SUMITOMO WNMG080404N-SU AC510U Carbide Turning Insert (WNMG 431-SU Metric & Imperial)
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SUMITOMO WNMG080404N-SU AC510U (WNMG 431-SU) Super PVD Carbide Steel Turning Insert
1. Product Overview
"Which carbide insert grade and chipbreaker profile provide the highest process security and longest tool life when turning medium carbon steels under interrupted cut conditions on CNC lathes?"
The SUMITOMO WNMG080404N-SU AC510U (internationally cross-referenced under imperial nomenclature as WNMG 431-SU) represents the pinnacle of industrial-grade indexable turning technology. By combining Sumitomo's proprietary Super PVD coating architecture with the advanced SU Type Chipbreaker geometry, this negative double-sided trigon insert ensures exceptional chip control, reduced cutting forces, and unparalleled flank wear resistance during continuous to heavily interrupted steel turning operations.
2. Product Key Features
- Advanced AC510U Super PVD Coating: Utilizing a highly dense TiAlN-based multi-layered PVD technology, the AC510U grade exhibits a micro-hardness exceeding 30 GPa, drastically mitigating crater wear and thermal cracking in heavy-load conditions.
- Optimized SU-Type Chip Breaker Geometry: Designed with a variable rake angle and a unique multi-stage deflector wall that guarantees excellent chip breaking performance across a wide depth of cut range ($a_p = 1.0\text{mm} - 4.0\text{mm}$), preventing the formation of birds-nesting ribbon chips.
- Double-Sided Trigon Economy: Features a $80^\circ$ negative configuration providing 6 distinct cutting edges per insert, delivering highly cost-effective manufacturing cycles without compromising dimensional tracking tolerances.
- High-Toughness Substrate Matrix: The ultra-fine grain WC-Co cemented carbide matrix offers exceptional fracture toughness, making it highly reliable against mechanical shock in interrupted cuts.
3. Technical Specifications & Dimension Matrix
🔍 ISO / ANSI Nomenclature Decoding Matrix
Trigon Shape ($80^\circ$)
0° Relief Angle
M-Class Tolerance
With Hole & Slots
Edge Length ($9.525\text{mm}$)
Thickness ($4.76\text{mm}$)
Nose Radius ($0.4\text{mm}$)
Steel Medium Breaker
| Dimension Parameter | Metric Specification (ISO) | Imperial Specification (ANSI) |
|---|---|---|
| Inscribed Circle (IC) | $9.525\text{ mm}$ | $0.375\text{ in}$ (3/8") |
| Thickness (S) | $4.76\text{ mm}$ | $0.187\text{ in}$ (3/16") |
| Corner Nose Radius ($r_\epsilon$) | $0.4\text{ mm}$ | $0.0156\text{ in}$ (1/64") |
| Fixing Hole Diameter ($d_1$) | $3.81\text{ mm}$ | $0.150\text{ in}$ |
📊 Recommended Structural Cutting Parameters
| Workpiece Material Category | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Carbon / Alloy Steels (HB180-280) | $120 - 280\text{ m/min}$ ($390 - 920\text{ SFM}$) | $0.15 - 0.40\text{ mm/rev}$ ($0.006 - 0.016\text{ ipr}$) | $0.5 - 3.5\text{ mm}$ ($0.020 - 0.138\text{ in}$) |
| Die / Mold Steels (Pre-hardened) | $90 - 180\text{ m/min}$ ($295 - 590\text{ SFM}$) | $0.12 - 0.30\text{ mm/rev}$ ($0.005 - 0.012\text{ ipr}$) | $0.4 - 2.5\text{ mm}$ ($0.016 - 0.098\text{ in}$) |
This WNMG0804 / WNMG432 sequence requires standard external or internal negative turning toolholders with a 95° approach angle.
Browse Matching MWLNR/L & WWLNR/L Toolholders →4. Product Application Scenarios
The unique properties of the AC510U structural matrix allow seamless performance across high-load, heavy-duty components manufacturing, including:
5. Toolholder & Equipment Compatibility
Strictly compliant with standard pocket dimensions, this insert integrates natively into global standard hardware:
- External Toolholders: MWLNR2020K08, MWLNR2525M08, WWLNR2525M08 (Metric) / MWLNR16-4B, WWLNR16-4B (Imperial).
