Korloy TCMT16T308-HMP NC3020 Heavy Duty Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy TCMT16T308-HMP NC3020 is a heavy-duty Triangular Indexable Turning Insert engineered for maximum material removal in Carbon Steel, Alloy Steel, and Cast Steel. Featuring a robust 16mm edge length and a reinforced 0.8mm corner radius, this insert is designed to handle aggressive feed rates and deeper cuts. The NC3020 CVD Grade provides a thick, heat-resistant barrier, making it the perfect choice for high-speed industrial production.
Built for Heavy Removal: The 0.8mm (R0.8) radius provides significantly more edge strength than the 0.4mm version. This allows for higher feed rates and better heat dissipation, making it indispensable for large-scale turning where reducing cycle time is critical.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T308-HMP |
| Corner Radius (r) | 0.8 mm (Heavy Duty) |
| Grade | NC3020 (CVD Multi-layer Coated) |
| Thickness | 3.97 mm |
Core Performance Benefits:
- Enhanced Edge Security: The R0.8 radius resists chipping under heavy loads and interrupted cuts better than any other TCMT specification.
- HMP High-Efficiency Geometry: Specially designed to control chips at larger depths of cut, ensuring they break cleanly and don't wrap around the workpiece.
- Superior Wear Resistance: The Al2O3 CVD coating enables high-speed dry or wet machining, maintaining dimensional accuracy over long runs.
- Reduced Tool Cost: Large 16mm insert size provides more thermal stability, leading to longer tool life and fewer insert changes.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018/1045) | 200 - 380 m/min | 0.15 - 0.45 mm/rev | 1.0 - 4.5 mm |
| Alloy Steel (4140/SCM440) | 160 - 320 m/min | 0.15 - 0.40 mm/rev | 0.8 - 3.5 mm |
| Hot Rolled Steel | 140 - 280 m/min | 0.18 - 0.42 mm/rev | 1.0 - 5.0 mm |
Compatible Tooling Systems:
Pairs perfectly with large-scale 16-size triangular holders:
- External Turning Toolholders: STGCR 2020K16 / STGCR 2525M16
- Internal Boring Bars: S25S-STUCR16 / S32T-STUCR16
Machinist Tip: Strength vs. Precision
When to choose the R0.8 (TCMT16T308) over the R0.4:
Best for Productivity. The larger radius allows for much higher feed rates. Use this for your first passes (semi-roughing) or for large parts where the final surface finish requirement is standard.
Best for Fine Detail. Switch back to the 0.4 radius only if you have stability issues (vibration) or need to turn up to a sharp 90-degree shoulder with minimal clearance.
Pro Advice: Large radius inserts like the 16T308 generate more radial pressure. Ensure your S25S-STUCR16 boring bar is properly clamped and use a rigid machine setup to unlock the full high-feed potential of NC3020.
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.