4 Flute Unequal Tooth Pitch End Mill for Stainless Steel Machining

Processed Materials	Cast Iron, Carbon Steel, Alloy Steel ~30HRC		Stainless Steel		Pre-Hardened Steel, Quenched and Tempered Steel ~40HRC		Pre-Hardened Steel, Quenched and Tempered Steel ~50HRC		Hardened Steel ~55HRC
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)
3	15900	1220	8500	180	13270	950	10600	630	7430	360
4	11900	1260	6370	190	9950	970	8000	645	570	370
5	9500	1350	5060	190	7960	1010	6400	675	4460	390
6	7900	1330	4250	210	6630	1030	5300	690	3710	390
8	5900	1330	3180	210	4970	1020	4000	680	2785	405
10	4700	1310	2550	210	3980	1010	3200	675	2230	375
12	4000	1310	2120	210	3310	1010	2650	675	1855	375
14	3400	1220	1820	180	2840	945	2300	630	1590	360
16	3000	1220	1590	180	2480	945	2000	630	1390	360
18	2600	1200	1410	160	2210	930	1800	620	1240	350
20	2400	1200	1270	160	1990	930	1600	620	1115	350
Maximum Cutting Depth

1. The above table shows the standard values for side milling machining. When cutting grooves with the tool, the speed should be 60% to 80% of the above table, and the feed rate should be based on 50% to 70% as the standard.
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.
5. When the installation of machine tools and workpieces is poor, vibrations and abnormal sounds 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 as much as possible without interference.

The 4 Flute Unequal Tooth Pitch End Mill for Stainless Steel Machining series (NNB-4T) offers a wide range of specifications, with cutter diameters ranging from 4mm to 20mm, covering various combinations to meet different machining needs. Whether for small precision machining or large-scale cutting, the appropriate model can be found, with flexible configurations to adapt to various application scenarios.

Featuring an unequal tooth pitch design, it effectively reduces cutting vibrations and improves machining stability. The flat-bottom design ensures high-precision machining of the bottom surface while optimizing chip removal performance, allowing the tool to remain sharp and durable during efficient processing.

Made from 0.5μm high toughness, anti-chipping material, and combined with a 38°/41° spiral angle, the cutting process becomes smoother, reducing cutting resistance and extending tool life. The high-performance stainless steel-specific coating enhances wear resistance and oxidation resistance, maintaining efficient performance even during prolonged machining.

Optimized for stainless steel machining, it is suitable for materials like SUS304, 316, and 316L. Additionally, it shows excellent adaptability to pre-hardened steels (35-45HRC), quenched steels (45-55HRC), and titanium alloys (Ti-6Al-4V), ensuring high-quality cutting on a variety of high-strength materials.