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Ultra-High Density Aluminum Micro-Fin Rolling Blade (50 FPI)
Precision micro-finning blades for high-density aluminum tube production, optimized for compact heat exchangers and automotive cooling.
- Fin Density Capability:
- 32 to 60 FPI (Ultra-High Density Micro-Fin)
- Applicable Standards:
- ASTM B221, ASTM B234, ASTM A1012 / ASME SA1012, DIN 28180
- Material Compatibility:
- Soft & Half-Hard Al 1060, 1100, 3003, 3103, 6063
- Blade Material Grade:
- Sub-Micron Ultrafine Grain Tungsten Carbide / DLC-Coated HSS
- Edge Precision & Finish:
- ±0.003mm (±0.00012" Sub-Micron Tolerance) | Ra < 0.05 μm
- Surface Coating:
- Diamond-Like Carbon (DLC) / TiAlN PVD Anti-Adhesion 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
High-Precision Micro-Forming
Achieving a density of 50 FPI requires extreme precision in blade alignment and profile geometry. Nexmek's micro-fin blades are designed with a unique low-drag flank angle that facilitates the flow of aluminum during the rolling process, ensuring sharp, uniform fin tips and consistent root spacing.
- Advanced CNC profile grinding for 0.003mm (±0.00012") profile accuracy
- Optimized for 1060, 1100, and 3003 series soft aluminum alloys
- Prevents tube deformation in high-density sequences compliant with ASTM B234
Fin Density & Capacity Standards
Our tooling supports a wide range of micro-fin configurations for various industrial requirements.
| Density (FPI) | Fin Pitch (Metric & Imperial) | Application Profile | Target Industry & Standard |
|---|---|---|---|
| 32 FPI | 0.79mm (0.031") | Residential Heat Pump & AC | HVAC-R (ASTM B280) |
| 40 FPI | 0.63mm (0.025") | Commercial Chiller & Condenser | Industrial Air Cooling |
| 50 FPI | 0.50mm (0.020") | Compact Micro-Channel Evaporator | Automotive / EV Battery Cooling |
| 60 FPI | 0.42mm (0.0165") | Precision Cryogenics & Avionics | Aerospace (ASTM B221) |
Maintaining Tube Structural Integrity
High-density finning can often stress the base material of the tube. Our micro-fin blades are engineered to balance the radial load, ensuring that even when forming 50 fins per inch, the internal wall thickness remains within specification. This is critical for systems using modern high-pressure refrigerants or for aerospace components where reliability is paramount.