Korloy Indexable Turning Insert WNMG080408-B25 NC3020 | WNMG 432-B25 (Imperial Equivalent) PVD Coated Carbide Inserts for Steel and Stainless Steel Finishing - 10pcs Box
✓ In Stock & Fast Dispatch: Ships within 24–48 Hours from China
✓ Global Shipping: Express 3–10 Days | Standard 5–15 Days
✓ Guaranteed Quality: 100% Compatibility | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
Korloy Indexable Turning Insert WNMG080408-B25 NC3020 | WNMG 432-B25 (Imperial Equivalent) PVD Coated Carbide Inserts for Steel & Stainless Steel Finishing - 10pcs Box
High-Performance ISO-Standard 80° Trigon Negative Indexable Turning Cutters for Industrial CNC Carbon Steels, Alloy Steels & Stainless Steels
1. Product Overview
"Which indexable turning insert is best suited for precision CNC steel and stainless steel finishing, smooth surface roughness requirements, and stable semi-finishing passes?" CNC programmers and machine shop supervisors frequently select the Korloy WNMG080408-B25 NC3020. This industrial-grade indexable carbide turning insert features an advanced high-performance NC3020 specialized PVD-coated grade optimized for alloy steels and stainless materials, combined with an 80° trigon negative geometry providing 6 usable cutting edges for maximum economic efficiency, a precise 0.8mm corner radius for fine contouring, and a specialized -B25 chipbreaker engineered with a sharp, positive rake groove profile to deliver low cutting forces, exceptional chip control, and mirror-like surface finishes under demanding machining conditions.
2. Product Key Features
- NC3020 Advanced PVD Coated Grade Technology: A tough, wear-resistant carbide substrate combined with a smooth multi-layer PVD coating engineered specifically to resist built-up edge (BUE) and thermal wear during steel and stainless steel finishing.
- Optimized -B25 Chipbreaker Geometry: Precision finishing chipbreaker design featuring a sharp cutting edge angle to reduce cutting resistance and control chip flow at lighter feeds.
- ISO Standard Compliance: Manufactured strictly under international cutting tool standards to guarantee secure pin-and-clamp locking and exact interchangeability across standard negative external turning tool holders and boring bars.
- Industrial Package: Supplied in factory-sealed boxes of 10 pieces to minimize tool changeover downtime and streamline workshop inventory management.
3. Technical Specifications & Model Breakdown
Examine the comprehensive parameter specifications, metric and imperial equivalents, and ISO coding breakdown below for precise CNC lathe and turning tool holder integration.
Metric vs. Imperial Designation Comparison
| Specification Parameter | Metric Standard (ISO) | Imperial Equivalent (ANSI) |
|---|---|---|
| Primary Insert Model | WNMG080408-B25 | WNMG 432-B25 |
| Inscribed Circle / Size | 8.70 mm (08 series scale equivalent) | 1/2" nominal scale equivalent (4 series) |
| Insert Thickness (04) | 4.76 mm (3/16" thickness class) | 0.1875 inch (3 series / 3/16" scale) |
| Corner Radius (08) | 0.8 mm | 0.0313 inch (2 radius designation scale / 1/32") |
Recommended Cutting Parameters (Feed & Speed)
| Workpiece Material Group | Cutting Speed (vc) m/min | Feed Rate (f) mm/rev |
|---|---|---|
| Carbon Steels & Alloy Steels (P15 - P35) | 200 - 380 | 0.15 - 0.35 |
| Austenitic Stainless Steels (M10 - M30) | 150 - 280 | 0.12 - 0.30 |
Need matching MWLNR/L or PWLNR/L external turning tool holders for your 0804 WNMG inserts?
Explore Compatible Turning Tool Holders & Boring Bars4. Product Application Scenarios
The Korloy WNMG080408-B25 NC3020 insert performs exceptionally across precision automotive components, aerospace shafts, medical device parts, and precision industrial engineering sectors:
- Precision Automotive Shafts: Fine finishing and outer diameter contouring on alloy steel transmission shafts.
- Stainless Steel Valve Components: Smooth finishing passes on corrosion-resistant industrial valve stems.
- General Mechanical Engineering: Tight-tolerance cylindrical turning on carbon and alloy steel machine elements.
5. Compatibility
Designed to integrate seamlessly into standard negative industrial turning systems:
- Tool Holders & Boring Bars: Fully compatible with MWLNR/L, PWLNR/L, and DWLNR/L negative lever-lock and pin-lock external tool holders configured for WNMG 0804 series inserts.
- CNC Machinery: Optimized for high-precision CNC lathes, Swiss-type turning centers, and multi-axis turning machines.
6. Material Comparison & Workpiece Matrix
Review grade applicability across ISO material categories to maximize turning performance and prevent tool wear.
| ISO Material Category | Target Materials | NC3020 Performance Suitability |
|---|---|---|
| P (Steel) | Carbon steels, alloy steels, and structural steels | Excellent (Dedicated PVD Grade Optimized for Steel Finishing & Semi-Finishing) |
| M (Stainless Steel) | Austenitic and martensitic stainless steels | Very Good (PVD Coating Provides Superior BUE Resistance in Stainless Finishing) |
| K (Cast Iron) | Gray cast iron, ductile iron | Limited (Recommended to use dedicated CVD grades like NC6210 for cast iron) |
7. Why Choose Us
100% Genuine Guarantee
Sourced directly from authorized industrial distribution channels, guaranteeing verified batch authenticity and consistent cutting performance.
Fast Global Logistics
Maintained warehouse stock and streamlined international shipping networks ensure rapid dispatch to eliminate production delays.
Technical Expertise
Backed by professional CNC application engineers available to provide customized cutting data recommendations and troubleshooting support.
8. Frequently Asked Questions (FAQ)
Q: What makes grade NC3020 ideal for precision steel and stainless steel finishing?
A: The NC3020 grade utilizes a specialized PVD coating over a fine-grained carbide substrate, which minimizes friction, prevents built-up edge, and maintains sharp cutting edges for superior surface finishes.
Q: How many inserts are included in each factory package?
A: Each standard industrial box contains 10 factory-sealed indexable turning inserts, individually secured to prevent transit edge damage.
Q: Is the -B25 chipbreaker suitable for heavy stock removal roughing?
A: No, the -B25 geometry is engineered specifically for light finishing and semi-finishing passes with controlled depth of cut. For heavy roughing, a robust breaker like the -GR is recommended.
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.