SUMITOMO WNMG080404N-SX AC820P Steel Turning Insert (WNMG 431-SX Metric & Imperial)
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SUMITOMO WNMG080404N-SX AC820P (WNMG 431-SX) Absotech CVD Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and roughing chipbreaker profile provides the highest wear resistance and edge security during high-efficiency general rough turning of carbon and alloy steels?"
The SUMITOMO WNMG080404N-SX AC820P (internationally cross-referenced under imperial nomenclature as WNMG 431-SX) is a premium industrial-grade indexable turning insert engineered explicitly for high-efficiency machining within the ISO P (Carbon Steel, Alloy Steel, & Mold Steel) application window. Powered by Sumitomo’s breakthrough Absotech® platinum crystal-oriented coating technology, this insert integrates a revolutionary thick crystal-aligned $\alpha\text{-Al}_2\text{O}_3$ alumina layer over a highly fracture-resistant tungsten carbide substrate. This advanced surface architecture dramatically reduces coating flaking, crater wear, and thermal deformation under elevated cutting temperatures. Designed with the aggressive SX chipbreaker geometry, it features an optimized land rigidity and a wide pocket configuration that effectively handles heavy scale, minimizes cutting forces, and ensures excellent chip evacuation during medium roughing to light interrupted turning operations.
2. Product Key Features
- Absotech® Platinum CVD Coating Layer: Industry-leading CVD technology with an ultra-smooth coating surface that eliminates adhesion micro-chipping and dramatically extends tool life during high-speed steel machining.
- SX Rigid Edge Design: Features an optimized cutting edge engineered to slice through heavy forged skins and highly irregular surfaces without premature edge failure.
- Exceptional Plastic Deformation Resistance: The specialized multi-layer structural chemistry protects the internal carbide core from rapid cyclical temperature spikes during high-feed turning.
- Negative Trigon Economy: Double-sided configuration provides 6 robust, high-strength cutting edges per insert, lowering total tooling costs per component in massive production runs.
3. Technical Specifications & Dimension Matrix
| Standard Typology | Model/Grade Designation | Measurement Basis |
|---|---|---|
| ISO Designation | WNMG080404N-SX | Metric Standard (mm) |
| ANSI Designation | WNMG 431-SX | Imperial Standard (Inch) |
🔍 ISO Standard Code Breakdown: WNMG080404N-SX
Trigon Shape (80°)
0° Relief Angle
M-Class Tolerance
With Hole & Slots
Edge Length (8.7mm)
Thickness (4.76mm)
Nose Radius (0.4mm)
Rigid Roughing Breaker
📊 Recommended Cutting Parameters (Metric vs Imperial Comparison)
| Parameter Metric | Metric Recommended Values | Parameter Imperial | Imperial Recommended Values |
|---|---|---|---|
| Cutting Speed (Vc) | 180 - 280 - 380 m/min | Cutting Speed (SFM) | 590 - 920 - 1250 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 heavy 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:
- High-Efficiency Automotive Turning: Primary choice for stable, high-speed continuous to light interrupted rough turning of structural alloy steel components.
- Heavy Machine Shafting: Rough profiling of large coupling tubes, industrial spindles, and high-pressure flanges containing tough casting or forged skins.
- General Engineering Parts: High-speed material removal across carbon steels (S45C/C45) and pre-hardened mold steels.
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 SX 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 - P30 (General High-Speed Steel Roughing) |
| Sandvik Coromant | GC4425 / GC4325 | ISO P15 - P35 |
| Kennametal | KCP10B / KCP25B | ISO P10 - P35 |
| Iscar | IC8250 / IC8150 | ISO P15 - P35 |
7. Why Choose Us & Global Procurement Trust
🛡️ Verifiable Production Performance: Engineering data from official Sumitomo Electric technical cutting reports demonstrates that the **AC800P series coated with Absotech® platinum technology** achieves up to a **2x increase in chipping resistance** and superior adhesion strength over traditional market CVD coatings during heavy steel turning operations. We guarantee 100% factory original, authentic sealed packages sourced straight via secure B2B supply lines.
💬 Real Global Machinist Reviews
"Switched to these WNMG 431-SX AC820P inserts for our automotive shaft component line. The tool wear predictability is unmatched. We are getting twice the parts per edge compared to our previous CVD brand."
"Sehr gute Verschleißfestigkeit bei hohen Schnittgeschwindigkeiten! The Absotech layer handles crater wear flawlessly under dry cutting parameters. Exceptional quality control."
"Excellent balance of toughness and hardness for carbon steel turning. The SX breaker cleans up chips nicely even at variable depths of cut."
"AC820Pの耐摩耗性は抜群です。高速加工時でも刃先がダレず、安定した寸法精度を維持できます。信頼の住友ブランドです。"
"Fantastic economy with 6 cutting edges. The rigid layout handles rough cast surfaces beautifully without breaking."
8. Machining FAQ & Troubleshooting
Q: What makes the Sumitomo AC820P grade unique for steel turning?
A: The AC820P utilizes crystal-oriented Absotech® Platinum CVD technology specifically optimized to combat the cratering and thermal stress typical of high-speed steel machining. It delivers unparalleled wear resistance and predictable edge life across the ISO P15-P30 range.
Q: Can I run this WNMG080404N-SX insert for heavy interrupted roughing?
A: While the SX chipbreaker has an exceptionally rigid edge design that can handle light interruptions, the AC820P grade is balanced toward high wear resistance. If your application involves severe, high-impact interrupted cuts, we recommend stepping up to the tougher AC830P grade to prevent micro-chipping.
Q: What troubleshooting steps should I take if plastic deformation occurs?
A: Plastic deformation indicates that the cutting edge temperature is too high. Consider reducing your cutting speed ($Vc$) or checking your coolant delivery to ensure high-pressure flow directly hits the cut zone. Alternatively, reducing the feed rate ($f$) will lower the thermal load on the insert tip.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Highly optimized for all ISO P steel variations, including carbon steels (S45C/C45), alloy steels (SCM440/42CrMo4), tool steels, and pre-hardened mold steels up to 35 HRC.
Machining Troubleshooting Guide: If edge chipping occurs during interrupted cuts, consider reducing the feed rate ($f$) slightly or switching to a tougher grade. If rapid crater wear occurs at high speeds, slightly lower the cutting speed ($Vc$) or verify your coolant concentration levels.
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.