HS(200) 2 flute micro carbide square end mill with 0.2μm ultra-fine carbide and AlTiCrSiN PVD coating for precision machining of hardened and mold steels up to 65 HRC, including high-speed dry cutting and high-finish applications.
The HS(200) 2 flute micro end mill is developed for precision machining of hardened and mold steels where a small cutting diameter, thermal resistance and surface quality are important.
Its 0.2μm ultra-fine carbide substrate is combined with a multi-element AlTiCrSiN PVD coating and dedicated cutting geometry for demanding high-speed machining conditions. The tool is designed for hardened steel up to 65 HRC and is particularly suited to dry and semi-dry cutting, while coolant-assisted machining is also available.
The HS(200) can also be applied to stainless steel, titanium alloys and nickel-based high-temperature alloys when suitable cutting conditions are used.
Product Highlights
Micro Milling Hardened Steel
The HS(200) is intended for applications where the workpiece is hard but the machining feature is small.
Small Features in Hardened Steel
The 2-flute micro configuration is suited to narrow pockets, fine steps, small walls and detailed features where a standard-diameter cutter cannot provide the required access.
Mold and Die Components
The tool is designed for hardened mold and die machining where both dimensional accuracy and surface quality matter.
Up to 65 HRC
The HS(200) supports hardened steel applications up to 65 HRC, placing it in the high-hardness micro milling category.
Micro end mills in this class are commonly specified for hardened materials alongside steel, stainless steel and high-temperature alloys; commercial examples also distinguish 2-flute square geometry specifically for micro applications.
Why 0.2μm Ultra-Fine Carbide Matters
The 0.2μm ultra-fine carbide substrate is one of the main technical characteristics of the HS(200).
Its fine grain structure is intended to support:
For small-diameter tools, edge wear and damage can have a proportionally larger effect on dimensional accuracy and surface finish, making substrate quality particularly important.
AlTiCrSiN Coating for High-Temperature Machining
The AlTiCrSiN multi-element PVD coating is designed for demanding thermal conditions.
Thermal Performance
The supplied product data specifies performance in machining conditions above approximately 1100°C for the coating system.
Wear Resistance
The hard coating helps protect the carbide cutting edge during high-speed machining of hardened materials.
Dry and Semi-Dry Cutting
Its thermal characteristics make the HS(200) particularly suited to dry and semi-dry machining, while coolant-assisted machining remains an available option.
The approximately 1100°C figure refers to the stated high-temperature performance of the coating system and should not be interpreted as the actual cutting temperature of the tool.
Surface Finish Applications
Surface quality is a significant part of the HS(200)’s positioning.
The combination of:
2-flute micro geometry + 0.2μm ultra-fine carbide + AlTiCrSiN coating + dedicated tool geometry
is intended for applications where the machined surface must meet a high finish requirement.
Typical uses include:
Actual surface finish depends on spindle runout, machine rigidity, toolholding accuracy, radial engagement, feed rate, tool diameter and workpiece condition.
Why Use 2 Flutes for Micro Machining?
More Open Flute Space
A 2-flute configuration leaves more space around the cutting zone, which can support chip evacuation in small-diameter machining.
Suitable for Small Diameters
Two-flute micro end mills are widely used for small-diameter square-end applications, including steel, hardened materials and high-temperature alloys.
Controlled Cutting Engagement
The geometry is suitable for precision machining where cutting load and chip evacuation need to be carefully controlled.
Material Applications
| Workpiece Material | Application Focus |
| Hardened Steel ≤65 HRC | Micro milling and precision finishing |
| Mold Steel | Small cavities, walls and finishing |
| Stainless Steel | Precision difficult-material machining |
| Titanium Alloy | High-speed difficult-material machining |
| Nickel-Based Superalloy | Selected high-temperature alloy applications |
Final performance depends on material grade, hardness, tool diameter, machine rigidity, tool overhang and cutting conditions.
Technical Specifications
| Parameter | Specification |
| Series | HS(200) |
| Tool Type | 2 Flute Micro Carbide Square End Mill |
| Flute Count | 2 |
| End Type | Square |
| Design | Micro Diameter |
| 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
For micro tools, tool diameter should be considered together with cutting length and machine setup.
Important dimensions include:
Selecting HS(200) for Micro Hard Milling
Start With Feature Size
Determine the narrowest feature to be machined and select a suitable cutting diameter.
Confirm Material Hardness
For hardened steel, verify that the workpiece is within the stated 65 HRC application range.
Choose the Shortest Practical Tool Setup
Micro tools are sensitive to vibration and runout. Minimize unnecessary tool extension to maintain stability.
Consider Surface Finish Requirements
For high-finish machining, machine rigidity, toolholding accuracy and radial engagement should be controlled carefully.
Match the Cutting Environment
High-speed dry or semi-dry machining can be used where appropriate, while coolant-assisted cutting remains an option.
Cutting Conditions
The HS(200) is designed for high-speed machining, but micro hard milling requires parameters matched to the exact tool diameter and workpiece hardness.
Recommended cutting data can include:
For an application-specific recommendation, provide:
Tool Diameter + Workpiece Material + Hardness + Machining Operation
Customization
Where standard configurations do not match a specific machining requirement, customized HS(200) tools can be considered.
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 with appropriate cutting conditions.
What makes the HS(200) suitable for micro hard milling?
The combination of 0.2μm ultra-fine carbide, 2-flute micro geometry and AlTiCrSiN PVD coating is designed for small-feature machining under demanding high-hardness conditions.
Is the HS(200) suitable for dry cutting?
Yes. High-speed dry and semi-dry machining are key applications, while coolant-assisted machining can also be used.
Can the HS(200) provide high surface finish?
It is designed for applications where surface finish is important, particularly in hardened and mold-steel machining. Final results depend on machine rigidity, runout, tool setup and cutting parameters.
Can the HS(200) machine titanium alloys and nickel-based superalloys?
Yes. The HS(200) can be used for selected titanium alloy and nickel-based high-temperature alloy applications under suitble machining conditions.
