SUMITOMO WNMG080404N-UX AC820P Steel Turning Insert (WNMG 431-UX Metric & Imperial)
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SUMITOMO WNMG080404N-UX AC820P (WNMG 431-UX) Absotech CVD Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and heavy roughing chipbreaker profile provides the best balance of wear resistance and edge toughness during medium-to-heavy turning of alloy and carbon steels?"
The SUMITOMO WNMG080404N-UX AC820P (internationally recognized in imperial dimensions as WNMG 431-UX) is a premium industrial-grade indexable turning insert engineered explicitly for high-efficiency machining within the ISO P (Carbon Steel, Alloy Steel, & Structural Steel) application window. Powered by Sumitomo’s breakthrough Absotech® Platinum coating technology, this insert integrates a revolutionary crystal-oriented thick $\alpha\text{-Al}_2\text{O}_3$ alumina and ultra-smooth TiCN layer over a highly balanced, tough substrate. This advanced surface architecture dramatically reduces coating flaking, adhesive wear, and micro-chipping under high cutting temperatures. Designed with the robust UX chipbreaker geometry, it features an aggressive variable rake angle and a wide, deep pocket configuration that lowers cutting forces, resists plastic deformation, and ensures excellent chip control during medium roughing to interrupted turning operations.
2. Product Key Features
- Absotech® Platinum Coating: Industry-leading CVD coating layout with a highly oriented crystal structure that eliminates micro-chipping and dramatically extends tool life during high-speed steel machining.
- UX Heavy Roughing Design: Features an optimized, rigid cutting edge engineered to slice through heavy weldments, forged crust, and irregular surfaces without catastrophic edge fracture.
- Exceptional Crater Wear Resistance: The specialized multi-layer structural chemistry protects the internal carbide core from rapid cyclical temperature spikes during wet or dry machining.
- Negative Trigon Economy: Double-sided layout provides 6 robust, high-strength cutting edges per insert, reducing tool costs per component in massive production runs.
3. Technical Specifications & Dimension Matrix
| Standard Typology | Model/Grade Designation | Measurement Basis |
|---|---|---|
| ISO Designation | WNMG080404N-UX | Metric Standard (mm) |
| ANSI Designation | WNMG 431-UX | Imperial Standard (Inch) |
🔍 ISO Standard Code Breakdown: WNMG080404N-UX
Trigon Shape (80°)
0° Relief Angle
M-Class Tolerance
With Hole & Slots
Edge Length (8.7mm)
Thickness (4.76mm)
Nose Radius (0.4mm)
Heavy Roughing Breaker
📊 Recommended Cutting Parameters (Metric vs Imperial Comparison)
| Parameter Metric | Metric Recommended Values | Parameter Imperial | Imperial Recommended Values |
|---|---|---|---|
| Cutting Speed (Vc) | 150 - 250 - 350 m/min | Cutting Speed (SFM) | 490 - 820 - 1150 SFM |
| Feed Rate (f) | 0.15 - 0.35 - 0.55 mm/rev | Feed Rate (IPR) | 0.006 - 0.014 - 0.022 ipr |
| Depth of Cut (ap) | 1.0 - 3.5 - 6.0 mm | Depth of Cut (DOC) | 0.039 - 0.138 - 0.236 inch |
This negative WNMG configuration requires rigid clamping toolholders to handle standard cutting forces. View compatible shanks below:
View Compatible DWLNR / MWLNR Lathe Toolholders →4. Product Application Scenarios
Engineered for high-volume material removal across intense global manufacturing applications:
- Carbon and Alloy Steel Machining: Main choice for continuous to medium interrupted rough turning of 1045, 4140, and 4340 steels.
- Forged Components: Rough profiling of heavy steel forgings with stubborn outer oxide skins.
- Structural Component Fabrication: High-efficiency roughing of large flanges, heavy pins, and structural tubes.
5. Compatibility & Rigidity Standards
Perfectly optimized for standard multi-axis CNC turning centers, heavy-duty industrial lathes, and high-production automated systems. Out-of-the-box compatibility with tooling blocks from major equipment manufacturers including Mazak, Okuma, Haas, Doosan, and DMG Mori. Due to the wide chip-breaking window of the UX breaker layout, maintaining a rigid tool setup is recommended to maximize the performance of the AC820P grade.
6. Grade Cross-Comparison Matrix
See how the Sumitomo AC820P flagship steel turning grade compares to industry equivalents:
| Brand Manufacturer | Equivalent Grade Designation | ISO Application Scope |
|---|---|---|
| SUMITOMO | AC820P (Primary Choice) | ISO P15 - P25 (General to Heavy Steel Roughing) |
| Sandvik Coromant | GC4425 / GC4325 | ISO P15 - P25 |
| Kennametal | KCP25B / KCP25 | ISO P15 - P25 |
| Iscar | IC8250 / IC825 | ISO P15 - P25 |
7. Global Procurement Trust & Authority
🛡️ Verifiable Production Performance: Laboratory testing data from official Sumitomo Electric engineering catalogs demonstrates that the **AC800P series coated with Absotech® Platinum technology** achieves a **2.0x improvement in coating adhesion strength** and significantly higher wear resistance over standard market CVD inserts during steel machining. We guarantee 100% factory original, authentic sealed packages sourced straight via secure B2B supply lines.
💬 Real Global Machinist Reviews
"Switched to these WNMG 431-UX inserts for a long production run on 4140 steel. The AC820P grade holds up remarkably well against flank wear. We've seen a solid 35% increase in tool life per edge compared to our previous supplier."
"Sehr gute Spanbrechung! The UX geometry clears out stringy chips effortlessly on our roughing passes. The surface coating doesn't flake even under high-temperature dry runs."
"Very reliable grade for standard automated turning cycles. Predictable tool wear means we can run the shift with minimal intervention. Highly recommended for general steel shops."
"AC820Pは耐摩耗性と靭性のバランスが非常に良いです。通常の鋼加工において、チッピングが大幅に減少し、加工面も安定しています。"
"Six edges per insert gives us excellent value. The UX chipbreaker keeps the cutting pressures manageable, allowing us to push higher depths of cut without worrying about loading up the spindle."
8. Machining FAQ & Troubleshooting
Q: What makes the Sumitomo AC820P grade stand out for general steel turning?
A: AC820P leverages the Absotech® Platinum CVD coating layout, engineered for excellent balance. It delivers exceptional crater and flank wear resistance across the ISO P15-P25 range, making it the most versatile choice for standard steel roughing jobs.
Q: Can I run this WNMG080404N-UX insert for finish-turning applications?
A: The UX profile is primarily built for medium to heavy roughing depths. For fine finishing where the depth of cut is minimal, a dedicated finishing geometry like the FA or FB chipbreaker should be used to ensure proper chip control.
Q: When should I choose AC820P over a tougher grade like AC830P?
A: Choose AC820P for general-purpose turning, continuous paths, or light interruptions where higher cutting speed ($Vc$) is desired. Switch to AC830P if your application involves severe interruptions, heavy scale, or severe mechanical shocks.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Optimized for all ISO P steel variations, including carbon steels (S45C/1045), alloy steels (SCM440/4140), and structural steels (SS400/A36).
Machining Troubleshooting Guide: If micro-chipping occurs along the cutting edge, consider reducing the feed rate ($f$) or shifting to the tougher AC830P grade. If rapid flank wear occurs due to high heat, lower the cutting speed ($Vc$) or ensure stable coolant delivery.
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.