Korloy TCMT16T304-HMP NC3120 Universal Steel Turning Insert (10pcs)
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The Original Korloy TCMT16T304-HMP NC3120 is a high-performance Triangular Indexable Insert engineered for the widest range of Steel Turning applications. By utilizing the NC3120 "Universal" CVD Grade, this insert offers a balanced solution that resists both wear and chipping. The HMP (Medium-Finishing) Chipbreaker features a sharp cutting edge and an optimized rake angle, making it the perfect choice for shops that need one insert to handle multiple steel types and cutting conditions.
The All-Rounder: NC3120 is designed to be the most versatile steel grade in your toolbox. It performs exceptionally well in continuous cuts like its sibling NC3020, but with the added toughness to survive the light interruptions that often occur in general job shop environments.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T304-HMP |
| Corner Radius (r) | 0.4 mm |
| Grade | NC3120 (Universal CVD Steel Grade) |
| Insert Side Length | 16.5 mm |
Core Performance Benefits:
- Broad Application Range: One insert for various carbon and alloy steels (P15 - P35), reducing inventory costs.
- Optimized CVD Coating: Features high adhesion resistance and thermal stability for consistent tool life even at increased speeds.
- Excellent Surface Finish: The HMP geometry minimizes cutting pressure, delivering a superior finish on large-diameter workpieces.
- Stability in Large Boring: The 16mm size provides the rigidity needed for deep internal boring operations.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018/1045) | 180 - 320 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.5 mm |
| Alloy Steel (4140/5140) | 150 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Mild Steel (General A36) | 200 - 350 m/min | 0.12 - 0.35 mm/rev | 0.8 - 4.0 mm |
Compatible Tooling Systems:
Pairs with heavy-duty 16-size triangular toolholders:
- External Turning Toolholders: STGCR 2020K16 / STGCR 2525M16
- Internal Boring Bars: S25S-STUCR16 / S32T-STUCR16
Machinist Tip: The "Swiss Army Knife" of Inserts
How NC3120 fits into your production cycle:
The Goldilocks Grade. Not too hard, not too soft. Use this when your daily work varies between smooth shafts and slightly rough or square stock. It’s the most forgiving grade for general machining.
The Specialists. Choose NC3020 for strictly high-speed, continuous CNC work. Choose NC3030 only for heavy impact, interrupted cuts, or very poor machine rigidity.
Pro Advice: For large-diameter boring with the 16mm TCMT, always ensure your chipbreaker is clear. The HMP geometry is great, but in deep holes, high-pressure coolant is your best friend to prevent chip re-cutting.
Packaging: 10 pieces per box.
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