2 Flute Round Nose End Mills

Processed Materials	Cast Iron Nodular Cast Iron		Carbon Steel, Alloy Steel ~750N/mm²		Carbon Steel, Alloy Steel ~30HRC		Pre-Hardened Steel, Quenched and Tempered Steel ~40HRC		Stainless Steel		Pre-Hardened Steel, Quenched and Tempered Steel ~50HRC
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)	Rotational Speed (min-1)	Feed Speed (mm/min)	Rotational Speed (min-1)	Feed Speed (mm/min)	Rotational Speed (min-1)	Feed Speed (mm/min)
1	20000	200	20000	200	20000	160	20000	160	20000	60	20000	120
2	15000	320	15000	320	15000	290	15000	280	11150	84	13000	180
3	14000	545	14000	545	13000	510	10600	420	7500	120	8500	330
4	10800	560	10800	560	10000	520	8000	430	5500	130	6500	335
5	8200	580	8200	580	7600	540	6400	450	4500	130	5000	355
6	7000	600	7000	600	6400	550	5300	460	3700	140	4200	360
8	5200	600	5200	600	4800	550	4000	460	2800	140	3200	365
10	4200	580	4200	580	3800	540	3200	445	2200	140	2500	350
12	3500	580	3500	580	3200	540	2650	445	1850	140	2100	350
Maximum Cutting Depth
								Tool Diameter	Cutting Depth ap
								∅1<D<∅3	0.15D
								∅3<D	0.3D

1. The above table shows the standard values for side milling machining. When cutting grooves with the tool, the speed should be 50%~70% of the above table, and the feed rate should be 40%~60% as the standard value.
2. Please use high-precision machine tools and tool holders.
3. Please use air cooling or cutting fluid that is less likely to produce smoke.
4. It is recommended to use sequential milling for side milling.
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.
6. Minimize the tool overhang length as much as possible without interference.

NNC-2R 2-flute round nose end mills offer a variety of diameter and radius combinations to meet different machining requirements. For example, sub-models such as NNC-2R-D1-R0.2 and NNC-2R-D1.5-R0.5 are ideal for precise cutting in tight spaces or on smaller workpieces, while larger sizes such as NNC-2R-D4-R2 and NNC-2R-D6-R3 are ideal for high-volume or deep cavity applications. The wide range of specifications allows users to balance tool length, cutting diameter and tool nose radius to achieve the best results for different workpiece conditions.

The series adopts round nose geometry to effectively reduce stress concentration at the tool tip and optimize cutting paths, thereby improving machining efficiency. The double-edge design enhances chip evacuation in side milling while maintaining excellent surface finish and stability when machining on curves and complex contours. The curved cutting edge helps minimize chatter and ensures excellent surface quality even under high feed and high speed conditions.

NNC-2R 2-flute round nose end mills feature a tough, non-chipping (0.6μm) fine grain matrix that is precision CNC ground to provide consistent quality and high wear resistance. Advanced coating technology reduces friction coefficients and reduces heat build-up, extending tool life.

These end mills are suitable for semi-finishing and finishing operations on common materials such as steel, stainless steel, aluminum alloys, and copper alloys, while also being able to handle harder materials such as hardened steel and die steel.