Korloy TCMT16T308-HMP NC3120 Durable Universal Steel Turning Insert (10pcs)
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The Original Korloy TCMT16T308-HMP NC3120 is a robust, Universal Triangular Turning Insert designed for maximum reliability across a wide variety of Steel and Alloy Steel applications. Featuring a reinforced 0.8mm corner radius and the versatile NC3120 CVD Grade, this insert excels in both continuous and light interrupted cuts. It is the perfect "go-to" tool for large-diameter parts where balancing tool life and material removal rate is essential.
The Strength of R0.8: The 0.8mm corner radius offers superior edge security compared to smaller radii. It allows for higher feed rates (fn) and provides better heat dissipation, making it ideal for semi-roughing to finishing of large industrial steel components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T308-HMP |
| Corner Radius (r) | 0.8 mm (Reinforced Edge) |
| Grade | NC3120 (Universal CVD Multi-layer Coating) |
| Chipbreaker | HMP (High-Efficiency Medium Finish) |
Core Performance Benefits:
- Unmatched Versatility: NC3120 is engineered to handle P15 to P35 steel groups, making it the most cost-effective solution for diverse production environments.
- Advanced CVD Technology: The coating is optimized for high adhesion resistance, preventing the "peeling" often seen during medium-speed steel turning.
- HMP High-Speed Geometry: Provides excellent chip curling, preventing chip entanglement during deep internal boring or long external passes.
- Balanced Performance: Offers the wear resistance of a harder grade with the impact toughness needed for real-world workshop conditions.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045 / 45#) | 180 - 320 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.0 mm |
| Alloy Steel (4140 / 42CrMo) | 150 - 280 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Low Carbon Steel (A36) | 200 - 350 m/min | 0.20 - 0.45 mm/rev | 1.0 - 4.5 mm |
Compatible Tooling Systems:
Pairs with standard 16-size triangular holders for maximum stability:
- External Turning Toolholders: STGCR 2020K16 / STGCR 2525M16
- Internal Boring Bars: S25S-STUCR16 / S32T-STUCR16
Machinist Tip: The Efficiency Specialist
Why TCMT16T308 NC3120 is a workshop favorite:
Stable & Reliable. If you don't have time to fine-tune every setup, NC3120 is your best bet. It provides a massive window of success across various steel alloys and machine rigidities.
Higher Feed Rates. Because of the larger radius, you can push the feed harder than with a 0.4 radius without sacrificing tool life. This makes it the champion for reducing cycle times on large parts.
Pro Advice: When using the 16T308 for internal boring, ensure you have sufficient clearance for the 0.8mm radius. For the best surface finish, keep your feed rate (fn) at approximately 1/3 of the corner radius.
Packaging: 10 pieces per box.
Korloy TCMT16T308-HMP performance data, NC3120 vs NC3030 for steel machining, best universal turning insert for 1045 steel, TCMT16T308 high feed rate parameters, long life steel boring inserts
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.