Korloy CNMG090304-HS PC9030 Stainless Steel Finishing Insert (10pcs)
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The Original Korloy CNMG090304-HS PC9030 (ANSI Standard: CNMG 321) is a high-precision PVD-coated carbide insert specifically engineered for the finishing of Stainless Steel. Featuring the specialized HS chipbreaker, this insert excels at managing long, stringy chips typically found in austenitic stainless steel (like 304 and 316). The PC9030 grade provides the ultimate toughness and heat resistance required for small-diameter parts where precision and surface integrity are paramount.
Finishing Expert: The HS chipbreaker is designed with a sharp cutting edge and narrow rake, ensuring low cutting forces and preventing work hardening in delicate finishing passes.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG090304-HS |
| ANSI Code | CNMG 321 |
| Grade | PC9030 (Premium PVD for Stainless Steel) |
| Nose Radius | 0.4 mm (1/64") - Precision Finishing |
Core Performance Benefits:
- Superior Surface Finish: The R0.4 nose radius combined with the sharp HS geometry minimizes vibration, delivering a mirror-like finish.
- PVD Nano-Coating: The PC9030 grade offers excellent oxidation resistance and prevents built-up edge (BUE) in "gummy" materials.
- Excellent Chip Control: HS breaker is highly effective at light depths of cut, ensuring chips break cleanly to protect the workpiece surface.
- Precision Dimensions: High repeatability and low wear rate allow for consistent part sizing across long production runs.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Austenitic (304/316) | 120 - 220 m/min | 0.05 - 0.20 mm/rev | 0.2 - 2.0 mm |
| Super Alloys (Inconel/Titanium) | 30 - 70 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.5 mm |
Compatible Tool Holders:
For precision finishing, ensure your holder is in top condition. Recommended tool holders for CNMG 0903 inserts:
- External Turning: PCLNR/L 1616H09 / PCLNR/L 2020K09
- Internal Boring Bars: S16R-PCLNR09 / S20S-PCLNR09
Machinist's Tip: PC9030 vs. PC5300 for Finishing
Choosing the right PVD grade for small parts:
The Stainless Specialist. Best for preventing chemical wear and sticking in high-nickel materials. First choice for high-precision finishing.
The Versatile All-Rounder. Good if you need one insert for both steel and stainless, but lacks the extreme anti-BUE properties of PC9030.
Pro Tip: For the best results in 316 Stainless, use high-pressure coolant directed at the HS chipbreaker to clear chips instantly and protect the R0.4 radius.
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.