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.
Need Help With Sumitomo Inserts?
Looking for a Sumitomo equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This Sumitomo insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.