CNC Skiving Fin Heat Sink Machine for Copper & Aluminum
Full-CNC skiving machine for one-piece heat sink production from copper or aluminum blocks. Produces high-density, high-aspect-ratio fins for AI servers, LED lighting, IGBT power modules, and high-end consumer electronics — with zero thermal contact resistance between fin and base.
Product Description
Overview
Modern thermal designs are pushing fin density and fin height to limits that traditional extrusion and bonded-fin processes simply cannot reach. AI server CPUs run hotter and denser than the previous generation. High-power LED modules cram more watts into the same footprint every year. IGBT inverters in EV traction systems push power density that requires copper fins, not aluminum.
The CT-SKV-600 CNC Skiving Fin Heat Sink Machine is built for exactly this kind of demand. It takes a solid block of copper or aluminum, then uses a precision skiving tool to lift and shape successive layers of material into vertical fins — all in one continuous operation, with no joining, no soldering, and no thermal interface between fin and base.
Maximum workpiece size is 600 × 400 × 100 mm. Fin thickness goes down to 0.3 mm on copper; fin height goes up to 80 mm on copper and 100 mm on aluminum. Full CNC control means program-driven changeover between part numbers, not manual tool resetting between batches.
Why Skived Fin Heat Sinks Outperform Other Constructions
A skived fin heat sink starts as a single block of material. The skiving tool plows through the surface at a precise angle, lifting a thin layer of material upward to form a fin, then advances by the programmed fin pitch and repeats. The base and the fins are the same piece of metal at the atomic level. There is no joint, no adhesive, no solder, and no thermal interface material anywhere in the heat flow path.
Compared with the three other common heat sink processes:
| Property | Skived Fin | Extruded Fin | Bonded / Folded Fin |
| Fin and base | One piece (monolithic) | One piece | Two pieces, joined |
| Thermal contact resistance | Zero | Zero | Present (epoxy or solder layer) |
| Maximum aspect ratio | Up to 30:1 | 8:1 to 10:1 | 20:1 to 60:1 |
| Material flexibility | Copper, aluminum | Aluminum only (mostly) | Copper, aluminum |
| Best for | High-density, high-performance cooling | Cost-sensitive, low-density | Very tall fins, lower thermal demand |
For most high-performance air-cooled applications today, skived fin is the optimal balance — it delivers the thermal performance of one-piece construction with fin densities and heights that extrusion cannot match.
Key Features
• Full CNC control — servo drives on X, Y, and Z axes; program-driven changeover; recipes stored by part number
• Works with copper and aluminum — same machine handles C1100 copper, 6063 aluminum, 1050 aluminum, and nickel-plated copper without mechanical conversion
• Fin thickness down to 0.3 mm on copper — the ultra-thin fin range required by AI server CPU and GPU cooling
• Aspect ratio up to 30:1 — far beyond what extrusion can produce, opening up high-density fin designs
• Precision tool-depth control — fin thickness held to ±0.05 mm and fin height to ±0.1 mm across the workpiece
• Built-in cutting fluid system with filtration and recirculation; prevents tool wear and surface roughness issues on copper
• Quick-change tool holder — adjustable limit rod and quick return handle let the operator move to the next cutting depth in seconds
• Touchscreen HMI with parameter input — operators can adjust fin thickness, pitch, and height through simple data entry; no G-code knowledge required for routine operation
• G-code import option for advanced users running custom fin geometries (curved, wavy, or variable-pitch fins)
• One-year warranty, on-site installation and operator training included as standard
Technical Parameters
| Parameter | Value |
| Model | CT-SKV-600 |
| Process type | CNC skiving (one-piece fin and base from solid block) |
| Compatible materials | Copper (C1100, C1020), Aluminum (1050, 1100, 6063), Nickel-plated copper |
| Maximum workpiece size | 600 × 400 × 100 mm (L × W × H) |
