Korloy SCMT09T304-C25 NC3120 CVD Coated Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SCMT09T304-C25 NC3120 is a high-durability Square ($7^\circ$ Positive) Turning Insert, engineered for stable performance in Steel (P-Group) machining. Featuring the high-performance NC3120 CVD Grade, this insert offers a thick coating layer that provides exceptional heat and wear resistance. The -C25 Chipbreaker is specifically designed for medium to rough cutting, ensuring smooth chip evacuation even in high-feed applications on carbon and alloy steels.
Built for Steel Production: NC3120 is the go-to grade for machinists facing demanding production cycles. Its multi-layer CVD coating acts as a thermal barrier, allowing for higher cutting speeds while the -C25 geometry maintains stable chip control in wide-ranging depths of cut.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT09T304-C25 |
| Inscribed Circle (IC) | 9.525 mm |
| Thickness / Corner Radius | 3.97 mm / 0.4 mm |
| Grade | NC3120 (Premium CVD for Steel) |
Core Performance Benefits:
- Enhanced Wear Resistance: Thick Al2O3 + TiCN coating provides a shield against crater and flank wear during high-speed turning.
- Stable Chip Control: The -C25 geometry is optimized for medium-range depths of cut, preventing "birds-nesting" of chips in steel.
- Tough Substrate: Specifically formulated to resist chipping and thermal cracking in continuous and slightly interrupted cuts.
- Extended Tool Life: NC3120 grade is designed to reduce production costs by maximizing edges per part.
Recommended Cutting Parameters (Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 150 - 300 m/min | 0.10 - 0.35 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (SCM440) | 120 - 250 m/min | 0.08 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Cast Steel | 100 - 220 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.0 mm |
Compatible Tool Holders:
Precision fit for $90^\circ$ approach turning and boring operations:
- External Turning Holders: SSDC 1212 / 1616 / 2020 / 2525 Series
- Internal Boring Bars: S12M-SSDC09 / S16Q-SSDC09 / S20R-SSDC09
Machinist Tip: Choosing NC3120 vs. PC5300
Grade selection is vital for maximizing your SCMT09 inserts:
Best for Steel Production. As a CVD grade, it excels at higher speeds and continuous dry cutting. It has a much thicker coating for superior life in high-heat steel applications.
Best for Mixed Materials. If you switch between Steel and Stainless regularly, or have heavy vibrations, the PVD toughness of PC5300 is better. But for pure Steel efficiency, NC3120 wins.
Pro Advice: When using the SCMT09T304-C25 NC3120, the -C25 geometry prefers a depth of cut ($ap$) at least twice the corner radius ($0.4mm \times 2 = 0.8mm$) for optimal chip breaking.
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.