Korloy TPGH090204L-CRT PC5300 (R0.4) PVD Carbide Insert for Stainless Finishing (10pcs)
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The Original Korloy TPGH090204L-CRT PC5300 (ANSI: TPGH 21.51L-CRT) is a premium PVD Coated Turning Insert engineered for Stable Precision Finishing. Powered by the PC5300 Universal Grade, this insert is designed to master the challenges of Stainless Steel (M), Super Alloys (S), and High-Strength Steels (P). The 0.4mm (1/64") radius provides excellent edge security, making it the industry standard for Swiss-type CNC lathes and high-accuracy internal boring where tool life consistency is critical.
The PVD Powerhouse: PC5300 features a specialized sub-micron substrate and a multi-layered TiAlN coating. This combination offers high thermal stability and superior resistance to built-up edge (BUE), which is essential for maintaining Ra surface quality on gummy materials like 316 stainless steel.
Technical Specifications (Metric & Imperial):
| ISO Designation | TPGH 090204L-CRT |
| ANSI Designation | TPGH 21.51L-CRT |
| Inscribed Circle (IC) | 5.56 mm / (7/32") |
| Thickness (S) | 2.38 mm / (3/32") |
| Corner Radius (r) | 0.4 mm / (0.016") |
| Grade | PC5300 (Universal PVD Specialist) |
Core Performance Benefits:
- Exceptional Edge Toughness: The 0.4mm radius is more durable than 0.2mm, allowing for higher feed rates and stable cutting even in slightly interrupted passes.
- Reduced Friction: Advanced PVD layer prevents material from welding to the insert, ensuring a bright, clean surface finish.
- Precision CRT Geometry: Sharp cutting edge reduces cutting pressure, preventing deflection on thin parts and small diameters.
- Broad Application Range: One grade handles Stainless, Titanium, and Alloy Steel—reducing your tool inventory costs.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (304/316) | 90-180 m/min | 0.05-0.15 mm/rev | 0.10-0.6 mm |
| Alloy Steel / 4140 | 120-220 m/min | 0.05-0.18 mm/rev | 0.10-0.7 mm |
| Titanium Alloys | 40-80 m/min | 0.04-0.12 mm/rev | 0.10-0.5 mm |
Compatible Tool Holders:
Compatible with all standard 09-size triangular tool holders:
- External Turning Tool: STGCR 1212H09 / STGCR 1616H09
- Precision Boring Bars: S10K-STUPR09 / S12M-STUPR09
Machinist Tip: PC5300 vs. PC9030
Choosing the right PVD grade for Stainless Steel:
The Finishing Expert. Optimized for high-speed finishing where edge sharpness and Ra surface quality are the priority. It offers better wear resistance across a broader range of steel alloys.
The Interruption Specialist. Best for medium cutting and heavy interrupted cuts in stainless. It has a tougher substrate but slightly less wear resistance in continuous cutting than PC5300.
Pro Advice: If you find the chip is long and "stringy," try increasing your depth of cut (ap) slightly or increasing the feed rate (fn) to engage the CRT chipbreaker more effectively.
Packaging: 10 pieces per box.
TPGH 090204L for 304 stainless steel, Korloy PC5300 turning speed and feed, precision inserts for 17-4PH stainless, Swiss lathe tool for tough alloy steel, TPGH 21.51L-CRT cross reference