Korloy WNMG080404-HS PC9030 (WNMG 431-HS) Stainless Steel Finishing Insert (10pcs)
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The Original Korloy WNMG080404-HS PC9030 (ANSI: WNMG 431-HS) is a premier 80° Trigon Turning Insert specifically engineered for High-Precision Finishing of Stainless Steel and Super Alloys. This insert features the HS Chipbreaker, renowned for its ultra-sharp cutting edge that significantly reduces cutting resistance and prevents work-hardening. Combined with the PC9030 PVD Grade, it delivers an exceptional surface finish and superior anti-bonding performance in gummy materials.
Superior Finish Quality: The HS geometry is designed to "slice" through stainless steel even at very shallow depths of cut. If you need to maintain tight tolerances and a mirror finish on 304 or 316 stainless parts, the WNMG080404-HS is your definitive solution.
Technical Specifications (ISO Metric vs. ANSI Inch):
| ISO Designation | WNMG 080404-HS |
| ANSI Designation | WNMG 431-HS |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | PC9030 (Premium PVD) |
| Chipbreaker | HS (Finishing / Sharp Edge) |
Recommended Cutting Parameters:
Achieve the best productivity with these recommended speeds and feeds for Stainless Steel:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| 304/316 Stainless Steel | 120 - 200 m/min | 0.05 - 0.15 mm/rev | 0.1 - 1.5 mm |
| Heat Resistant Alloys | 40 - 90 m/min | 0.05 - 0.12 mm/rev | 0.1 - 1.0 mm |
Compatible Tool Holders:
Ensure maximum stability by using high-quality Korloy-compatible tool holders:
- External Turning: MWLNR/L Series (Standard 80° Trigon)
- Internal Boring: S-MWLNR/L Series Boring Bars
Core Performance Benefits:
- Anti-Bonding PVD Coating: The specialized PC9030 coating reduces chemical affinity between the insert and the workpiece, preventing "Built-up Edge" (BUE).
- Sharp HS Geometry: Optimized for low cutting forces, which helps in preventing vibration and chatter on long-overhang boring bars or thin shafts.
- Extreme Dimensional Accuracy: The 0.4mm (R0.4) radius is ideal for high-precision finishing where fine tolerances are critical.
- 6 Edges for the Price of 4: Like all WNMG inserts, this offers 6 precision cutting edges, providing a massive 50% increase in productivity over CNMG inserts.
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Grade & Chipbreaker Comparison
HS vs. HM: Use the HS chipbreaker for precision finishing passes (ap < 1.0mm) to achieve the best surface quality. If you need a more versatile tool for general machining and semi-finishing, consider the HM chipbreaker for increased edge strength.
Packaging: 10 pieces per box.
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.