SUMITOMO WNMG080404N-UZ AC700G Cast Iron Turning Insert (WNMG 431-UZ Metric & Imperial)
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SUMITOMO WNMG080404N-UZ AC700G (WNMG 431-UZ) Absotech CVD Cast Iron Turning Insert
1. Product Overview
"Which indexable carbide insert grade and heavy-duty chipbreaker profile provides the longest tool life and superior thermal wear resistance during high-speed, heavy roughing of gray and ductile cast iron?"
The SUMITOMO WNMG080404N-UZ AC700G (internationally recognized in imperial dimensions as WNMG 431-UZ) is a premium industrial-grade indexable turning insert engineered explicitly for high-efficiency machining within the ISO K (Gray Iron, Ductile Iron, & Nodular Cast Iron) application window. Powered by Sumitomo’s breakthrough Absotech® coating technology, this insert integrates a revolutionary crystal-oriented thick $\alpha\text{-Al}_2\text{O}_3$ alumina and TiCN layer over a highly wear-resistant 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® Crystal Technology: Industry-leading CVD coating layout with a highly oriented crystal structure that eliminates micro-chipping and dramatically extends tool life during high-feed cast iron machining.
- UZ Heavy Roughing Design: Features an optimized, rigid cutting edge engineered to slice through casting scale, crust, and heavily interrupted 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) | 180 - 300 - 450 m/min | Cutting Speed (SFM) | 590 - 980 - 1470 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) | 0.8 - 3.5 - 5.5 mm | Depth of Cut (DOC) | 0.031 - 0.138 - 0.217 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 Powertrain Production: Large-scale OD turning and face roughing of cast iron engine blocks, brake drums, and flywheels.
- Heavy Machinery Components: Machining high-strength nodular iron housings, large hydraulic pump casings, and industrial gearboxes.
- Pump & Valve Manufacturing: Roughing cast iron impeller bodies, massive water pipeline valves, and compressor cylinders.
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 to withstand highly abrasive cast iron dust and scales.
6. Grade Cross-Comparison Matrix
See how the Sumitomo AC700G flagship cast iron turning grade compares to industry equivalents:
| Brand Manufacturer | Equivalent Grade Designation | ISO Application Scope |
|---|---|---|
| SUMITOMO | AC700G (Primary Choice) | ISO K05 - K20 (High-Speed to Interrupted Rough Cast Iron Turning) |
| Sandvik Coromant | GC3225 / GC3210 | ISO K10 - K25 |
| Kennametal | KCK15B / KCK20 | ISO K10 - K25 |
| Iscar | IC5005 / IC5015 | ISO K05 - K20 |
7. Global Procurement Trust & Authority
🛡️ Verifiable Production Performance: Laboratory testing data from official Sumitomo Electric engineering catalogs demonstrates that the **AC700G series coated with Absotech® technology** achieves a **2.5x improvement in coating adhesion strength** and up to **200% longer tool life** over standard market CVD inserts during dry cast iron 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 massive run of ductile iron brake drums. The abrasive wear resistance is top-tier. Usually, casting scale strips the coating instantly, but this AC700G grade held up perfectly for 3 full shifts."
"Hervorragende Leistung! The chip breaking on nodular cast iron is excellent even at deeper passes. The UZ profile significantly reduces thermal loading on the machine spindle."
"Excellent predictability for automated production cells. Flaking is a thing of the past. Very good structural consistency corner-to-corner."
"AC700Gは鋳鉄加工において圧倒的な耐摩耗性を誇ります。乾式切削での熱亀裂が全く出ず、長寿命でコストパフォーマンス最高です。"
"Fantastic tool economy with the 6 cutting edges. Hard to find an insert that handles both structural gray iron scale and high-speed cycles seamlessly like this one."
8. Machining FAQ & Troubleshooting
Q: What is the primary difference between Sumitomo AC700G and standard steel grades like AC800P?
A: AC700G is structurally optimized with thick Al2O3 coating layers to resist high abrasive friction and thermal cycling unique to cast iron (ISO K). Steel grades are balanced differently to prevent plastic deformation from continuous ductile steel chips.
Q: Can I use this WNMG080404N-UZ insert for finishing cast iron components?
A: The UZ chipbreaker profile is heavy roughing geometry. For tight micro-finishing requirements, a sharper geometry with lower cutting force like the G-class profiles or dedicated finishing breakers should be substituted.
Q: Is it recommended to run this cast iron insert dry or wet?
A: Dry machining is generally highly recommended for cast iron because it prevents thermal cracking of the tool edge. However, if micro-dust control is critical, ensure robust, uninterrupted high-volume flood coolant is applied uniformly.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): First choice for all ISO K cast iron variations (Gray cast iron FC/GG, Ductile cast iron FCD/GGG, and highly abrasive malleable irons).
Machining Troubleshooting Guide: If flank wear develops prematurely on the cutting border, reduce cutting speed ($Vc$) slightly or move to a harder grade. If chipping occurs due to heavy casting sand pockets, ensure the machine spindle is completely rigid and minimize workpiece overhang.
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.