Custom Pin Fin Heat Sink
- CNC Milling Machining Pin Fin Heat Sink From Prototype To Mass Production
- Technical DFM Support Based On Your CAD Drawings And Save Cost For You
- Enable High-density Airflow Channels For Improved Heat Dissipation
- Integrated Post-Processing From Pin Fin Heat Sink To Surface Finish
- Material Purity Assurance With the Material Certification
Choose Our CNC Pin Fin Heat Sink
Pin fin heat sink is a high precision cooling component. It increases the heat dissipation area through many needle-shaped small columns, thereby accelerating air flow and improving heat conduction efficiency.
In a confined space with complex air flow, a CNC pin fin heat sink is the best choice for custom thermal solution because of omnidirectional heat dissipation and high aspect ratio pins.
Pin Fin Heat Sink By Materials
We offer material certifications to ensure that the heat dissipation efficiency is genuine and reliable. You can select the appropriate materials based on power density, weight and cost requirements for your custom pin fin heat sink.
It is easy for CNC machining because of the light weight and we have to control the accuracy as the thin fins are prone to deformation.
The raw material is high density , so it requires specialized tooling and feed control. When maximum thermal conductivity is required, copper is the best choice.
Pin Fin Heat Sink Geometry & Customization
Round Pin Fin Heat SinksThe surface consists of numerous small circular pillars. Even if the wind volume is small, the heat dissipation effect is still very good.
Plate Fin Heat SinksThe common style of long and thin aluminum sheets. It’s cheap and cost-effective with high cost performance. If you don’t need all-round air blowing, choosing it is the most cost-effective.
Square PinCompared with the cylindrical shape, it has a larger surface area, but the pressure drop (wind resistance) is relatively large at high wind speeds.
Tapered PinFully custom pin patterns designed to optimize your specific airflow conditions.
Feature Box
We do CNC machining pin fin heat sink with a solid aluminum or copper block.
Suitable for high power density devices, such as LEDs, CPUs/GPUs, and power electronic modules.
The needle columns can be made in different shapes, arrangement density, length, and thickness.
Complex needle column structures can achieve high precision through CNC processing or milling.
Complex Structure Pin Fin Heat Sink Processing
We can handle the processing of complex structure pin fin heat sinks, especially for those with densely arranged pins or special shapes. We usually use precise milling for the processing.
Yecheng has 60+ CNC machines, including 20 high-precision Japanese machining centers dedicated to heat sink base flatness control. Our flatness can be controlled within 0.05mm, which is extremely important for the heat dissipation of the chips.
Besides, our process can also achieve very fine pins and extremely high aspect ratios.
Upload your CAD and Get DFM + cost reduction suggestions within 2h.
Surface Finish For Your Pin Fin Heat Sink
We are a one stop pin fin heat sink supplier from CNC milling machining to surface finish.
You can choose the following surface finishings:
- Raw: Remain tool marks after CNC machining.
- Manual Polishing & Sandblast: Remove tools marks
- Anodize: Custom different colors based on pantone color chip
- Optional Treatment: Nickel plating, chromate conversion coating, anti-corrosion coating
- Marking Customization: Laser engraving, laser etching for logo, model or part number
Upload your CAD and Get DFM + cost reduction suggestions within 2h.
Quality and Precision
- Certification qualifications: ISO 9001:2015, CE and RoHS
- Material traceability: Provide MTRs (Material Test Reports) and CoC (Certificate of Conformity)
- Precision testing: Hexagon three-coordinate measuring machine, Keyence optical projector and Surftest surface roughness instrument
- Full-size inspection: we can provide FAI (First Article Inspection Report) to ensure product batch consistency.
With a comprehensive quality management system and high-precision testing equipment, ensuring the reliability and accuracy of each pin fin heat sink for your project.
Typical Applications
We have already done custom pin fin heat sinks for these high-standard industries, so you can also trust us.
