Korloy SCMT120408-HMP NC3020 0.8mm Radius Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SCMT120408-HMP NC3020 is a powerful Square (7° Positive) Turning Insert, engineered for high-performance Steel (P-Group) machining. Featuring a robust 0.8mm Corner Radius, this insert provides superior edge strength, allowing for aggressive feed rates without risking edge chipping. The NC3020 CVD Grade ensures maximum wear resistance during high-speed continuous cutting, while the -HMP (Highly Medium Performer) chipbreaker is designed for perfect chip control in semi-finishing to light-roughing applications.
Maximum Efficiency: The 0.8mm radius on the SCMT120408 is ideal for machinists looking to reduce cycle times. It allows for a significantly higher feed rate compared to the 0.4mm version, making it the workhorse for large-diameter shaft turning and heavy-duty boring.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT120408-HMP |
| Corner Radius | 0.8 mm (Increased Edge Stability) |
| Thickness / IC | 4.76 mm / 12.7 mm |
| Grade | NC3020 (CVD Optimized for Steel) |
Core Performance Benefits:
- Durable 0.8mm Edge: Excellent at resisting the impact of slightly interrupted cuts or surface scale in raw steel stock.
- High-Speed Stability: The thick TiCN + Al2O3 coating layers allow for high cutting speeds (Vc), increasing your hourly output.
- HMP Chip Control: Specifically designed to "curl and snap" chips in the medium depth-of-cut range, preventing bird-nesting on the workpiece.
- Reduced Tool Cost: Long-lasting grade performance translates to more finished parts per cutting edge.
Recommended Cutting Parameters (Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 180 - 350 m/min | 0.20 - 0.50 mm/rev | 1.0 - 5.0 mm |
| Alloy Steel (4140) | 150 - 280 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.5 mm |
| Mild Steel (A36) | 200 - 380 m/min | 0.25 - 0.55 mm/rev | 1.5 - 5.0 mm |
Compatible Tool Holders:
Fits all standard ISO holders with a 12.7mm square pocket:
- External Turning: SSDC 2525 / 3232 / 4040 Series
- Internal Boring: S32T-SSDC12 / S40U-SSDC12 / S50V-SSDC12
Machinist Tip: The Advantage of 0.8mm Radius
Optimizing your SCMT120408-HMP performance:
Stronger & Faster. The 0.8mm corner radius is the professional choice for bulk material removal in semi-finishing. It allows you to double the feed rate compared to a 0.4mm radius while maintaining the same surface roughness.
Precision Control. Choose the HMP chipbreaker when you need a balance between material removal and surface quality. If your steel is causing long, stringy chips with a standard breaker, the HMP will solve the issue.
Pro Advice: When machining with SCMT120408-HMP NC3020, ensure your feed ($fn$) is above 0.25mm/rev to fully engage the chipbreaker geometry. For best results in heavy boring, use a high-pressure coolant to clear the chips from the hole.
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.