Korloy TPGH090202L-CRT CN2000 Cermet Finishing Insert for Precision Lathe (10pcs)
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The Original Korloy TPGH090202L-CRT CN2000 is an elite Cermet Turning Insert engineered for Ultra-High Precision Finishing. Utilizing the advanced CN2000 Grade, this insert offers the chemical stability required to prevent built-up edge (BUE), ensuring a flawless, mirror-like surface finish. The CRT chipbreaker is specifically optimized for very light depths of cut, making it the perfect tool for Swiss-type CNC lathes and high-accuracy micro-machining.
Cermet Precision: The CN2000 grade (Ceramic + Metal) provides superior resistance to plastic deformation and oxidation compared to standard carbide. This ensures that the critical 0.2mm corner radius maintains its sharp profile over long production runs, providing excellent dimensional repeatability.
Technical Specifications:
| ISO Designation | TPGH 090202L-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) | 0.2 mm / (0.008") |
| Grade | CN2000 (Mirror Finish Cermet) |
Core Performance Benefits:
- Mirror Surface Finish: Specifically designed to achieve extremely low Ra values on steel and alloy steel.
- Low Cutting Resistance: The CRT geometry reduces tool pressure, preventing deflection on thin-walled or small-diameter workpieces.
- Exceptional Heat Resistance: Maintains edge sharpness at high surface speeds where conventional carbide would soften.
- Anti-Welding Properties: Cermet's low affinity to metal prevents material sticking, ensuring consistent part quality.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Mild Steel / Carbon Steel | 150-380 m/min | 0.03-0.12 mm/rev | 0.05-0.5 mm |
| Alloy Steel (e.g., 4140) | 120-300 m/min | 0.03-0.10 mm/rev | 0.05-0.4 mm |
Compatible Tool Holders:
Optimized for use with standard 09-size triangular tool holders:
- External Swiss-Type Holders: STGCR 1212H09 / STGCR 1616H09
- Internal Precision Boring Bars: S10K-STUPR09 / S12M-STUPR09
Machinist Tip: Mastering Micro-Finishing
Optimizing your TPGH 09-series setup:
Cermet is highly effective for dry machining steel. However, it is sensitive to thermal shock. If you use coolant, ensure it is a constant, high-volume flow to prevent micro-cracking of the edge.
This ultra-small radius provides maximum precision but is delicate. Always ensure your machine spindle is balanced and your setup is rigid to avoid "chipping" the tip upon entry.
Pro Advice: If you find the surface finish is "cloudy" or dull, increase your cutting speed (Vc). Cermet requires a certain level of heat to flow through the material effectively and produce a high-gloss finish.
Packaging: 10 pieces per box.
TPGH 090202L for mirror finish, Swiss type lathe precision inserts, Korloy CN2000 cermet properties, precision turning for small diameter parts, CRT chipbreaker for fine finishing