- Boring Bars (Internal): A32S-MWLNR08, A40T-MWLNR08 (Minimum bore diameter $\ge 40\text{mm}$).
- Machine Fitment: Compatible with all major CNC turning centers (Mazak, Haas, Doosan, Okuma) using standard indexable clamping systems.
6. Industrial Grade Comparison Matrix
| Brand | Equivalent Grade Reference | Application Range | Coating Type |
|---|---|---|---|
| SUMITOMO | AC510U (Target) | ISO P05 - P20 / Medium to Interrupted Cut | Super PVD TiAlN Multi-layer |
| Sandvik Coromant | GC4315 / GC4415 | ISO P15 / General Purpose Steel | Inveio™ CVD Al2O3 |
| Kennametal | KCP10B / KC5010 | ISO P10 / High Speed Finishing-Medium | PVD Advanced TiAlN |
| Iscar | IC8150 / IC8250 | ISO P15 - P30 / Shock-loaded Turning | MTCVD α-Al2O3 TiCN |
7. Verified Global Performance Evaluations
Real industrial data compiled from global manufacturing lines validating tool longevity and finish precision:
"Swapped out our standard CVD inserts for the Sumitomo AC510U on a shaft roughing job. The SU chipbreaker breaks stringy chips perfectly at 0.012 ipr. Tool life increased by 35% under heavy mechanical shock."
"Die WNMG080404N-SU ist unsere erste Wahl für die Bearbeitung von C45-Stahlkomponenten. Die PVD-Beschichtung hält den hohen Temperaturen stand und liefert makellose Oberflächengüten ohne Abplatzungen."
"Utilizzato su un tornio parallelo CNC per la sgrossatura di alberi di trasmissione. Eccellente tolleranza geometrica. Spedizione rapida e imballaggio originale sigillato."
"SCM440の断続切削ラインに投入。刃先のチッピングが激減し、無人運転の安定性が大幅に向上しました。AC510Uの耐摩耗性は抜群です。"
8. Technical Machining FAQ
Q: What makes the AC510U grade superior to generic CVD grades for steel turning?
A: Unlike standard thick CVD coatings that can suffer from micro-cracking due to cooling cycles in interrupted cuts, the AC510U Super PVD multi-layer thin coating maintains high compressive stress. This yields far better resistance to edge chipping and thermal shock while keeping the cutting edge extremely sharp.
Q: Can I use the WNMG080404N-SU insert on stainless steel alloys?
A: While optimized primarily for P-class carbon and alloy steels, the AC510U grade features a universal PVD matrix that performs capably in light-load, stable operations of ferritic and martensitic stainless steels (ISO M05 - M15). For work hardening automotive stainless steels, we recommend dedicated chipbreakers.
Q: What is the optimal chip-breaking zone for the SU-type geometry?
A: The SU breaker operates ideally within a depth of cut ($a_p$) range from $1.0\text{mm}$ to $4.0\text{mm}$ paired with a feed rate profile from $0.15\text{mm/rev}$ to $0.45\text{mm/rev}$. Pushing parameters below this may lead to stringy chip ribbon generation.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Optimized for P-class alloys (carbon steels, high-tensile structural steels, alloy casting elements) under heavy structural parameters. Capable of processing structural die blocks and pre-hardened components.
Machining Troubleshooting Guide: If flank wear scales up prematurely, reduce raw speed ($v_c$) immediately or increase flow concentration of internal coolant jet. In the event of micro-chipping, verify that toolholder clamp blocks are secured to clear processing vibrations.
Authorized Reference Documentation: Engineering standards and material designations conform to ISO 1832:2017 (Indexable inserts for cutting tools) and ANSI B212.4 specifications. Tool performance indicators are cross-verified with official laboratory testing databases provided by Sumitomo Electric Hardmetal Corp.
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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.