120 W Skived Fin Heat Sink

The fins are skived out of one solid aluminum billet — no bonding layer, no interface between base and fin. Heat travels through a single continuous path of aluminum, which is why skived heat sinks still dominate high power density equipment.

How it is built

Base plate and fins are one piece. At the fin root the metal is continuous, so interface resistance is low. A 2 mm fin pitch with 25 mm fin height gives an effective convection channel under a standard 40 mm fan. Base thickness follows the mounting stud depth on your drawing.

What we can change

Fin pitch, fin height, base thickness, hole pattern, milled slots and counterbores are all drawing-driven. Surface finish can be anodized, sandblasted, brushed or chromate conversion coated. For prototypes we suggest 3-5 pieces first to check assembly and airflow before fixing the production process.

Process notes

Fins are skived from a solid billet on a CNC skiving machine, leaving a continuous root with no weld line. Parts are then deburred, cleaned, milled to the hole pattern and counterbores, and finished. Tighter fin pitch demands higher machine rigidity and better coolant control.

Applications

Switching power supplies, PV inverters, energy storage PCS, industrial control boards, servo drives, LED drivers.