HS(200) 2 flute micro long neck carbide square end mill with 0.2μm ultra-fine carbide and AlTiCrSiN coating for deep, narrow features in hardened and mold steel up to 65 HRC.
The HS(200) 2 flute micro long neck end mill is designed for precision machining of small, deep and restricted features in hardened steel and mold steel.
Its micro-diameter cutting section provides access to fine features, while the long neck configuration creates additional clearance for deep grooves, recessed pockets and narrow cavities. The combination of 0.2μm ultra-fine carbide, AlTiCrSiN multi-element PVD coating and specialized tool geometry is designed for high-speed machining of hardened materials up to 65 HRC.
The HS(200) is particularly suited to dry and semi-dry machining and can also be used with coolant when required. Stainless steel, titanium alloys and nickel-based high-temperature alloys are also within its application range.
Product Highlights
Micro Long Neck Applications
Deep Micro Grooves
The small cutting diameter allows access to narrow grooves, while the long neck provides the additional reach needed for deeper features.
Recessed Mold Features
Suitable for small pockets, ribs and recessed mold details where standard micro end mills may not provide sufficient clearance.
Deep Precision Cavities
The long neck structure helps reach deeper cavity areas while reducing interference from the tool body.
Narrow Hardened-Steel Features
The combination of micro geometry and a 65 HRC application range makes the HS(200) suitable for precision machining of small features in hardened materials.
High-Finish Micro Machining
The tool can also be used in applications where surface quality is important, particularly for hardened mold components and precision features.
Micro long-neck tools are commonly used for deep grooves, narrow features and hard-to-reach areas, with effective length and neck dimensions being important selection factors. Current commercial products also combine 2-flute micro geometry with long-neck configurations for HRC65-class mold machining.
What the Micro Long Neck Design Provides
Small-Diameter Access
The micro cutting diameter allows the tool to enter features that cannot be reached with conventional end mills.
Additional Clearance
The reduced neck section provides clearance behind the cutting area when machining recessed or deep features.
Controlled Effective Length
The effective length should match the actual machining depth. Unnecessary extension increases the risk of deflection and vibration.
Restricted-Area Machining
The configuration is suitable for narrow pockets, fine ribs, deep grooves and other areas where access is limited.
For micro long-neck cutters, cutting diameter, flute length, neck diameter, effective length and overall length should be evaluated together when selecting the tool.
0.2μm Ultra-Fine Carbide for Precision Hard Milling
The 0.2μm ultra-fine carbide substrate is a key part of the HS(200) design.
Its fine grain structure is intended to provide:
This is particularly relevant for small-diameter cutters, where edge wear or damage can have a greater effect on dimensional accuracy and surface quality.
AlTiCrSiN for High-Temperature Cutting
The AlTiCrSiN multi-element PVD coating is designed for demanding thermal and wear conditions.
High-Temperature Performance
The supplied product information specifies performance in machining conditions above approximately 1100°C for the coating system.
Wear Resistance
The hard PVD coating helps protect the carbide substrate during high-speed machining of hardened materials.
Dry and Semi-Dry Machining
The coating system is particularly suited to dry and semi-dry cutting, while coolant-assisted machining remains an option for applications that require it.
Surface Quality
Stable coating and substrate performance can support consistent cutting conditions in applications where surface finish is important.
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.
Why 2 Flutes for Micro Long Neck Milling?
More Open Flute Space
A 2-flute configuration leaves more open space around the cutting zone, which can help manage chip evacuation in small-diameter applications.
Suitable for Micro Features
Two flutes are commonly used in micro end mill designs where cutting space is limited and controlled chip evacuation is important.
Controlled Cutting Engagement
The geometry is suited to precision machining where cutting load needs to be carefully managed to protect a small cutting edge.
Material Applications
| Workpiece Material | Application Focus |
| Hardened Steel ≤65 HRC | Deep micro features and precision hard milling |
| Mold Steel | Small cavities, ribs and recessed details |
| Stainless Steel | Precision machining of restricted features |
| Titanium Alloy | Difficult-material micro machining |
| Nickel-Based Superalloy | Selected high-temperature alloy applications |
Actual performance depends on material grade, hardness, tool diameter, effective length, machine rigidity, tool overhang and cutting conditions.
Technical Specifications
| Parameter | Specification |
| Series | HS(200) |
| Tool Type | 2 Flute Micro Long Neck Carbide Square End Mill |
| Flute Count | 2 |
| End Type | Square |
| Design | Micro Long Neck |
| 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 |
Key Dimensions
For micro long-neck applications, pay particular attention to:
Selecting the Right HS(200) Configuration
Match the Diameter to the Feature
Select a cutting diameter that fits the narrowest feature while maintaining adequate tool strength.
Determine the Required Reach
Measure the actual machining depth and choose an effective length that provides access without unnecessary extension.
Check Neck Clearance
Make sure the neck provides sufficient clearance from surrounding walls, ribs and shoulders.
Control Tool Overhang
Micro long-neck tools are sensitive to vibration and deflection. Use the shortest practical unsupported length.
Consider Surface Finish Requirements
For high-finish applications, spindle runout, toolholding accuracy, machine rigidity and radial engagement should be carefully controlled.
Cutting Conditions
The HS(200) is designed for high-speed machining, but micro long-neck applications require cutting parameters matched to the complete tool configuration.
Recommended data can include:
The appropriate starting point depends on:
Tool Diameter + Effective Length + Workpiece Hardness + Machining Depth + Machine Rigidity
Customization
Customized configurations can be considered where standard dimensions do not provide the required reach or machining clearance.
Custom Options
Frequently Asked Questions
What is the HS(200) 2 flute micro long neck end mill used for?
It is designed for small, deep and restricted machining features in hardened and mold steels, including micro grooves, recessed cavities and fine mold details.
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.
Why combine a micro diameter with a long neck?
The micro diameter provides access to narrow features, while the long neck provides additional clearance and reach for deeper areas.
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) be used for stainless steel, titanium and nickel-based alloys?
Yes. These materials are included in the stated application range, although the cutting conditions should be adjusted to the specific material and machining setup.
