Korloy CNMG120404-HS PC9030 Stainless Steel Finishing Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CNMG120404-HS PC9030 (ANSI Standard: CNMG 431) is a high-performance PVD-coated carbide insert specifically optimized for precision finishing of Stainless Steel. Featuring the specialized HS chipbreaker, this insert is designed with a sharp rake angle to reduce cutting resistance and minimize the heat that causes work hardening. The PC9030 grade's ultra-smooth coating prevents built-up edge (BUE), ensuring a mirror-like surface finish and exceptional dimensional accuracy on 300-series and 400-series stainless steels.
Finishing Excellence: The HS geometry is much sharper than the HM series, allowing for extremely light depths of cut while maintaining perfect chip breakability.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG120404-HS |
| ANSI Code | CNMG 431 |
| Grade | PC9030 (Premium PVD for Stainless & HRSA) |
| Chipbreaker | HS (Precision Finishing) |
Core Performance Benefits:
- Superior Surface Quality: The R0.4 nose radius combined with HS geometry minimizes radial cutting forces, preventing chatter and vibration.
- High-Toughness Substrate: Specialized PVD-coated carbide provides the impact resistance needed for small-diameter precision parts.
- Anti-Adhesion Technology: Extremely smooth coating surface prevents "chip welding," which is critical for maintaining tool life in gummy 304/316 stainless.
- Precision Chip Control: Effectively breaks chips even at shallow depths of cut (as low as 0.2mm), protecting the workpiece from scratches.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (304/316) | 120 - 240 m/min | 0.05 - 0.20 mm/rev | 0.2 - 2.0 mm |
| Heat Resistant Alloys (Inconel) | 30 - 80 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.5 mm |
Compatible Tool Holders:
For precision finishing, we recommend high-stability D-Type or M-Type holders:
- External Turning: PCLNR/L 2020K12 / PCLNR/L 2525M12 / DCLNR/L 2525M12
- Internal Boring: S25S-PCLNR12 / S32T-PCLNR12
Finishing Pro-Tip: HS vs. HM Chipbreaker
Which geometry is right for your stainless job?
Sharper edge. Best for shallow cuts, high surface finish requirements, and preventing work hardening in delicate parts.
Stronger edge. Best for general-purpose turning where you need a balance between material removal and finish.
Machinist's Tip: If you are experiencing "bird-nesting" chips during fine finishing passes, the HS breaker is the solution to force the chip to curl and break at lower depths of cut.
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.