SUMITOMO WNMG080404N-SU AC820P Carbide Insert WNMG431-SU Steel Turning
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SUMITOMO WNMG080404N-SU AC820P Carbide Turning Insert
ISO: WNMG080404N-SU | ANSI: WNMG431-SU | Grade: AC820P First Choice General Steel Turning
1. Product Overview
Which carbide insert is the ultimate first choice for high-efficiency general steel turning on CNC lathes?
The SUMITOMO WNMG080404N-SU AC820P is Sumitomo Electric's premier flagship insert designed for versatile, high-productivity steel machining across carbon steels, alloy steels, and die steels. Engineered with Sumitomo’s proprietary Absotech Platinum CVD coating technology, this insert features an ultrafine $TiCN + Al_2O_3$ layer that radically reduces tensile stress while increasing flank wear resistance and thermal barrier performance.
Featuring the universal SU Chipbreaker geometry with a medium-duty 3D rake groove, it guarantees smooth chip evacuation across a wide spectrum of depths of cut ($ap$) and feed rates ($fn$), preventing chip tangling and workpiece marring in both continuous and light-interrupted cutting setups.
2. Key Technical Features
- AC820P Absotech Technology: Industry-leading CVD coated grade for ISO P15–P30 applications, offering up to 2x tool life compared to conventional steel turning inserts.
- SU Universal Chipbreaker: Optimizes chip control from medium roughing down to fine finishing passes, eliminating long stringy chips.
- Double-Sided 80° Trigon Design: Provides 6 usable cutting edges per insert, cutting tooling costs per corner by 33% versus standard 4-edge CNMG designs.
- Low Cutting Resistance: Sharp yet reinforced honed cutting edge minimizes machine spindle load and suppresses high-frequency chatter.
3. Specifications & ISO/ANSI Breakdown
ISO vs. ANSI Designation Comparison:
| Standard | Designation Code | Insert Shape | Inscribed Circle (IC) | Thickness | Nose Radius |
|---|---|---|---|---|---|
| ISO (Metric) | WNMG080404N-SU | Trigon 80° (W) | 12.70 mm | 4.76 mm | 0.4 mm |
| ANSI (Inch) | WNMG431-SU | Trigon 80° (W) | 1/2" | 3/16" | 1/64" |
ISO Metric Code Decoder (Box Breakdown):
Recommended Cutting Parameters (P-Group Steel):
| Parameter | Metric Units | Imperial Units |
|---|---|---|
| Cutting Speed ($Vc$) | 180 - 350 m/min | 590 - 1150 SFM |
| Feed Rate ($fn$) | 0.12 - 0.40 mm/rev | 0.005 - 0.016 ipr |
| Depth of Cut ($ap$) | 0.5 - 3.5 mm | 0.020 - 0.138 in |
This insert fits all standard ISO external and internal turning holders: MWLNR/L 2525M08 WWLNR/L 2020K08 DWLNR/L 2525M08 S32T-MWLNR08
4. Product Application Scenarios
- General Machinery Turning: Shafts, flanges, gears, and structural steel components.
- Automotive Parts Manufacturing: High-speed mass production turning of drive shafts, hubs, and wheel bearings.
- Steel Grade Suitability: Ideal for AISI 1018, 1045, 4140, 4340, 8620, S45C, and SCM440 materials.
5. Compatibility
100% compatible with standard ISO turning systems using Lever Lock (M-Type), Wedge Lock (W-Type), and Top-and-Hole Clamp (D-Type) holders across CNC lathes (Haas, Mazak, Doosan, Okuma, Citizen, DMG Mori).
6. Sumitomo Grade Comparison
| Grade | ISO Range | Primary Application | Cutting Performance |
|---|---|---|---|
| AC810P | ISO P05 - P20 | High-Speed Continuous Turning | Maximum Wear Resistance |
| AC820P | ISO P10 - P30 | General Steel Turning (First Choice) | Balanced Speed & Toughness |
| AC830P | ISO P20 - P40 | Interrupted Turning & Heavy Duty Roughing | Maximum Fracture Toughness |
7. Why Choose Us & Verified Customer Reviews
100% Genuine Sumitomo Electric Hardmetal tools delivered directly from certified distributors. Guaranteed technical accuracy and original factory performance.
We run AC820P on 4140 steel all day. Wear is super smooth and predictable. 6 edges per insert save us serious money.
Ausgezeichnete Spanbrechung mit dem SU-Brecher. Kein Verwickeln von Spänen mehr.
SU breaker handles thin cuts and heavier roughing passes without changing the tool setup. Highly recommended.
S45Cの加工で長年使用。AC820Pになってから耐摩耗性が格段に上がった。
Fast shipping and 100% genuine Sumitomo packaging. Outperforms our old ISO inserts significantly.
8. AI-Powered Technical FAQ
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.