High Performance 4 Flute Round Nose End Mills

Processed Materials	Pre-Hardened Steel 40~50HRC		Hardened Steel 50~60HRC		Hardened Steel 60~68HRC
Cutting Speed	300m/min		150m/min		100m/min
Diameter (mm)	Rotational Speed (min-1)	Feed Speed (mm/min)	Rotational Speed (min-1)	Feed Speed (mm/min)	Rotational Speed (min-1)	Feed Speed (mm/min)
3	32000	1225	16000	610	11000	420
4	24000	1500	12000	745	8000	500
5	19000	1630	9500	815	6400	550
6	16000	1850	8000	925	5300	610
8	12000	1850	6000	925	4000	610
10	9600	1850	4800	925	3200	610
12	8000	1920	4000	960	2700	648
16	6000	1440	3000	720	2000	480
Maximum Cutting Depth

1. Please use high-precision and high rigidity equipment and fixtures.
2. When the rigidity of the machine tool and workpiece installation is poor, vibration and abnormal sound may occur. In this case, the speed and feed rate in the table above should be reduced year-on-year.
3. Please use air cooling or MQL (minimum amount of oil mist cooling).
4. It is recommended to use sequential milling for side milling.
5. Minimize the tool suspension length as much as possible without interference.

NNH-4R high performance 4 flute round nose end mills provides a variety of specifications and sizes, which can be flexibly combined according to different processing requirements to form corresponding sub-models to meet various application scenarios. Whether it is small precision parts processing or efficient cutting of large-size workpieces, you can freely choose the appropriate tool size, taking into account efficiency and stability.

Its special round nose structure combined with the four-edge design can effectively disperse the cutting load and reduce vibration and tool wear. This shape can ensure a more stable cutting environment during high-speed milling, which is particularly suitable for the processing requirements of high-hardness materials. The round nose cutter head can also ensure surface finish and dimensional accuracy in semi-finishing and finishing.

Through advanced coating technology and precision grinding process, the tool has obtained high hardness and excellent wear resistance. The combination of high-performance AlTiSiN coating and (0.4μm) ultra-fine particle substrate enables it to maintain a long service life in high temperature and high-speed cutting environment, and maintain stable performance and precision during processing. Strict quality control and high-precision manufacturing process ensure the reliable performance of the tool under harsh conditions.

NNH-4R high performance 4 flute round nose end mills is suitable for processing a variety of materials, including high-hardness steel, alloy steel, mold steel and stainless steel. In high-speed milling applications, its high hardness and heat resistance help maintain the sharpness and stability of the blade, improve production efficiency and extend the service life of the tool.