SUMITOMO WNMG080408N-GU AC6030M Turning Insert (WNMG 432-GU) for Stainless Steel
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SUMITOMO WNMG080408N-GU AC6030M (WNMG 432-GU) Carbide Turning Insert
1. Product Overview
"Which indexable turning insert grade and chipbreaker topology provides the longest tool life and best adhesion resistance when machining difficult-to-cut austenitic or duplex stainless steels under variable thermal loads?"
The SUMITOMO WNMG080408N-GU AC6030M (internationally designated in imperial sizing as WNMG 432-GU) is an elite, high-reliability carbide indexable insert engineered specifically for medium roughing, continuous, and interrupted turning of **Stainless Steel (ISO M)** and exotic superalloys. Powered by Sumitomo’s breakthrough Absotech Platinum CVD coating technology, this insert solves the most critical issues in stainless machining: work-hardening, severe notch wear at the depth-of-cut line, and built-up edge (BUE) formation. The highly versatile GU chipbreaker geometry features a uniquely contoured positive rake angle profile that significantly lowers cutting resistance, suppresses thermal accumulation at the cutting edge, and ensures flawless, reliable chip evacuation across varying depths of cut.
2. Product Key Features
- Absotech Platinum Coating Technology: Formulated with a highly smooth, heat-resistant CVD multi-layer composition that reduces friction drag, drastically dropping cutting temperatures and eliminating micro-chipping.
- Universal GU Chipbreaker Design: Engineered with a broad chip-control window, delivering excellent chip breaking capabilities from medium sizing down to light multi-pass finishing.
- Double-Sided 80° Trigon Economy: Provides 6 structurally robust cutting edges per insert, lowering overall tooling cost-per-part on high-volume automated CNC production lines.
- Advanced Edge Toughness & Adhesion Resistance: The optimized substrate acts as a structural shield, eliminating premium coating peeling when encountering the heavy strain of work-hardened materials.
3. Technical Specifications & Dimension Matrix
| Standard Typology | Model/Grade Designation | Measurement Basis |
|---|---|---|
| ISO Designation | WNMG080408N-GU | Metric Standard (mm) |
| ANSI Designation | WNMG 432-GU | Imperial Standard (Inch) |
🔍 ISO Standard Code Breakdown: WNMG080408N-GU
Trigon Shape (80°)
0° Relief Angle
M-Class Tolerance
Top Chipbreaker pin
Edge Length (8.7mm)
Thickness (4.76mm)
Nose Radius (0.8mm)
General Universal Slot
📊 Recommended Cutting Parameters (Metric vs Imperial)
| Parameter Metric | Metric Values | Parameter Imperial | Imperial Values |
|---|---|---|---|
| Cutting Speed (Vc) | 90 - 200 m/min | Cutting Speed (SFM) | 295 - 656 SFM |
| Feed Rate (f) | 0.12 - 0.40 mm/rev | Feed Rate (IPR) | 0.005 - 0.016 ipr |
| Depth of Cut (ap) | 0.6 - 4.0 mm | Depth of Cut (DOC) | 0.024 - 0.157 inch |
This insert secures perfectly into standard external and internal turning toolholders. Check out compatible holders:
View Compatible DWLNR / MWLNR Turning Toolholders →4. Product Application Scenarios
Engineered to deliver exceptional operational metrics across challenging alloy and stainless environments:
- Chemical & Marine Valves: Turning and facing of highly corrosive, tough SUS316 / SUS316L stainless components.
- Aerospace Systems: Roughing and medium contours on titanium alloys, Inconel, and heat-resistant superalloys.
- Food Processing Equipment: Mass production turning of SUS304 shafts requiring tight dimensional stability and high surface integrity.
5. Compatibility & Rigidity Standards
Optimized for heavy-duty CNC lathes, multi-tasking turning centers, and conventional engine lathes. Delivers seamless performance across rigid machine platforms such as Mazak, DMG Mori, Okuma, Doosan, and Haas. Due to the high thermal stress characteristic of stainless steel turning, high-pressure flood coolant delivery is strongly recommended to optimize chip management and insert longevity.
6. Grade Cross-Comparison Matrix
Understand how the Sumitomo AC6030M grade compares across different major international insert standards:
| Manufacturer Brand | Equivalent Grade Designation | ISO Application Window |
|---|---|---|
| SUMITOMO | AC6030M (Primary Target) | ISO M20 - M35 (General & Interrupted Stainless Steel Machining) |
| Sandvik Coromant | GC2220 / GC2025 | ISO M20 - M35 |
| Kennametal | KCM25B / KCM35B | ISO M20 - M35 |
| ZCC.CT | YBM253 | ISO M20 - M35 |
7. Global Procurement Trust & Authority
🛡️ Verifiable Production Standards: Official laboratory testing and application case reports published by Sumitomo Electric demonstrate that the **AC6030M Absotech Platinum CVD grade** offers over **2x greater chipping resistance** and significantly improved coating adherence compared to standard industry tools under high-temperature stainless steel cycles. We guarantee absolute industrial authenticity by sourcing all products through certified authorized distribution lines.
💬 Real Global Machinist Reviews
"We had massive issues with built-up edge and notch wear turning 316L stainless cylinders. Switched to the WNMG 432-GU in AC6030M grade and tool life doubled immediately. Flawless surface finish."
"Perfekt für Edelstahl. The Absotech coating handles work-hardened zones without edge breakdown. Very stable tool behavior on our DMG Mori lathe."
"Excellent chip fragmentation inside the GU geometry land. It prevents long ribbon nests even when working at highly conservative feed depths."
"SUS304の加工で抜群の安定性です。他社製CVDチップで頻発していたクレーター摩耗やチッピングが、AC6030Mにしてから劇的に改善しました。"
"Six solid corners that hold up to continuous heat like a champion. Best economics per cutting edge for structural stainless parts."
8. Machining FAQ (Expert Troubleshooting)
Q: Why should I choose the AC6030M grade over standard steel turning inserts?
A: Standard steel inserts are built for carbon and alloy steels. The AC6030M is specifically formulated to combat the low thermal conductivity and severe work-hardening tendencies unique to stainless steel and high-temperature alloys.
Q: Can the WNMG080408N-GU configuration handle interrupted cuts?
A: Yes. The AC6030M grade covers the ISO M20–M35 application range, meaning it combines a rich, shock-resistant carbide core with a high-adhesion coating designed specifically to absorb light-to-medium structural shocks and intermittent cycles.
Q: What is the optimal chip control strategy for the GU chipbreaker on stringy stainless?
A: The GU chip groove functions best when kept within its intended parameters—ideally at a depth of cut ($a_p$) above 0.8mm. Maintaining a robust feed rate forces the expanding metal ribbon into the breaker geometry, causing it to snap reliably.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Compatibility Matrix (ISO Standards): Purpose-tuned for the ISO M20–M35 window (Austenitic, Ferritic, and Duplex Stainless Steels). Secondary capabilities include ISO S alloys (Titanium, Inconel, and cobalt-base superalloys).
Machining Troubleshooting Guide: If sudden thermal cracking occurs across the edge face, check that your coolant flow is uniform and steady, or consider running dry if using a modern high-speed thermal program. If aggressive notch wear appears at the depth-of-cut line, try using a varying-depth program or transition to a larger nose radius or round insert profile.
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.