Korloy SCMT09T304-C25 NC3120 CVD Coated Steel Turning Insert (10pcs)
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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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