| Fin thickness range | 0.3 – 1.5 mm (copper), 0.5 – 2.0 mm (aluminum) |
| Fin pitch range | 1.0 – 5.0 mm (adjustable per program) |
| Maximum fin height | Up to 80 mm (copper), up to 100 mm (aluminum) |
| Maximum fin aspect ratio | Up to 30:1 |
| Fin thickness tolerance | ±0.05 mm |
| Fin height tolerance | ±0.1 mm |
| Control system | Full CNC with HMI touchscreen + servo drives on X/Y/Z axes |
| Program storage | Unlimited recipes (USB / Ethernet / G-code import) |
| Cooling / lubrication | Built-in cutting fluid system with filtration and recirculation |
| Power supply | 380V / 50Hz / 3-phase |
| Total power | 15 kW (main motor) + auxiliary |
| Machine dimensions (L×W×H) | 2800 × 1800 × 2000 mm (typical, configurable) |
| Machine weight | ~ 4500 kg |
| Compliance | CE-ready design |
Applications
AI Server & Data Center CPU/GPU Cooling
Server-level air cooling for AI workloads now demands fin densities that extrusion cannot reach. NVIDIA H100 and similar accelerators dissipate up to 700W per package; CPU sockets above 350W are now common. Copper skived fin heat sinks with 0.3 mm fins and 1.5 mm pitch are widely used as either the primary air cooler or as the air-side stage of a hybrid cooling architecture. For deeper context on why fin geometry matters at this scale, see our notes on thermal management applications.
LED High-Power Lighting
High-bay LEDs, stadium lighting, and automotive headlamps need heat sinks that fit in tight envelopes while dissipating heat reliably for 50,000+ hours. Aluminum skived fins give the best fin density per cubic centimeter — typical designs use 0.5 mm fins at 1.5–2.0 mm pitch.
IGBT & Power Electronics
Inverter and motor controller cold sides increasingly use copper skived heat sinks when air cooling is required. The zero-interface construction matters when the heat flux is high enough that any joint resistance would cause thermal runaway.
Telecom & 5G Equipment
Outdoor 5G radio units and base station amplifiers benefit from skived heat sinks because the one-piece construction handles thermal cycling and mechanical vibration without the joint fatigue issues that plague bonded-fin designs.
Industrial Laser & Medical Equipment
Laser power supplies and medical imaging electronics use copper skived heat sinks where thermal stability matters more than cost.
FAQ
What's the difference between a skived fin and an extruded fin heat sink?
Both are one-piece, so both have zero thermal contact resistance at the fin base. The difference is fin density and aspect ratio. Extrusion is limited by the die geometry — typically maximum aspect ratio of 8:1 to 10:1. Skiving can reach 30:1 or higher because the fins are formed by cutting, not by pushing material through a die. For high-performance applications where you need more fins or taller fins in the same footprint, skived is the right choice.
Can the machine process both copper and aluminum?
Yes, the CT-SKV-600 handles both. The recipe stores different cutting parameters for each material — copper needs slower feed rate, steeper tool angle, and more aggressive cooling than aluminum. Switching between materials is a recipe change, not a mechanical conversion.
What's the minimum fin thickness the machine can produce?
0.3 mm on copper, 0.5 mm on aluminum. Below those thresholds, the fin becomes unstable during the skiving action and tends to tear or fold over. If you need thinner fins, bonded-fin or folded-fin construction is usually a better fit.
What's the typical cycle time per heat sink?
It depends on workpiece size and fin count. A 100 × 100 mm aluminum heat sink with 50 fins takes about 3–5 minutes. A 300 × 200 mm copper heat sink with 150 fins takes 15–25 minutes. The machine is designed for continuous production, so cycle time per unit drops further if you run multi-part fixtures.
How long does the skiving tool last?
Tool life depends on material, fin thickness, and cutting fluid quality. With proper coolant and a well-tuned recipe, a copper-grade tool typically produces 5,000–10,000 fins before replacement. Aluminum tools last roughly 3x longer. Tool change is a few minutes — no special calibration needed thanks to the quick-change holder.