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Ultra-High Density Micro-Fin Copper Tube Rolling Blade (50 FPI)
Precision micro-finning blades optimized for high-density (up to 50 FPI) copper tube production.
- Fin Density:
- Up to 50 FPI (Fins Per Inch / Micro-Fin)
- Tooling Material Grade:
- Premium Cr12MoV / High-Speed Steel M2 / Tungsten Carbide
- Applicable Standards:
- ASTM / ASME SB359 (C12200, C70600, C71500), B111
- Pitch Precision & Tolerance:
- ±0.005mm (±0.0002") Ground Finish (Ra < 0.2 μm)
- Compatible Tube Material:
- Thin-Walled Soft & Half-Hard Copper (C12200 DHP)
- Coating & Treatment:
- 58-62 HRC Vacuum Treated | Optional TiAlN PVD Coating
Applicable StandardsASTM / ASME B359, SB359, B111, B444, DIN EN 12451
Tooling Material GradesCr12MoV, D2, SKD11, High-Speed Steel M2, Carbide
Precision Tolerance±0.005 mm (±0.0002 in) Ground Finish
Compatible TubingCopper (C70600, C71500), Stainless Steel, Aluminum
Technical Specifications
The Science of High FPI Formation
Forming 40 to 50 fins per inch requires a tool that can maintain its profile under constant vibration and heat. Our micro-fin blades feature a specialized 'low-drag' profile that reduces friction during the cold-forming process, allowing for higher density without compromising the tube's structural integrity.
- Specifically engineered for C12200 Phosphorus-Deoxidized Copper (DHP)
- Uniform heat transfer across the entire tube circumference
- Critical for compact condenser, chiller, and evaporator designs
Fin Density & Capacity Standards
Nexmek provides a range of precision blades to meet the evolving standards of the refrigeration industry.
| Density (FPI) | Pitch (mm / in) | Typical Application | Fin Height (mm / in) |
|---|---|---|---|
| 26 FPI | 0.97mm (0.038") | Standard HVAC Coils | 1.0 - 1.5mm (0.04" - 0.06") |
| 32 FPI | 0.79mm (0.031") | High-Efficiency AC | 0.8 - 1.2mm (0.03" - 0.05") |
| 40 FPI | 0.63mm (0.025") | Precision Refrigeration | 0.6 - 1.0mm (0.02" - 0.04") |
| 50 FPI | 0.50mm (0.020") | Ultra-Compact Chillers | 0.4 - 0.8mm (0.016" - 0.031") |
Edge Stability & Material Excellence
To maintain a 0.50mm pitch, the blade material must be exceptionally stable. We use ultra-fine grain tool steels and specialized vacuum heat treatment to ensure that our blades do not deflect or wear prematurely, even when running at 2,000+ RPM in continuous finning lines.