HS(200) 4 flute long neck corner radius end mill with 0.2μm ultra-fine carbide and AlTiCrSiN PVD coating for deep, high-finish machining of hardened and mold steels up to 65 HRC.
The HS(200) 4 flute long neck corner radius end mill is designed for high-hardness machining where deep feature access, corner strength and surface quality need to be considered together.
The long neck configuration provides additional reach for recessed and deep mold features, while the corner radius supports the cutting edge in profile, pocket and shoulder operations. A 0.2μm ultra-fine carbide substrate combined with AlTiCrSiN multi-element PVD coating makes the tool suitable for hardened steel and mold steel up to 65 HRC.
The HS(200) is intended for high-speed, dry and semi-dry machining, while coolant-assisted cutting can also be used where required.
Product Highlights
Deep Hard-Milling Applications
Deep Mold Cavities
The long neck provides the reach needed to access recessed mold areas while the corner radius supports the cutting edge through changes in tool engagement.
Deep Profiles and Pockets
The configuration is suited to deep profiles, pockets and shoulders where a standard-length corner-radius cutter cannot provide sufficient clearance.
Hardened Mold Features
The HS(200) is designed for hardened and mold steels up to 65 HRC, making it suitable for precision hard-milling applications after heat treatment.
High-Finish Hard Milling
The tool is also intended for applications where the machined surface requires a high level of finish quality.
What the Long Neck Adds
The long-neck section is primarily about access and clearance, not simply increasing overall tool length.
Deeper Access
The reduced neck provides additional reach into recessed machining areas.
Better Clearance
The tool body can remain outside the immediate cutting area when machining deep walls, pockets and cavities.
Effective Length Matters
The required effective length should be determined from the actual machining depth. Unnecessary extension can reduce rigidity and increase vibration.
Surface Quality Depends on Stability
For high-finish applications, controlling tool overhang and machine vibration is particularly important because deflection can directly affect the final surface.
Industrial long-neck corner-radius ranges likewise treat effective length, neck dimensions and corner-radius accuracy as key specifications for deep and high-accuracy machining.
Why Use a Corner Radius for Hard Milling?
Stronger Cutting Corner
The rounded transition provides more material behind the cutting edge than a sharp square corner, helping the tool handle localized cutting loads.
Reduced Corner Damage
A reinforced corner can reduce the tendency for chipping when the tool corner encounters higher engagement or changing cutting loads.
Suitable for Profile Work
The radius geometry is useful for profiles, shoulders and pocket transitions where both side and end cutting edges are involved.
Better Fit for Mold Features
Corner-radius tooling is particularly useful where the workpiece requires controlled transitions rather than a sharp internal corner.
Current hardened-steel long-neck corner-radius products are commonly positioned around chipping prevention, chatter suppression and high-finish mold machining.
65 HRC Hard-Milling Capability
The HS(200) is positioned specifically for high-hardness workpieces.
Hardened Steel up to 65 HRC
The stated application range reaches 65 HRC, placing the tool in the high-hardness milling category.
Mold and Die Machining
The long-neck geometry is suited to hardened mold features that require extended access without sacrificing the advantages of a reinforced corner.
High-Speed Cutting
The ultra-fine carbide substrate and AlTiCrSiN coating are intended to support high-speed cutting under demanding thermal conditions.
High Surface Finish
The HS(200) can be used for machining where surface quality is important. Final finish will also depend on machine rigidity, toolholding, runout, effective length and cutting parameters.
AlTiCrSiN for Demanding Thermal Conditions
The AlTiCrSiN multi-element PVD coating is designed for high-temperature and wear-demanding machining.
High-Temperature Performance
The supplied product information specifies performance at temperatures above approximately 1100°C for the coating system.
Wear Resistance
The hard PVD layer helps protect the ultra-fine carbide substrate during high-speed machining of hardened materials.
Dry and Semi-Dry Cutting
The coating system is particularly suited to dry and semi-dry machining, while coolant-assisted cutting remains available when required by the application.
The approximately 1100°C figure refers to the stated high-temperature performance of the coating system, not the actual cutting temperature at the tool edge.
Material Applications
| Workpiece Material | Application Focus |
| Hardened Steel ≤65 HRC | Deep hard milling and finishing |
| Mold Steel | Recessed cavities and deep mold features |
| Stainless Steel | Selected high-speed machining |
| Titanium Alloy | Difficult-material machining |
| Nickel-Based Superalloy | Selected high-temperature alloy applications |
Actual performance depends on material grade, hardness, cutting diameter, corner radius, effective length, tool overhang, machine rigidity and cutting conditions.
Technical Specifications
| Parameter | Specification |
| Series | HS(200) |
| Tool Type | 4 Flute Long Neck Carbide Corner Radius End Mill |
| Flute Count | 4 |
| End Configuration | Corner Radius |
| Tool Design | 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 |
Critical Dimensions
For this combination of geometry and reach, the following dimensions should be evaluated together:
How to Select the HS(200) Configuration
Start With Machining Depth
Determine the actual depth of the feature before selecting the effective length.
Select the Corner Radius
Match the radius to the required part geometry and the desired transition at the component corner.
Choose the Cutting Diameter
Use the largest practical diameter that fits the feature to maintain cutting rigidity.
Check Neck Clearance
Ensure the long neck provides enough clearance from surrounding walls and shoulders.
Minimize Tool Extension
For high-finish hard milling, avoid unnecessary overhang because deflection can directly affect dimensional accuracy and surface quality.
Cutting Conditions
Long-neck hard milling requires parameters matched to the complete tool configuration rather than diameter alone.
Recommended cutting data can include:
The starting point should be selected based on:
Tool Diameter + Corner Radius + Effective Length + Workpiece Hardness + Machining Depth
Customization
Customized configurations can be considered where standard diameter, corner-radius or reach combinations do not match the machining requirement.
Custom Options
Frequently Asked Questions
What is the HS(200) 4 flute long neck corner radius end mill used for?
It is designed for deep pockets, recessed cavities, profiles and other hardened-steel features where both extended reach and a reinforced cutting corner are required.
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 is the advantage of combining a long neck with a corner radius?
The long neck provides reach and clearance for deep features, while the corner radius provides additional support at the cutting corner during pocket, shoulder and profile milling.
Is the HS(200) suitable for high surface-finish machining?
Yes. The HS(200) is intended for applications where surface finish is important, although final results also depend on machine rigidity, runout, tool extension and cutting parameters.
Can the HS(200) be used for dry and semi-dry machining?
Yes. High-speed dry and semi-dry cutting are key applications, while coolant-assisted machining can also be used when required.
