Korloy SCMT09T304-HMP NC3020 Steel Semi-Finishing Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SCMT09T304-HMP NC3020 is a high-efficiency Square (7° Positive) Turning Insert, meticulously engineered for Steel (P-Group) machining. Featuring the high-speed NC3020 CVD Coating, this insert offers exceptional heat resistance and a high-hardness surface to combat crater wear. The -HMP (Highly Medium Performer) chipbreaker is the star of this model, specifically designed to provide excellent chip breaking at medium feed rates and depths of cut, ensuring a superior surface finish and consistent dimensional control.
Optimized for Productivity: The NC3020 grade is a staple in high-volume CNC shops. Its multi-layered CVD technology acts as a thermal shield, allowing for faster spindle speeds (Vc) in carbon and alloy steels, while the HMP geometry prevents long, stringy chips from marring your workpiece.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SCMT09T304-HMP |
| Shape / Angle | Square / 7° Positive |
| Thickness / Corner Radius | 3.97 mm / 0.4 mm |
| Grade | NC3020 (Premium CVD for Steel) |
Core Performance Benefits:
- HMP Geometry: Features a specialized wave-shaped rake face that controls chips effectively across a wide range of medium-duty operations.
- High-Speed CVD Coating: Thick TiCN + Al2O3 layers provide maximum protection against thermal deformation during continuous high-speed turning.
- Reduced Cutting Forces: The positive geometry reduces the load on the machine spindle, ideal for small to medium-sized lathes.
- Versatile Application: Perfect for external turning, facing, and internal boring of various steel grades.
Recommended Cutting Parameters (Steel):
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel | 180 - 350 m/min | 0.12 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Alloy Steel (4140/SCM440) | 150 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Mild Steel (A36/S235) | 200 - 380 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.0 mm |
Compatible Tool Holders:
Precision fit for standard 9.525mm IC tool pockets:
- External Holders: SSDC 1212 / 1616 / 2020 Series
- Internal Boring Bars: S12M-SSDC09 / S16Q-SSDC09 / S20R-SSDC09
Machinist Tip: NC3020 vs NC3120
Choosing the right steel grade for your SCMT inserts:
Balanced Performance. This grade is optimized for continuous cutting at high speeds. It offers a great balance of toughness and hardness for a wide variety of carbon steels.
Roughing Specialist. Use NC3120 for heavier, interrupted cuts. It has slightly more toughness (impact resistance) than NC3020, making it better for raw stock with scaly surfaces.
Pro Advice: For the SCMT09T304-HMP, ensure your finishing pass depth of cut (ap) is not smaller than 0.4mm (the corner radius). This ensures the HMP chipbreaker engages properly to prevent birds-nesting.
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.