We provide customized cooling solutions for high-power LEDs, CPU/GPU heat dissipation, and power modules to ensure stable temperature control and reliable operation.
Our pin fin heat sinks are suitable for base stations and RF modules, effectively reducing temperature rise and ensuring communication signals and equipment stability.
We offer efficient cooling for on-board power supplies and power control modules to ensure long-term reliable operation in high-temperature environments.
Our heat sinks are used in high-temperature motor drivers and servo controllers, enhancing equipment performance and extending service life.
Pin Fin Heat Sink Specifications
- CNC vs Aluminum Extruded
- Performance Table
- Key Concepts
- Power Density Reference
| Item | CNC Machined | Aluminum Extruded |
| Manufacturing Method | Precision milling or skiving from a solid block | Heating and extruding aluminum through a mold, then cutting to size |
| Precision | ±0.05mm, suitable for complex geometries and high-density fins | ±0.2–0.3mm, suitable for regular fins, less precise than CNC |
| Fin Density & Shape | High-density fins, fully customizable complex shapes | Fixed fin spacing, shape limited by the mold |
| Thermal Performance | Very low thermal resistance, single-piece construction, high efficiency | Slightly higher thermal resistance, fewer interfaces but lower efficiency than CNC |
| Surface Finish Options | Anodizing, sandblasting, electrophoretic coating, painting | Anodizing, painting; thickness and detail are limited |
| Manufacturing Cost | Higher cost, ideal for prototypes or small batch high-performance parts | Lower cost, ideal for medium to large volume production |
| Suitable Quantities Lead Time | 1–1000 pcs, suitable for small batches and rapid prototyping 3–7 days prototype | 500–5000 pcs and above, suitable for mass production 15–30 days mold development |
| Power Density (W/cm²) | Recommended Pin Pitch (mm) | Recommended Aspect Ratio (Height/Diameter) | Expected Thermal Resistance Rθ (°C/W) | Expected Pressure Drop ΔP (Pa @2 m/s) | Recommended Cooling Method | Design Notes |
| 1 – 10 (Low Power Density) | 2.0 – 3.0 | 5:1 – 10:1 | 0.5 – 2.0 | 10 – 100 | Natural convection / Low-speed fan | Prioritize low-cost solution, aluminum material recommended |
| 10 – 100 (Medium Power Density) | 1.0 – 2.0 | 10:1 – 20:1 | 0.1 – 0.5 | 100 – 1000 | Forced air cooling (medium speed) | Balance thermal resistance and pressure drop, aluminum or copper recommended |
| >100 (High Power Density) | 0.5 – 1.0 | 15:1 – 30:1 | <0.1 | 1000 – 5000+ | Forced air cooling (high speed) or liquid cooling | Optimize microchannel design, copper or aluminum alloy recommended |
| Parameter | Unit | Better if | Influencing Factors |
| Thermal Resistance Rθ | °C/W | Lower is better | Pin height, pin pitch, material thermal conductivity |
| Pressure Drop ΔP | Pa | Lower is better | Pin spacing, arrangement, channel shape |
| Power Density P/A | W/cm² | Higher is better | Chip power, package area, application scenario |
| Application | Power Density (W/cm²) |
| AI Servers / Data Centers | 50 – 300 |
| Power Modules / Inverters | 20 – 100 |
| LED Lighting / Consumer Electronics | 1 – 20 |
A: Aluminum heat sinks can typically achieve a length-to-diameter ratio of up to 20:1, while copper heat sinks, due to their harder material, can generally be processed with a length-to-diameter ratio of 8–10:1.
A: The smaller the pitch of the heat sinks, the greater the surface area per unit area → the thermal resistance decreases and the heat dissipation performance improves.
If the pitch is too small, it will increase air resistance → the pressure drop rises, which may affect the efficiency or flow rate of the fan.
A: <10 W/cm² → Aluminum + Large pitch
10–100 W/cm² → Aluminum/Copper + Balanced design
>100 W/cm² → Copper + Dense pins + Forced air / Liquid
