K-Fin (Knurled Fin)
The K-Fin is essentially an enhanced version of the L-Fin, designed to improve its limitations without the cost of a G-Fin.
- Manufacturing Process: The base tube is first knurled (a process that creates a rough, patterned surface). An L-footed fin strip is then wound onto this knurled surface under tension, just like a standard L-fin.
- How it Attaches: The fin’s “L” foot is forced into the knurled pattern on the tube. This creates a combination of tension and a mechanical interlock between the fin foot and the roughened tube surface.
- Advantages:
- Better Bond than L-Fin: The knurling prevents the fin from rotating or loosening as easily, offering improved resistance to vibration and thermal cycling.
- Better Heat Transfer: The knurling increases the contact area between the fin and the tube, reducing thermal contact resistance.
- Cost-Effective Upgrade: It is more expensive than a plain L-fin but cheaper than a G-fin.