Korloy TCMT16T304-HMP NC3030 Heavy Interrupted Steel Turning Insert (10pcs)
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The Original Korloy TCMT16T304-HMP NC3030 is a heavy-duty, ultra-tough Triangular Indexable Insert engineered for the most demanding Steel Turning applications. Designed for larger workpieces, the 16mm edge length combined with the NC3030 CVD Grade provides unparalleled impact resistance. This insert is specifically built to excel where others fail: interrupted cuts, heavy scale, and non-rigid setups on Carbon, Alloy, and Cast Steels.
The "Safety First" Choice: When machining large components with cross-holes, splines, or rough surfaces, tool failure is costly. NC3030 is Korloy's toughest steel grade, offering a massive safety margin against edge chipping and sudden breakage during heavy industrial cycles.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T304-HMP |
| Corner Radius (r) | 0.4 mm (Precision Finishing) |
| Grade | NC3030 (Ultra-Tough CVD Coating) |
| Insert Thickness | 3.97 mm |
Core Performance Benefits:
- Shock Absorption: The specialized substrate is optimized to absorb mechanical shocks, making it the best choice for interrupted cuts (P25-P40 range).
- HMP Geometry Advantage: The "HMP" chipbreaker is a medium-finishing specialist that reduces cutting forces while maintaining stable chip breakage across varying depths of cut.
- Superior Thermal Resistance: Multi-layer CVD coating protects the insert during dry machining or when cooling is inconsistent.
- Reliability in Large Bores: Ideal for large-diameter internal boring where tool deflection can lead to vibration and edge wear.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Standard Steel (1045 / A36) | 140 - 280 m/min | 0.12 - 0.35 mm/rev | 0.5 - 4.0 mm |
| Alloy Steel (4140 / 5140) | 120 - 220 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Cast Steel / Interrupted | 80 - 180 m/min | 0.15 - 0.35 mm/rev | 0.8 - 4.0 mm |
Compatible Tooling Systems:
Precision matched for heavy-duty 16-size holders:
- External Turning: STGCR 2020K16 / STGCR 2525M16
- Internal Boring: S25S-STUCR16 / S32T-STUCR16
Machinist Tip: The "Insurance" Grade
Optimizing your large-scale steel turning with NC3030:
Best for Reliability. Use this when the cutting is rough. It prevents chipping during interrupted cuts or when machining through welded seams. It is more forgiving on older machines with less rigidity.
Best for Efficiency. If you have a clean, continuous cut and a rigid CNC, switch to NC3020 to increase your RPM and maximize tool life against gradual wear.
Pro Advice: For heavy boring using TCMT16, ensure your S32T-STUCR16 bar is as rigid as possible. If you encounter chatter, NC3030's toughness helps protect the edge, but reducing the depth of cut is always recommended to save the machine spindle.
Packaging: 10 pieces per box.
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