UEX 4 Flutes Corner Radius End Mill for Mold Steel up to HRC60

The UEX series corner radius end mill is specially designed for mold steel machining up to HRC60. It is especially suitable for mold cavities, side walls, corner transitions, and semi-finishing to finishing applications where edge strength, machining stability, and surface consistency are important.

Compared with square end mills, the corner radius geometry helps improve edge strength and reduce chipping during machining. Compared with ball nose end mills, it is more suitable for stable machining of side walls, shoulder areas, and transition surfaces where both precision and tool life are required.

With ultra-fine carbide substrate, advanced TIALSIN coating, and optimized anti-vibration geometry, this tool helps achieve smoother cutting, better corner protection, and more reliable tool life in mold steel machining.

The UEX corner radius end mill uses ultra-fine submicron carbide below 0.6 μm with 12% cobalt content. This material provides a balanced combination of hardness, toughness, and wear resistance, making it suitable for stable machining of mold steel materials.

The tool is coated with TIALSIN using a HIPIMS-enhanced process. This coating helps improve heat resistance, wear resistance, and coating adhesion, which is especially important in mold steel machining where cutting temperatures and cutting loads can be high.

The end teeth adopt an unequal division design of 88° / 92°, which helps reduce vibration and improve machining stability. This supports better surface quality and more reliable cutting performance during semi-finishing and finishing.

The tool also uses an unequal helix angle design of 35° / 37° to suppress chatter and improve chip evacuation. This is especially useful in cavity machining, side milling, and corner transition machining where vibration can affect both finish quality and tool life.

Its negative rake design, controlled within a 0° to -5° range, helps improve edge strength and crack resistance while maintaining stable cutting performance. This geometry is especially suitable for mold steel machining where both rigidity and precision are required.

The corner radius structure helps distribute cutting load more evenly and improve edge durability. This makes the tool a practical choice for semi-finishing and finishing operations where better corner protection and longer tool life are needed.

UEX 4 flutes corner radius end mill is specially developed for mold steel machining up to HRC60. It is suitable for a wide range of mold and die steels commonly used in tooling and mold manufacturing, including:

• •P20 pre-hardened mold steel

• •H13 mold steel

• •SKD61 mold steel

• •718H pre-hardened mold steel

• •CPM mold and die steel

• •Other pre-hardened or hardened mold steels within the recommended hardness range

This tool is especially suitable for the following machining applications:

• •Mold cavity semi-finishing

• •Mold cavity finishing

• •Side wall machining

• •Shoulder machining

• •Corner transition machining

• •Semi-finishing of mold components

• •Finishing of high-precision mold features

For mold steel machining, customers usually need stable cutting, better edge protection, reliable tool life, and consistent surface finish. UEX series corner radius end mills are developed to meet these requirements through optimized carbide substrate, advanced coating, and anti-vibration geometry.

If the machining task focuses on cavity features, side walls, transition surfaces, and areas where a stronger cutting edge is required, this corner radius end mill is a practical and reliable choice.

Dohre CNC pays close attention to edge preparation, dimensional consistency, and inspection standards in mold steel machining applications. UEX series end mills are produced under strict control to ensure stable cutting performance, consistent edge quality, and reliable batch accuracy.

We use a fluid sandblasting passivation process to greatly reduce burrs on the cutting edge and improve the surface finish of machined parts. This helps the tool achieve more stable cutting performance in mold steel semi-finishing and finishing applications.

The cutting edges are treated by a fully automatic passivation machine with rubber-bonded diamond abrasive polishing. This process helps ensure edge consistency across all tools, and the passivation value can be controlled within ±3 μm.

Profile measurement is carried out using German Walter HELICHECK PLUS equipment, together with 150× optical inspection and 300× high-definition appearance inspection. This helps ensure stable tool geometry, reliable cutting edge quality, and consistent batch production.

For corner radius tools, the radius accuracy can be controlled within 3 μm. This helps ensure smooth transition machining and consistent machining results in mold cavity applications.

UEX series end mills are produced on German Walter 5-axis high-precision grinding machines. This helps maintain cutting edge sharpness and dimensional accuracy, making cutting smoother and more stable in mold steel machining.

Q1：What materials is this UEX corner radius end mill suitable for?
It is specially developed for mold steel machining up to HRC60, including common mold and die steels such as P20, H13, SKD61, 718H, and CPM mold steel.

Q2: What is the main advantage of a corner radius end mill?
A corner radius end mill provides stronger edge protection than a square end mill. It helps reduce chipping, improve tool life, and maintain more stable cutting performance in mold steel machining.

Q3: Is this tool suitable for mold cavity machining?
Yes. It is especially suitable for mold cavity semi-finishing and finishing, side wall machining, and corner transition machining where stable cutting and good surface consistency are required.

Q4: Why choose a corner radius end mill instead of a square end mill?
A corner radius end mill offers better edge strength and load distribution, which helps reduce edge damage and improve stability in demanding mold steel applications.

Q5: Can Dohre CNC provide customized UEX corner radius end mills?
Yes. Dohre CNC can provide custom solutions based on tool diameter, corner radius size, cutting length, overall length, and other geometry requirements for different mold steel applications.

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