide + AlTiCrSiN coating + dedicated tool geometry + 4-flute construction
is intended to support stable cutting and high-quality machined surfaces in hardened materials.
Typical applications include:
Final surface quality depends on tool runout, machine rigidity, workpiece condition, tool diameter, step-over, cutting parameters and toolholding accuracy.
Material Applications
| Workpiece Material | Application Focus |
| Hardened Steel ≤65 HRC | High-speed hard milling and finishing |
| Mold Steel | Mold and die machining |
| Stainless Steel | High-speed machining of difficult materials |
| Titanium Alloy | Difficult-material machining |
| Nickel-Based Superalloy | High-temperature alloy applications |
Actual performance depends on material grade, hardness, machine rigidity, tool geometry, tool overhang and cutting conditions.
Technical Specifications
| Parameter | Specification |
| Series | HS(200) |
| Tool Type | 4 Flute Carbide Square End Mill |
| Flute Count | 4 |
| End Type | Square |
| Carbide Substrate | 0.2μm Ultra-Fine Grain Carbide |
| Coating | AlTiCrSiN Multi-Element PVD |
| Hardened Steel Capability | Up to 65 HRC |
| High-Temperature Performance | Approximately 1100°C+ according to supplied data |
| Cutting Modes | High-Speed / Dry / Semi-Dry / Coolant-Assisted |
| Recommended Materials | Hardened Steel, Mold Steel, Stainless Steel, Titanium Alloy, Nickel-Based Superalloy |
Size Information
Select the tool according to the machining feature, hardness, cutting depth and required surface quality.
Important dimensions include:
Selecting HS(200) for Hard Milling
Confirm Workpiece Hardness
The HS(200) is intended for hardened steel applications up to 65 HRC. Confirm the actual workpiece hardness before selecting cutting conditions.
Choose the Right Tool Diameter
Select the largest practical diameter compatible with the feature to maintain cutting stability and rigidity.
Consider the Finishing Requirement
For applications where surface quality is important, tool runout, step-over, toolholding and machine rigidity should be controlled carefully.
Match Cutting Method to the Application
High-speed dry or semi-dry machining can be used when the machine and workpiece conditions are suitable. Coolant-assisted machining remains an option.
Control Tool Overhang
Long overhang increases vibration and deflection, which can directly affect surface finish and dimensional accuracy.
Cutting Conditions
The HS(200) is designed for high-speed machining, but cutting parameters should be selected according to the exact workpiece and tool size.
Recommended data can include:
For hard milling applications, cutting data should be matched to:
Tool Diameter + Workpiece Hardness + Machining Operation + Machine Rigidity
Customization
Customized HS(200) tools can be considered where standard dimensions do not match the machining requirement.
Custom Options
Frequently Asked Questions
Can the HS(200) machine hardened steel up to 65 HRC?
Yes. The HS(200) is designed for hardened steel applications up to 65 HRC under appropriate cutting conditions.
What makes the HS(200) suitable for high-temperature hard milling?
The combination of 0.2μm ultra-fine carbide and AlTiCrSiN PVD coating is designed for demanding thermal and wear conditions encountered during high-speed hard milling.
Is the HS(200) suitable for dry cutting?
Yes. High-speed dry and semi-dry machining are key applications for the HS(200), while coolant-assisted machining can also be used.
Can the HS(200) achieve good surface finish on hardened steel?
Yes. The tool is intended for applications where surface finish and machining quality are important, although final results also depend on machine rigidity, runout, step-over and cutting parameters.
Can the HS(200) machine titanium and nickel-based superalloys?
Yes. The HS(200) can also be used for selected titanium alloy and nickel-based high-temperature alloy applications under suitable machining conditions.
