## Opening
Your drawing defines the part. We make it exactly to that geometry—no interpretation, no shortcuts. Every heat sink is verified against your CAD model before shipment.Tolerance: ±0.05 mm
Your drawing defines the part. We make it exactly to that geometry—no interpretation, no shortcuts. Every heat sink is verified against your CAD model before shipment.
We are a precision manufacturing factory in Dongguan, China, with 20 years of experience across CNC machining, metal stamping, springs, and heat sinks. Your custom heat sinks are made in China, but they meet export-grade inspection criteria—every batch.
| Parameter | Value | Notes |
|---|---|---|
| Materials | Aluminum 6061-T6, 6063-T5, 5052; Copper C1100 | Optional nickel or chrome plating |
| CNC machining | 3-axis and 4-axis mills; spindle accuracy ±0.01 mm | For complex fin arrays and mounting holes |
| Stamping | Progressive dies up to 250 tons; burr < 0.05 mm | For high-volume, thin-fin designs |
| Tolerance | ±0.05 mm (CNC), ±0.10 mm (stamped) | Flatness ≤ 0.10 mm across base |
| Surface finish | Ra 0.8–1.6 µm on base; Ra 1.6–3.2 µm on fins | Optional anodize thickness 8–12 µm |
| Batch size | 1–100,000+ pieces | No MOQ; tooling amortized per order |
| Inspection | CMM for critical dimensions; thermal resistance test on sample | Report included with every shipment |
We use both CNC and stamping in-house. This means you get one process for low-volume prototypes and another for mass production—without changing suppliers. For stamped heat sinks, we maintain die tolerances within 0.02 mm to keep fin pitch consistent across millions of cycles.
2. Inspection report per batch. You receive a dimensional report, material certificate, and surface finish measurement with every shipment. We use CMM for hole positions and fin angles, and a profilometer for roughness. The report is not a formality—it is the actual data from your parts.
3. One factory for CNC + stamping + springs + heat sinks. Most suppliers outsource one of these processes. We do not. Your heat sink assembly might need a stamped clip, a CNC-machined base, and a compression spring for mounting. We make all three under one roof. This cuts your logistics cost, reduces lead time, and eliminates tolerance mismatch between parts from different vendors.
In each case, the drawing specifies the interface. We hold that interface. Your assembly line does not need to rework our parts.
Q: How do you ensure tolerance and quality? A: First article inspection (FAI) is done on the first part, and in-process checks every 50 pieces. Final inspection uses CMM for critical dimensions and a thermal test on a sample from each batch. You get the report.
Q: What is your lead time for custom heat sinks? A: CNC prototypes: 7–12 days after drawing approval. Stamped production: 15–20 days for tooling, then 7–10 days per 10,000 pieces. We ship via air or sea, your choice.
Q: Can you provide material certificates? A: Yes. Each batch comes with a mill certificate for aluminum or copper, showing chemical composition and mechanical properties. We also provide RoHS and REACH compliance documents on request.
Looking for a different part? We also machine Custom Aluminum Heatsink with Mounting Base | Precision Manufacturing China in the same Dongguan factory.
| Parameter | Capability |
|---|---|
| Materials | AL6063/6061/5052, pure copper C1100, copper-aluminum composite |
| Process | Extrusion, CNC machining, skiving, forging, die casting, stamping fins |
| Fin Types | Extruded, pin fin, skived, folded, bonded, heat pipe, vapor chamber |
| Surface | Black anodizing, clear anodizing, nickel plating, powder coating |
| Size Range | Max 1500 x 400 x 300 mm |
| Thermal Test | Thermal resistance and heat dissipation data per batch |
| Prototype | 5-7 days, no MOQ on samples |
| Inspection | CMM, thermal resistance tester, full report per batch |
