OpeningYour drawing. Our machines. A heatsink that fits your enclosure and hits your thermal target.We machine and assemble folded fin aluminum heatsinks to your exact print. Every
Custom Folded Fin Aluminum Heatsink | Precision Manufacturing No MOQ
OpeningYour drawing. Our machines. A heatsink that fits your enclosure and hits your thermal target.We machine and assemble folded fin aluminum heatsinks to your exact print. Every unit is verified fo
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Send us your drawing / quantity / material — reply within 24h.
Your drawing. Our machines. A heatsink that fits your enclosure and hits your thermal target.
We machine and assemble folded fin aluminum heatsinks to your exact print. Every unit is verified for fin pitch, flatness, and interface finish before it leaves our floor. No surprises at incoming inspection.
Tolerance: ±0.05 mm on critical mounting surfaces
Fin pitch: 2.0 mm to 8.0 mm standard, tighter on request
Lead time: 10–15 working days for prototypes, 20–25 for production runs
No MOQ – send one drawing or ten thousand units
100% dimensional inspection report with every batch
Clear anodize (≤10 µm), black anodize, chemical film (Alodine), bead blast, as-machined
Flatness (base)
≤0.05 mm over 100 mm
Parallelism (fin tips)
≤0.10 mm over full length
Tolerance (machined features)
±0.05 mm
Batch size
1 pc to 100,000 pcs
Inspection
CMM, optical comparator, surface roughness tester, thermal resistance test (on request)
Certifications
ISO 9001:2015, material certs per heat number
Three reasons buyers send us their drawings
1. Batch-traceable quality, not just a sample.
We assign a unique job number to every order. Raw material heat numbers, machine operator, CNC program version, and inspection results are linked to that number. If a problem shows up in your line, we trace it back to the exact batch and hour it was made. You get a PDF report with every shipment – not a generic certificate, but actual measured values for the dimensions you care about.
2. One factory for CNC + stamping + springs + heatsinks.
Most heatsink shops only do extrusions or only do stamping. We run four lines under one roof. That means your folded fin heatsink, its stamped mounting clips, and the compression springs that hold it against your IGBT can all come from the same factory. One purchase order, one quality system, one freight bill. Fewer suppliers means fewer excuses when something doesn't fit.
3. We've been making heat sinks for 20 years.
Our engineers have seen the failure modes – fin tilt from bad tooling, base concavity from residual stress, anodize buildup on critical surfaces. We design our process around avoiding those. We also flag issues in your drawing before we cut metal. If your fin pitch is too tight for the alloy you specified, we tell you before you pay for tooling.
Where these parts are used
Folded fin aluminum heatsinks are the workhorse for forced-air and natural convection cooling in dense electronics. Common applications:
Power electronics – IGBT modules, rectifiers, motor drives, inverters in industrial cabinets
Telecom equipment – base station power amplifiers, RF modules, high-power transmitters
LED lighting – high-bay fixtures, street lights, horticultural grow lights
Medical devices – MRI gradient amplifiers, CT scanner power supplies, laser drivers
Energy storage – battery management systems, DC-DC converters, chargers
Automotive – EV onboard chargers, DC fast chargers, motor controllers (non-safety critical)
Test & measurement – bench power supplies, electronic loads, signal generators
Folded fins give you 2–3 times the surface area of a flat plate in the same footprint. They are lighter than die-cast or skived heatsinks, and tooling cost is a fraction of an extrusion die. That makes them the right choice for medium volumes (100–50,000 pcs/year) and for geometries that change between product revisions.
Q: Do you really have no MOQ?
A: Yes. We run prototype quantities of 1–5 pieces on the same CNC machines we use for production. You pay a slightly higher per-piece rate for small batches, but you get the same process, same inspection, and same quality system. When you scale up, the per-piece price drops automatically.
Q: What tolerance can you hold on fin pitch and base flatness?
A: Fin pitch ±0.10 mm, base flatness ≤0.05 mm over 100 mm, and machined mounting surfaces ±0.05 mm. These are standard, not "best case." If you need tighter – for example, ≤0.02 mm flatness for a vapor chamber interface – we can do it with an extra grinding step.
Q: What is your lead time for a custom folded fin heatsink?
A: Prototype (1–10 pcs): 10–15 working days after drawing approval. Production (100+ pcs): 20–25 working days. We keep 6063-T5 and 6061-T6 stock in common sizes, so we can start cutting the day you approve the quote. Urgent orders can be expedited to 7 days for a 20% surcharge.
Q: Can you provide material certificates and inspection reports?
A: Yes. Every order ships with a mill certificate for the aluminum heat number and a dimensional inspection report listing measured values for all critical features. If your quality department requires PPAP level 3 or first article inspection (FAI), we provide that at no extra cost for orders above 500 pcs.
Send your drawing
Email your PDF or STEP file to sc@bquq.com. Include your target thermal resistance, airflow conditions, and annual volume. Our engineers will review the design, flag any manufacturability issues, and send you a firm quote within 12 hours on working days.
Prefer to talk? WhatsApp us at +86 13713157787. We answer in English, Chinese, or Spanish.
Precision manufacturing, custom heat sinks, made in China – with 20 years of experience behind every fin. Send your drawing today.
