Korloy TCMT16T304-HMP NC3020 Steel Turning Insert for Heavy Boring (10pcs)
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The Original Korloy TCMT16T304-HMP NC3020 is a heavy-duty Triangular Indexable Insert built for high-efficiency turning of Carbon Steel, Alloy Steel, and Cast Steel. As a larger 16mm-size insert, it provides the thermal mass and mechanical strength required for larger diameter parts. The NC3020 Grade features a multi-layer CVD coating with a thick Al2O3 layer, providing industry-leading wear resistance at high temperatures, while the HMP Chipbreaker ensures stable chip control in medium-to-finishing operations.
Maximum Productivity for Large Parts: The TCMT16 series is designed for stability. When paired with the NC3020 grade, it allows for high-speed continuous cutting without the risk of rapid plastic deformation, significantly lowering the cost-per-part in mass production.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T304-HMP |
| Corner Radius (r) | 0.4 mm (Precision Finishing) |
| Grade | NC3020 (CVD Coated Steel Grade) |
| Thickness | 3.97 mm |
Core Performance Benefits:
- Superior Thermal Stability: The thick CVD coating protects the carbide substrate from the extreme heat generated during large-diameter steel turning.
- Optimized HMP Chipbreaker: Engineered to eliminate "long chips" by forcing a tight curl, preventing damage to the workpiece surface and machine components.
- High Edge Security: The 16mm edge provides ample contact area and strength for deeper cuts (ap) compared to 09 or 11 sizes.
- Consistent Surface Finish: Maintains Ra values over long production cycles thanks to the specialized substrate that resists crater wear.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 180 - 350 m/min | 0.12 - 0.35 mm/rev | 0.5 - 4.0 mm |
| Alloy Steel (4140) | 150 - 300 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Tool Steel | 100 - 200 m/min | 0.10 - 0.25 mm/rev | 0.4 - 2.5 mm |
Compatible Tooling Systems:
Optimized for heavy-duty 16-size triangular toolholders:
- Large Boring Bars: S20R-STUCR16 / S25S-STUCR16 / S32T-STUCR16
- External Turning Tools: STGCR 2020K16 / STGCR 2525M16
Machinist Tip: Scaling Up to TCMT16
Why the 16T304 NC3020 is the backbone of heavy production:
Best for Speed. If you have a powerful, rigid CNC machine, NC3020 allows you to push higher surface footage (Vc). This is your primary grade for 80% of steel-turning applications.
The Interrupted Specialist. Switch to NC3120 for parts with heavy scale, sand inclusions (castings), or large cross-holes that create impact shocks on the cutting edge.
Pro Advice: Because the TCMT16 has a larger surface area, ensure you are using a toolholder with a high-quality seat/shim. Any movement in the insert during heavy steel cutting will lead to premature failure of the CVD coating.
Packaging: 10 pieces per box.
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