Korloy SCMT120408-HMP NC3030 Tough Steel Turning Insert 0.8mm (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SCMT120408-HMP NC3030 is a heavy-duty Square (7° Positive) Turning Insert, specifically engineered for the most demanding Steel (P-Group) machining conditions. Featuring the NC3030 CVD Grade, this insert is the industry standard for Interrupted Cuts, where impact resistance is more critical than pure speed. The 0.8mm Corner Radius provides substantial edge strength, while the -HMP (Highly Medium Performer) geometry ensures consistent chip control across semi-finishing and light-roughing operations.
Built for Stability: NC3030 is designed to prevent catastrophic edge failure. If your machining setup involves vibration, long overhangs, or workpieces with uneven surfaces (like forged parts or hex bars), the SCMT120408-HMP NC3030 provides the ultimate "insurance policy" against chipping.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT120408-HMP |
| Corner Radius | 0.8 mm (Maximum Edge Strength) |
| Inscribed Circle (IC) | 12.7 mm |
| Grade | NC3030 (Ultra-Tough CVD for Steel) |
Core Performance Benefits:
- Shock-Resistant CVD Grade: NC3030 features a specialized substrate that absorbs impact, preventing crack propagation in interrupted cuts.
- 0.8mm Radius Advantage: Enables higher feed rates and significantly increases the tool's resistance to heat and pressure.
- Precision HMP Geometry: Wave-shaped chipbreaker provides crisp, clean chips in the medium depth-of-cut range (1.0mm - 4.0mm).
- Large IC Rigidity: The SCMT1204 size is perfect for high-power lathes and large-scale manufacturing.
Recommended Cutting Parameters (Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 140 - 280 m/min | 0.20 - 0.45 mm/rev | 1.0 - 5.0 mm |
| Alloy Steel (4140/SCM440) | 120 - 240 m/min | 0.15 - 0.35 mm/rev | 1.0 - 4.5 mm |
| Forged Steel / Scaly surface | 100 - 200 m/min | 0.18 - 0.40 mm/rev | 1.5 - 4.5 mm |
Compatible Tool Holders:
Precision fit for heavy-duty 12.7mm IC tool pockets:
- External Turning: SSDC 2525 / 3232 / 4040 Series
- Internal Boring: S32T-SSDC12 / S40U-SSDC12 / S50V-SSDC12
Machinist Tip: Choosing NC3030 for Heavy Work
When to select the "Toughness Expert" over the "Speed Expert":
Interrupted Cut King. Use this for parts with splines, cross-holes, or when turning the raw outer skin of forged bars. It trades a bit of speed for massive reliability.
Continuous Cut King. Better for smooth turning of clean bar stock. It offers more wear resistance at high RPMs but is more likely to shatter during impact.
Pro Advice: For the SCMT120408-HMP NC3030, if you notice the tool is pushing or vibrating, check your feed rate ($fn$). With a 0.8mm radius, the feed should be robust (above 0.25mm) to ensure the chip is thick enough to break cleanly on the HMP breaker.
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.