4-flute arc-end milling cutter for machining R-groove on materials with HRC 50°.

In the metalworking industry, a reliable end mill can often save workshops significant time and material costs. Particularly when machining high-hardness materials such as alloy steel, hardened steel, and cast iron, the tool’s stability, edge sharpness, and service life directly affect machining efficiency and product consistency.

To meet the processing ≤ HRC50 In response to material demands, Lizhou Cemented Carbide has launched... 50 degree 4 End mill with rounded cutting edge ( R knife). It is not only suitable for conventional side-edge machining but also can... R It excels in applications such as corner grooves, transition fillets, and cavity arcs, making it one of the commonly used tools in mold factories, machining shops, and parts mass-production facilities.

I. Specifically for ≤ HRC50 Material performance optimization for greater wear resistance and durability.

For machining alloy steel, hardened steel, and cast iron 600 When machining these materials, the cutting forces and heat generated on the tool are extremely high. If the material is unstable or its structure is不合理, it can easily lead to issues such as chipping, tool vibration, and a rough surface finish.

From the very beginning of material selection, this round-corner end mill has undergone strict quality control:

1 The cemented carbide substrate has high toughness, enhancing the tool's resistance to chipping.

2 It boasts superior heat resistance, making it ideal for high-speed machining and prolonged continuous cutting.

3 , suitable for HRC50 The following materials cover common categories such as die steel, structural steel, quenched and tempered steel, and cast iron.

Whether it's roughing, finishing, or precision machining with stringent dimensional accuracy requirements, it maintains excellent stability.

2. The four-blade cutter head design balances efficiency and surface quality.

Compared to two-blade and three-blade knives, a four-blade blade head has more cutting edges, which means:

Higher material removal rate per unit time

The tool has better rigidity and less vibration.

Surface roughness is more stable.

Suitable for efficient machining on harder materials.

In addition, with its double-edged belt structure, the tool exhibits enhanced guidance during cutting, reducing phenomena such as "chatter" and "edge rubbing," resulting in workpieces that are smoother and more precisely finished.

For requirements such as precision finishing of mold sidewalls, stepped surfaces, and flat surfaces, this... 4  Blade arc knives can all deliver consistent machining performance.

Three, 4 Blade with rounded arc tip ( R Knife design for smoother rounded-corner processing.

When machining rounded corners with conventional flat-end milling cutters, it is necessary to rely on repeated toolpaths or... CAM The calculation implements a transition, which increases the tool load and easily results in step marks.

The advantages of arc-shaped end mills are quite obvious:

The blade tip has a rounded arc structure, making it suitable for machining. R Corner groove, rounded cavity, transition chamfer

More conducive to heat dissipation, reducing the risk of chipping at the cutting edge.

Can improve surface consistency in cavity machining.

More suitable for 3D Face and mold fillet transition machining

For mold manufacturers, such tools can effectively improve machining quality and reduce the time required for finishing operations.

4. From materials to cutting tools, we maintain strict control over every process step to ensure stability and efficiency.

Lizhou Cemented Carbide implements stringent process standards in tool manufacturing:

1.  Selected stable cemented carbide powder and substrate

Improve the tool's wear resistance, flexural strength, and cutting-edge strength.

2.  Use a high-precision five-axis grinding machine to process the cutting edge.

Ensure that the angle of each cutting edge is consistent to make machining smoother.

3.  Tool Geometry Angle Optimization

Reduce cutting resistance and extend tool life.

4.  High coating stability and excellent heat resistance.

It maintains sharpness when machining hard steel and is less likely to “lose its edge.”

5.  Full inspection before leaving the factory

Includes total inspection of roundness, blade consistency, outer diameter dimensions, coaxiality, and more, ensuring that the product is ready for immediate use upon installation.

Strict manufacturing standards ensure stable tool performance during prolonged machining, reducing the frequency of tool changes and improving production throughput.

5. It is applicable to a wide range of machining scenarios and is truly a “universal tool for factories.”

This model 50  The arc-end milling cutter is suitable for: R Slot machining, fillet transition machining, cavity surface machining, eccentric machining, contour machining, general roughing to finishing, and detailed machining of hardened steel and alloy steel.

For factories that produce parts in large quantities, a tool that balances strength, wear resistance, and surface quality can undoubtedly significantly enhance machining efficiency.

6. We offer a full range of specifications and support custom-made solutions to meet the diverse needs of various machine tools and workpieces.

Lizhou Tools offers a complete range of standard models, compatible with various machine tool spindles, different clamping methods, and diverse requirements for cutting depth and tool length.

Also supports: Non-standard R Custom angles, long blades, custom long handles, special groove profiles / Custom blade angles, bulk orders OEM 、 ODM 

You only need to provide the drawings or processing requirements, and we’ll match you with the most suitable solution.

7. Why choose Lizhou arc-end milling cutters?

No blade chipping, stable tool life: Even when machining hardened steel, it maintains a consistent tool life.

Good surface finish: Reduces the need for secondary manual finishing.

Not picky about machine tools, with a wide range of applications: suitable for CNC milling machines, machining centers, engraving mills, and more.

Reduce processing time: high efficiency, strong stability

Reasonably priced and cost-effective: Long-term use saves even more costs.

For a workshop, a “good tool” is one that enables smoother machining, higher yield rates, and greater savings in both labor and time costs.

Lizhou Cemented Carbide 50  degree 4  The blade-radius end mill is precisely the kind of tool that can genuinely boost machining efficiency.