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.
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