SUMITOMO WNMG080404N-UZ AC820P Steel Turning Insert (WNMG 431-UZ Metric & Imperial)
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SUMITOMO WNMG080404N-UZ AC820P (WNMG 431-UZ) Absotech Platinum CVD Steel Turning Insert
1. Product Overview
"Which indexable carbide insert grade and heavy-duty chipbreaker profile provides the best tool life and thermal shock resistance during high-speed interrupted roughing of alloy steels?"
The SUMITOMO WNMG080404N-UZ AC820P (internationally recognized in imperial dimensions as WNMG 431-UZ) is a premier 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 CVD coating technology, this insert integrates a revolutionary ultra-smooth $\alpha\text{-Al}_2\text{O}_3$ alumina and thick TiCN layer over a highly fracture-resistant gradient carbide substrate. This advanced surface architecture dramatically reduces coating flaking, adhesive wear, and crater wear under severe mechanical stress. Designed with the robust UZ 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 evacuation during heavy roughing to medium-interrupted turning operations.
2. Product Key Features
- Absotech® Platinum Technology: Industry-leading CVD coating layout with a smooth crystal orientation that eliminates micro-chipping and dramatically extends tool life during high-feed steel milling and turning.
- UZ Heavy Roughing Design: Features an optimized, rigid cutting edge engineered to slice through scale, crust, and heavily interrupted steel surfaces without catastrophic edge fracture.
- Exceptional Thermal Shock 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-UZ | Metric Standard (mm) |
| ANSI Designation | WNMG 431-UZ | Imperial Standard (Inch) |
🔍 ISO Standard Code Breakdown: WNMG080404N-UZ
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 - 280 - 350 m/min | Cutting Speed (SFM) | 490 - 920 - 1150 SFM |
| Feed Rate (f) | 0.15 - 0.35 - 0.50 mm/rev | Feed Rate (IPR) | 0.006 - 0.014 - 0.020 ipr |
| Depth of Cut (ap) | 0.8 - 3.0 - 5.0 mm | Depth of Cut (DOC) | 0.031 - 0.118 - 0.197 inch |
This negative WNMG configuration requires rigid clamping toolholders to handle heavy roughing 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:
- Automotive Component Production: Large-scale OD turning of forged steel axles, transmission shafts, and drive gears.
- Heavy Machinery Construction: Machining high-tensile structural bars, large flange plates, and forged linking components.
- Oil & Gas Hardware: Roughing carbon steel pipe connections, premium couplers, and valve bodies.
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 aggressive chip evacuation and heavy forces of the UZ breaker layout, rigid tool clamping assemblies and strong workholding setups are strictly required.
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 to Interrupted High-Efficiency Steel Turning) |
| Sandvik Coromant | GC4425 / GC4325 | ISO P15 - P35 |
| Kennametal | KCP25B / KCP30 | ISO P20 - P35 |
| Iscar | IC8250 / IC830 | ISO P20 - P35 |
7. Global Procurement Trust & Authority
🛡️ Verifiable Production Performance: Laboratory testing data from official Sumitomo Electric engineering catalogs demonstrates that the **AC820P series coated with Absotech® Platinum technology** achieves a **2x improvement in coating adhesion strength** and up to **180% longer tool life** over standard market CVD inserts during interrupted steel machining. We guarantee 100% factory original, authentic sealed packages sourced straight via secure B2B supply lines.
💬 Real Global Machinist Reviews
"We put these WNMG 431-UZ inserts on a roughing job turning 4140 pre-hardened steel bars with heavy interruptions. The coating adhesion is unbelievable—zero flaking or chipping on the corners even after hours of high-impact cuts."
"Hervorragende Spanbrechung! The UZ geometry performs exactly as promised. It maintains excellent chip control even when we push the depth of cut over 4.0mm on carbon steel forgings."
"Very reliable grade for automated lines. The tool wear pattern is incredibly predictable, preventing any sudden structural breakdowns during unmanned shifts."
"AC820P材種は鋼の断続加工で圧倒的な寿命を示します。UZブレーカのおかげで切削抵抗が低く抑えられ、ビビリも発生しにくいです。"
"Getting 6 solid cutting corners out of a single insert makes a massive difference for our bottom line. Perfect balance of price and durability for heavy industrial machining."
8. Machining FAQ & Troubleshooting
Q: What is the primary difference between Sumitomo AC820P and other grades like AC830P?
A: AC820P serves as the ultimate balance grade for medium-to-roughing operations under diverse cutting conditions, while AC830P is a tougher, slower grade optimized exclusively for extreme, heavy-interrupted impact turning.
Q: Can I use this WNMG080404N-UZ insert for finishing operations?
A: The UZ chipbreaker profile is custom-engineered for heavy material removal and medium roughing. For high-accuracy finishing applications, a tighter geometry like the NE or FB style is recommended.
Q: Is it better to run this steel turning insert wet or dry?
A: Thanks to the high thermal protection of the Absotech Platinum layer, it runs exceptionally well dry at high speeds. However, during heavily interrupted cuts, continuous flood coolant helps maintain part size consistency and flushes out chips.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Premium choice for all ISO P steel variations (carbon steel, structural steel, alloy steels like 4140/4340, and tool steels). Highly adaptable for light interrupted machining of ductile cast iron (ISO K).
Machining Troubleshooting Guide: If crater wear develops prematurely on the top rake surface, increase cutting speed ($Vc$) slightly or switch to a harder grade. If micro-chipping occurs during severe interruptions, ensure that your setup rigidity is fully optimized or slightly reduce feed rates.
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.