UF(600) 4 flute carbide corner radius end mill with 0.6μm carbide and AlCrN PVD coating, designed for stable pocket, shoulder and profile milling of stainless steel, titanium and hardened steel up to 50 HRC.
The UF(600) 4 flute corner radius end mill is designed for milling applications where a reinforced cutting corner is preferred over a sharp square edge.
Its rounded corner geometry helps distribute cutting stress around the tool corner, making it suitable for pocketing, shoulder milling, profiling and other operations where sharp-corner tools can be more vulnerable to edge damage. The tool combines a 0.6μm fine-grain carbide substrate with a high-performance AlCrN PVD coating for demanding machining conditions.
The UF(600) can be used for stainless steel, titanium alloys and hardened steel up to 50 HRC, with support for medium-speed, high-speed and dry or coolant-assisted machining.
Product Highlights
Why Choose a Corner Radius End Mill?
A corner radius end mill is not simply a square end mill with a different appearance. The rounded transition at the cutting corner changes how the cutting edge engages with the workpiece.
Reinforced Cutting Corner
A sharp 90° corner concentrates cutting stress at a small point. The corner radius provides a stronger transition at the cutting edge and can help reduce the risk of corner chipping.
Better Edge Strength
The rounded corner geometry provides additional material behind the cutting edge, which is particularly useful in side milling, pocketing and other operations where the tool corner experiences concentrated loads.
Suitable for Pocket and Shoulder Work
The geometry combines a flat-bottom cutting capability with a reinforced corner, making it suitable for pockets, shoulders, profiles and similar milling features.
More Stable for Difficult Materials
When machining stainless steel, titanium alloys or hardened steel, a reinforced corner can provide an advantage where a sharp corner is more susceptible to local edge damage.
Corner radius tooling is commonly positioned for improved edge strength and reduced corner chipping compared with sharp square-end geometry, particularly in pocket, shoulder and contour applications.
Application Focus
Pocket Milling
Suitable for machining flat-bottom pockets where corner strength is important during changes in tool engagement.
Shoulder Milling
The corner radius can provide additional edge support when machining shoulders and vertical walls.
Profile Milling
Suitable for external and internal profiles where the tool corner is repeatedly engaged with the workpiece.
Semi-Finishing
The rounded corner can provide a useful balance between cutting stability and surface quality in semi-finishing operations.
Stainless Steel Machining
The AlCrN coating helps reduce material adhesion and built-up edge when machining stainless steel.
Material Applications
| Workpiece Material | Application Focus |
| Stainless Steel | Pocket, shoulder and profile milling |
| Titanium Alloy | Difficult-material milling |
| Hardened Steel ≤50 HRC | Controlled milling and finishing |
| Other Difficult-to-Machine Materials | Application dependent |
Actual performance depends on material grade, hardness, tool diameter, corner radius, machine rigidity, tool overhang and cutting conditions.
AlCrN Coating for Heat and Adhesion Control
The UF(600) uses a high-performance AlCrN PVD coating to support machining conditions where cutting heat and material adhesion become important.
High-Temperature Oxidation Resistance
AlCrN is selected for demanding thermal conditions and high-temperature oxidation resistance.
Anti-Adhesion Performance
The coating helps limit material adhesion during stainless steel machining, where built-up edge can negatively affect cutting stability.
Dry and Coolant-Assisted Machining
The UF(600) can be used in dry cutting as well as coolant-assisted machining, depending on the workpiece and cutting conditions.
The use of AlCrN-coated carbide corner-radius tools for stainless steel is also common in current commercial tooling, with manufacturers emphasizing anti-chipping geometry, thermal performance and machining stability.
0.6μm Carbide Substrate
The 0.6μm fine-grain carbide provides the substrate foundation for the tool’s wear resistance and cutting-edge stability.
For a corner radius tool, substrate strength is particularly relevant because the rounded cutting corner is intended to handle higher localized cutting loads than a sharp edge.
The carbide substrate supports applications involving:
Technical Specifications
| Parameter | Specification |
| Series | UF(600) |
| Tool Type | 4 Flute Carbide Corner Radius End Mill |
| Flute Count | 4 |
| End Configuration | Corner Radius |
| Substrate | 0.6μm Fine-Grain Carbide |
| Coating | AlCrN PVD |
| Hardened Steel Capability | Up to 50 HRC |
| Cutting Modes | Medium-Speed / High-Speed / Dry / Coolant-Assisted |
| Recommended Materials | Stainless Steel, Titanium Alloy, Hardened Steel |
Corner Radius Selection
The corner radius should be selected according to the required component geometry and machining operation.
Important dimensions include:
Commercial corner-radius tools typically treat corner radius as a separate critical specification, alongside cutting diameter, flute length and shank dimensions.
Choosing the Right Corner Radius
Match the Radius to the Part Geometry
Select a radius that matches the required internal corner, profile or transition on the workpiece.
Consider Cutting Load
A larger corner radius generally provides more material behind the cutting edge, which can be beneficial when cutting forces are concentrated at the tool corner.
Balance Radius and Feature Access
The selected radius should provide sufficient edge strength without preventing the tool from reaching the required part geometry.
Match the Tool to the Operation
Pocketing, shoulder milling, profiling and semi-finishing may require different diameter-to-radius combinations.
Machining Considerations
Corner radius tools can be used across several milling strategies, but cutting conditions should be selected according to the actual engagement.
Recommended data can include:
For stainless steel, titanium and hardened steel, the recommended starting parameters depend on:
Tool Diameter + Corner Radius + Material + Hardness + Machining Strategy
Customization
When the standard diameter-to-radius combination does not match the required part geometry, customized configurations can be considered.
Custom Options
Frequently Asked Questions
What is a 4 flute corner radius end mill used for?
It is commonly used for pocketing, shoulder milling, profiling and other applications where a reinforced cutting corner is beneficial.
What is the advantage of a corner radius over a sharp square end?
The rounded corner provides a stronger cutting transition and can reduce the tendency for corner chipping compared with a sharp 90° edge.
Can the UF(600) corner radius end mill machine stainless steel?
Yes. Stainless steel is one of the main application materials, and the AlCrN coating helps control material adhesion during machining.
Can it machine hardened steel?
Yes. The UF(600) is suitable for hardened steel applications up to 50 HRC under appropriate cutting conditions.
How should I choose the corner radius?
The radius should be selected according to the required component geometry, internal corner size and machining operation. A larger radius can provide additional edge strength, but the radius must still fit the workpiece feature.
