Korloy WNMG080408-HM NC3020 (WNMG 432-HM) Steel Turning Insert (10pcs)
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The Original Korloy WNMG080408-HM NC3020 (ANSI: WNMG 432-HM) is the quintessential 80° Trigon Turning Insert for steel machining worldwide. Featuring a robust 0.8mm (1/32") corner radius, this insert provides the perfect combination of edge strength and versatility. Powered by the NC3020 CVD grade, it is optimized for high-speed continuous cutting of carbon and alloy steels, delivering exceptional wear resistance and reliability.
The Most Popular Choice: If you are unsure which insert to start with for steel turning, WNMG080408 is the answer. It fits all standard MWLNR/L tool holders and offers 6 high-performance cutting edges, making it the most cost-effective solution for CNC production.
Technical Specifications (ISO Metric vs. ANSI Inch):
| ISO Designation | WNMG 080408-HM |
| ANSI Designation | WNMG 432-HM |
| Corner Radius (r) | 0.8 mm / (1/32") |
| Grade | NC3020 (CVD Al2O3 Coated) |
| Chipbreaker | HM (Medium / Universal) |
Compatible Tool Holders (Matching Hyperlinks):
To ensure maximum stability and performance, we recommend pairing this insert with high-quality Korloy-compatible tool holders:
- External Turning: MWLNR/L Series (Standard 80° Trigon Holders)
- Internal Boring: S-MWLNR/L Boring Bars (Internal Turning)
- Multi-Tasking: WWLNR/L Series (Top-Clamp Stability)
Core Performance Benefits:
- Robust Semi-Roughing: The R0.8 radius handles higher feed rates and heavier loads than the 04 radius, reducing the risk of edge collapse during the first pass.
- Superior Heat Resistance: NC3020's multi-layered CVD coating acts as a thermal shield, preventing crater wear during dry or wet high-speed machining.
- Proven Chip Control: The HM chipbreaker excels in a wide "sweet spot" of feed rates, effectively curling and breaking chips to prevent surface scratching.
- 6 Edges for the Price of 4: The Trigon geometry offers two additional cutting edges compared to CNMG, lowering your tool costs by 33% instantly.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 200 - 350 m/min | 0.15 - 0.35 mm/rev | 1.0 - 4.0 mm |
| Alloy Steel (4140) | 160 - 280 m/min | 0.12 - 0.30 mm/rev | 1.0 - 3.5 mm |
Packaging: 10 pieces per box.
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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.