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Heavy-Duty High-Fin Aluminum Tube Rolling Blade
Robust rolling blades for high-profile integral aluminum fin production, engineered for maximum surface area and thermal efficiency.
- Fin Profile Capability:
- High-Fin Integral & Bimetallic Extrusion
- Applicable Standards:
- ASTM B221, ASTM A1012 / ASME SA1012, DIN 28180
- Fin Height Capability:
- 8.0mm - 15.0mm (0.315" - 0.590" High-Fin)
- Blade Metallurgy:
- High-Chrome Cr12MoV / Vanadium HSS M2 / Carbide Inserts
- Surface Coating & Finish:
- Anti-Galling Mirror Polish (Ra < 0.10 μm) | TiN / TiAlN PVD Coating
- Process Method:
- Three-Roll Oblique Cold Rolling (Zero Air-Gap)
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
Progressive Extrusion Technology
The production of high-profile fins from a solid aluminum wall requires a carefully managed multi-stage extrusion process. Nexmek blades are profile-calibrated to distribute rolling forces evenly, preventing material tearing and ensuring a smooth, mirror-like finish on the fin flanks.
- Synchronized multi-blade rolling sequence for Al 1060, 1100, and 6063 alloys
- Precision tip shaping for aerodynamic efficiency and low air-drag
- Maintains critical base-wall thickness during extrusion compliant with ASTM A1012
High-Fin vs. Standard Performance
High-fin aluminum tubes are specifically designed to overcome the low heat transfer coefficients of the air-side in gas-to-liquid exchangers.
| Specification | Standard Low-Fin (ASTM A1012) | Nexmek High-Fin Series |
|---|---|---|
| Typical Fin Height | 1.5mm - 2.5mm (0.06" - 0.10") | 8.0mm - 15.0mm (0.315" - 0.590") |
| Surface Area Ratio | 3x - 5x Baseline | Up to 15x+ Effective Area |
| Typical Fin Pitch | 26 - 50 FPI | 7 - 12 FPI (Fins Per Inch) |
| Cooling Efficiency & Focus | Standard Liquid-Side Focus | Extra High Air-Side Focus (ACC / ACHE) |
Maximized Thermal Conductivity
By eliminating the air gap found in wrapped or tension-wound fins, our rolled high-fin technology provides a continuous metallurgical path. This ensures 100% thermal contact throughout the life of the heat exchanger, making it the preferred choice for dry coolers, air-cooled condensers (ACC), and industrial cooling towers.