SUMITOMO WNMG080404N-SU AC820P Carbide Insert WNMG431-SU Steel Turning
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SUMITOMO WNMG080404N-SU AC820P Carbide Turning Insert
ISO: WNMG080404N-SU | ANSI: WNMG431-SU | Grade: AC820P First Choice General Steel Turning
1. Product Overview
Which carbide insert is the ultimate first choice for high-efficiency general steel turning on CNC lathes?
The SUMITOMO WNMG080404N-SU AC820P is Sumitomo Electric's premier flagship insert designed for versatile, high-productivity steel machining across carbon steels, alloy steels, and die steels. Engineered with Sumitomo’s proprietary Absotech Platinum CVD coating technology, this insert features an ultrafine $TiCN + Al_2O_3$ layer that radically reduces tensile stress while increasing flank wear resistance and thermal barrier performance.
Featuring the universal SU Chipbreaker geometry with a medium-duty 3D rake groove, it guarantees smooth chip evacuation across a wide spectrum of depths of cut ($ap$) and feed rates ($fn$), preventing chip tangling and workpiece marring in both continuous and light-interrupted cutting setups.
2. Key Technical Features
- AC820P Absotech Technology: Industry-leading CVD coated grade for ISO P15–P30 applications, offering up to 2x tool life compared to conventional steel turning inserts.
- SU Universal Chipbreaker: Optimizes chip control from medium roughing down to fine finishing passes, eliminating long stringy chips.
- Double-Sided 80° Trigon Design: Provides 6 usable cutting edges per insert, cutting tooling costs per corner by 33% versus standard 4-edge CNMG designs.
- Low Cutting Resistance: Sharp yet reinforced honed cutting edge minimizes machine spindle load and suppresses high-frequency chatter.
3. Specifications & ISO/ANSI Breakdown
ISO vs. ANSI Designation Comparison:
| Standard | Designation Code | Insert Shape | Inscribed Circle (IC) | Thickness | Nose Radius |
|---|---|---|---|---|---|
| ISO (Metric) | WNMG080404N-SU | Trigon 80° (W) | 12.70 mm | 4.76 mm | 0.4 mm |
| ANSI (Inch) | WNMG431-SU | Trigon 80° (W) | 1/2" | 3/16" | 1/64" |
ISO Metric Code Decoder (Box Breakdown):
Recommended Cutting Parameters (P-Group Steel):
| Parameter | Metric Units | Imperial Units |
|---|---|---|
| Cutting Speed ($Vc$) | 180 - 350 m/min | 590 - 1150 SFM |
| Feed Rate ($fn$) | 0.12 - 0.40 mm/rev | 0.005 - 0.016 ipr |
| Depth of Cut ($ap$) | 0.5 - 3.5 mm | 0.020 - 0.138 in |
This insert fits all standard ISO external and internal turning holders: MWLNR/L 2525M08 WWLNR/L 2020K08 DWLNR/L 2525M08 S32T-MWLNR08
4. Product Application Scenarios
- General Machinery Turning: Shafts, flanges, gears, and structural steel components.
- Automotive Parts Manufacturing: High-speed mass production turning of drive shafts, hubs, and wheel bearings.
- Steel Grade Suitability: Ideal for AISI 1018, 1045, 4140, 4340, 8620, S45C, and SCM440 materials.
5. Compatibility
100% compatible with standard ISO turning systems using Lever Lock (M-Type), Wedge Lock (W-Type), and Top-and-Hole Clamp (D-Type) holders across CNC lathes (Haas, Mazak, Doosan, Okuma, Citizen, DMG Mori).
6. Sumitomo Grade Comparison
| Grade | ISO Range | Primary Application | Cutting Performance |
|---|---|---|---|
| AC810P | ISO P05 - P20 | High-Speed Continuous Turning | Maximum Wear Resistance |
| AC820P | ISO P10 - P30 | General Steel Turning (First Choice) | Balanced Speed & Toughness |
| AC830P | ISO P20 - P40 | Interrupted Turning & Heavy Duty Roughing | Maximum Fracture Toughness |
7. Why Choose Us & Verified Customer Reviews
100% Genuine Sumitomo Electric Hardmetal tools delivered directly from certified distributors. Guaranteed technical accuracy and original factory performance.
We run AC820P on 4140 steel all day. Wear is super smooth and predictable. 6 edges per insert save us serious money.
Ausgezeichnete Spanbrechung mit dem SU-Brecher. Kein Verwickeln von Spänen mehr.
SU breaker handles thin cuts and heavier roughing passes without changing the tool setup. Highly recommended.
S45Cの加工で長年使用。AC820Pになってから耐摩耗性が格段に上がった。
Fast shipping and 100% genuine Sumitomo packaging. Outperforms our old ISO inserts significantly.
8. AI-Powered Technical FAQ
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.