Custom Aluminum CNC Machining & Extrusion Heat Sinks
Some shops take your drawing and run it through the machines. We take your drawing, study the thermal requirements, figure out where the trouble spots are, and then build you something that actually works the way you intended.
- Product Introduction
Some shops take your drawing and run it through the machines. We take your drawing, study the thermal requirements, figure out where the trouble spots are, and then build you something that actually works the way you intended.
That is the difference between getting a part and getting a solution.
What ZP Do?
We make custom aluminum heat sinks. Full stop. Whether you have a napkin sketch, a rough idea, or fully detailed CAD files, we take it from there. Extrusion, CNC machining, surface finishing-all under one roof. You send the drawing. We handle the rest.
Customization Scope
Extrusion die design and fabrication (your profile, your specs)
01
Precision CNC milling, drilling, tapping, slotting
02
Post-machining for mounting features, pockets, or complex geometries
03
Surface finishing: anodize (clear/black/custom colors), sandblast, powder coat, chemical film
04
Length cutting, deburring, packaging for export
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We work with 6063 and 6061 alloys primarily. Sometimes copper, sometimes other alloys if the job calls for it. No minimums that scare you off. No runaround.
Product Parameters
| Material | 6063-T5, 6061-T6 Aluminum (standard); copper or other alloys on request |
| Thermal Conductivity | ~200–210 W/m·K (6063-T5) |
| Extrusion Profile Size | Up to 320mm circumcircle diameter (CCD) |
| Wall Thickness | As low as 0.8mm depending on geometry |
| Fin Thickness | Down to 1.0mm (high-density configurations available) |
| Fin Height | Up to 120mm |
| CNC Machining Tolerance | ±0.05mm standard; ±0.01mm achievable on critical features |
| Surface Finish | Mill, anodize (clear/black/custom), sandblast, powder coat |
| Lead Time (Samples) | 2–4 weeks depending on complexity |
| Lead Time (Production) | 4–6 weeks after sample approval |
| Quality System | ISO 9001 principles applied; CMM inspection available |
What Makes This Different
We Actually Read Your Drawing
Sounds basic. You would be surprised how many shops just punch in the dimensions and hope for the best. We go through your print line by line. If something does not look right-a tolerance that is tighter than necessary, a feature that is going to be a nightmare to machine-we tell you. Up front. Before you spend money on tooling.
Extrusion + Machining, No Handoffs
The extrusion comes out of our press. It goes to our CNC shop. Same building, same quality standards, same people checking the work. No middleman. No "we sent it to our partner and hope they did it right."
We Do Not Overpromise on Tolerances
Can we hold ±0.01mm? Yes. On the features that need it. But if your mounting surface does not need that kind of precision, we are not going to charge you for it. We machine what matters. The rest gets done clean and square without running up the bill.
High-Density Fins without the Headaches
Thin fins. Tight spacing. More surface area. That is the formula for good thermal performance. But machining those parts without bending fins or breaking tools takes experience. We have done enough of them to know how to fixture them, how to tool them, and how to get them done right.
Product Application
We ship these things everywhere. They end up in all kinds of places:
- LED Lighting – Street lights, high-bay fixtures, stadium lights, grow lights. If it runs hot and needs to stay bright, we have a profile for it.
- Power Electronics – IGBT modules, rectifiers, power supplies, motor drives. The stuff that hums and gets warm just sitting there.
- Telecom Gear – Base stations, RF amplifiers, network hardware. Often outdoor, always needing to shed heat.
- Industrial Equipment – Welding machines, CNC drives, servo controllers. The guts of factories.
- Automotive – EV chargers, battery cooling, onboard inverters. Vibration, heat cycles, tight spaces.
If your device makes heat and you need to get rid of it, we have a way.
How We Make Them
Die Design
1
>>
Extrusion
2
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Stretching & Cutting
3
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CNC Machining
4
>>
Surface Finish
5
>>
Inspection
6
Step 1 – Die Design (If Needed)
You send the profile. We build the die. High-grade steel, precision cut, tested before it ever sees production aluminum. This takes 4–6 weeks for a new die.
Step 2 – Extrusion
Billets go in the press. Profiles come out the other end. 6063-T5 for most jobs-good conductivity, easy to extrude, takes a nice anodize.
Step 3 – Stretching & Cutting
Fresh extrusion has internal stress. We stretch it to straighten and stabilize. Then cut to rough length.
Step 4 – CNC Machining
This is where it gets specific. Mounting holes. Threaded inserts. Counterbores. Pockets for components. We run 3, 4, and 5-axis machines. One setup where possible to keep everything aligned.
Step 5 – Surface Finish
Anodize is standard. Adds corrosion resistance, looks clean, does not interfere with thermal performance. Clear, black, custom colors. Sandblast if you want a matte texture. Powder coat if the job calls for it.
Step 6 – Inspection
Dimensional check. Visual. CMM if the tolerances are tight. No guesswork.
Step 7 – Packing & Ship
Foam. Cartons. Crates if needed. However it takes to get there without damage.
Why Choose ZP?
We have been doing this long enough to know what works and what does not. Extrusion is a science. CNC machining is a science. Putting them together without breaking the bank or missing the deadline-that is experience.
- Engineering support – If your design needs tweaking for manufacturability, we tell you. No ego. Just better parts.
- One roof– Die, extrusion, machining, finish. All here.
- No hidden surprises – Quote is the quote. Delivery is the delivery.
- We ship worldwide – Daily. To Europe, North America, Southeast Asia, wherever.
Frequently Asked Questions
Can you work from my existing drawing?
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Yes. STEP, IGES, DWG, PDF-send what you have. If the drawing is clear, we can build it.
What is the minimum order quantity?
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Depends on the profile size and complexity. Small runs are doable. Large runs are economical. Ask us.
How long does a new die take?
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4–6 weeks for design and fabrication. Then samples. Then production.
What alloy should I use?
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6063-T5 for most heat sinks. Good conductivity, easy extrusion. 6061-T6 if you need more strength. We can advise based on your application.
Do you anodize after machining?
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Yes. Always after. Keeps the cut surfaces protected and the dimensions correct.
Get a Quote
You have a drawing. You have a thermal problem to solve. We have the machines and the experience.
Send us your files. Tell us what you are building. We will get back to you with a quote and a realistic timeline. No fluff. Just answers.
Email: general@zp-aluminum.com
Web: http://www.zpheatsink.com
Location: Foshan, Guangdong, China
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