Korloy TPGH090204L-CRT CN2000 (R0.4) Mirror Finish Cermet Insert (10pcs)
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The Original Korloy TPGH090204L-CRT CN2000 is a high-performance Cermet Turning Insert engineered for Ultra-Precision Finishing. Featuring the elite CN2000 Cermet Grade, this insert is designed to deliver a mirror-like surface finish by minimizing chemical affinity with the workpiece. The 0.4mm (1/64") corner radius combined with the CRT chipbreaker provides a perfect balance of edge strength and sharp cutting action, making it a favorite for Swiss-type CNC lathes and high-accuracy internal boring.
Why Choose CN2000 Cermet? Cermet grades provide superior oxidation resistance and high thermal stability. Unlike carbide, CN2000 resists "welding" of material to the cutting edge, ensuring that your critical dimensions and surface brightness remain consistent from the first part to the last in a 1,000-piece run.
Technical Specifications:
| ISO Designation | TPGH 090204L-CRT |
| Insert Shape | Triangular 11° Positive (T) |
| Inscribed Circle (IC) | 5.56 mm / (7/32") |
| Thickness (S) | 2.38 mm / (3/32") |
| Corner Radius (r) | 0.4 mm / (0.016") |
| Grade | CN2000 (Mirror Finish Cermet) |
Core Performance Benefits:
- Enhanced Edge Security: The 0.4mm radius is more durable than 0.2mm, allowing for higher feed rates and stable cutting in medium-batch production.
- Exceptional Surface Ra: Achieve Ra < 0.8μm with ease, significantly reducing the need for secondary polishing operations.
- Optimized Chip Control: The CRT geometry is fine-tuned for depths of cut between 0.05mm and 0.6mm, ensuring chips don't wrap around the workpiece.
- High-Speed Efficiency: Performs best at higher cutting speeds (Vc) where standard carbide would wear prematurely due to heat.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 180-400 m/min | 0.05-0.15 mm/rev | 0.10-0.6 mm |
| Alloy Steel (4140) | 150-320 m/min | 0.05-0.12 mm/rev | 0.10-0.5 mm |
Compatible Tool Holders:
Optimized for 09-size triangular tool systems:
- External Tool Holders: STGCR 1212H09 / STGCR 1616H09
- Internal Boring Bars: S10K-STUPR09 / S12M-STUPR09
Machinist Tip: The Cermet Advantage
How to optimize the life of your TPGH 090204L:
CN2000 is a Cermet grade, which is harder but more brittle than carbide. **Avoid interrupted cuts** or scaly outer layers. Use it only for the final finishing pass on clean material.
The 0.4mm (this model) allows for a higher feed rate without sacrificing surface quality, thanks to its larger contact area. Use this for general precision production.
Pro Advice: Cermet thrives on speed. If your finish looks "dull" or "torn," **increase your surface speed (Vc)**. The heat generated at high speeds actually helps the cermet cut more cleanly.
Packaging: 10 pieces per box.
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