What is your minimum order quantity for custom parts?

We support single-piece prototypes and low-volume runs through CNC machining, 3D printing and urethane casting, and scale to mass production through die casting, injection molding and stamping. Share your target quantity and our engineers will recommend the most cost-effective process.

What tolerances can Sunmy Hardware hold?

Standard CNC tolerances are ±0.01 mm, and critical features can be held down to ±0.005 mm. Dimensions are verified with CMM inspection and documented in FAI reports before shipment.

How do you protect my drawings and intellectual property?

We sign a Non-Disclosure Agreement with you by email before collecting any 3D or CAD files. You work directly with the factory, so your data is never handed off to brokers.

Which quality documents are available with shipments?

Material certificates, RoHS compliance documents, First Article Inspection (FAI) reports and CMM dimensional reports can be supplied per project.

Which manufacturing processes are done in-house?

CNC machining and stamping are performed in our own facilities. Casting and surface finishing are completed by audited partners. All final quality control, CMM inspection and FAI are executed in-house by Sunmy engineers before global shipping.

Which CAD file formats do you accept?

We accept STEP, IGES, STL, DWG/DXF and PDF 2D drawings. Physical samples can also be reverse-engineered.

OEM Custom Square Aluminum Copper Skived Fin Heat Sink High Performance Industrial Electronics LED Thermal Cooling Heatsink Supplier Manufacturer

Product Overview

Engineer superior thermal management with Shenzhen Sunmy Hardware. Our Custom Square Body Heat Sinks are designed for high-power applications requiring exceptional heat dissipation efficiency. Whether for high-lumen LED lighting, industrial power supplies, or CPU cooling, this series combines high-density fin capability with precise geometric stability. Available in both 6000 Series Aluminum Alloy (for lightweight efficiency) and Pure Copper (for maximum thermal conductivity), our heat sinks are manufactured to meet exact client specifications.

Process & Manufacturing Insights: Precision Engineering

At Shenzhen Sunmy Hardware, we utilize advanced manufacturing techniques to overcome the limitations of standard extrusion.

Skived Fin Technology

Unlike traditional bonded fins, our skiving process carves fins directly from the solid metal block. This creates a one-piece construction with zero thermal resistance between the base and the fins, significantly improving heat transfer performance.

Precision CNC Machining

Post-molding, we employ high-precision CNC machining for face milling, drilling, and tapping. This ensures flat mounting surfaces and accurate hole positioning for seamless integration into your assembly.

Surface Treatment

We offer professional surface finishing, primarily Anodizing (Clear/Black/Custom), to enhance corrosion resistance, electrical insulation, and aesthetic appeal.

Key Specifications

Based on your technical requirements and our standard capabilities:

Feature	Specification Details
Product Name	Custom CNC Skived Fin / Extruded Heat Sink Assembly
Material Options	Aluminum Alloy (6063, 6061) or Pure Copper (C1100)
Manufacturing Process	Skiving (Cutting Fins), Precision CNC Machining, Extrusion
Shape	Square / Rectangular / Customized Profile
Fin Structure	High-density straight fins (High aspect ratio capability)
Surface Finish	Anodizing (Silver, Black), Degreasing, Anti-oxidation
Tolerance	Precision CNC: ± 0.01 - 0.05mm; General: ± 1%
Dimensions	Fully Customized (Based on client drawings)
Application	LED Lighting, Server CPUs, Inverters, Medical Devices
MOQ	2 Pieces (Support for Prototyping)
Lead Time	15 - 21 Days
Origin	Guangdong, China (Shenzhen Sunmy Hardware Co.,Ltd.)

Major Features & Advantages

Optimized Thermal Performance The high-density fin structure maximizes surface area within a compact footprint, solving overheating issues in confined spaces.
One-Piece Integrity No solder joints or adhesive layers interfere with heat transfer, ensuring long-term structural and thermal reliability.
Flexible Customization From fin height and thickness to base plate dimensions, we tailor every aspect to your thermal simulation requirements.
Rigid Quality Control All parts undergo strict dimensional inspection and visual checks before packing (Foam + Carton protection).

Technical FAQ

Q1: Can you manufacture heat sinks based on my 3D CAD drawings?

A1: Yes, absolutely. We specialize in custom manufacturing. Please send your drawings (STEP, IGS, PDF) and we will provide a DFM (Design for Manufacturing) review and quote.

Q2: What is the difference between your Aluminum and Copper options?

A2: Copper provides approximately 60% higher thermal conductivity than aluminum, making it ideal for extremely high-heat density components. Aluminum is lighter and more cost-effective, suitable for general industrial and LED applications.

Q3: Your MOQ is listed as 2 pieces. Is this correct?

A3: Yes. We understand that R&D and testing are crucial. We support our clients with low-volume prototyping (as low as 2 units) before moving to mass production.

Q4: What is the typical lead time for a custom order?

A4: Generally, sample production takes about 7-10 days, while standard batch production is completed within 15-21 days, depending on the complexity and surface treatment required.

Q5: What surface treatment options do you offer for aluminum heat sinks?

A5: We offer professional surface finishing, primarily Anodizing (Silver, Black, or custom colors), degreasing, and anti-oxidation treatments to enhance corrosion resistance and aesthetics.

Q6: What machining tolerances can your CNC process achieve?

A6: With our high-precision CNC equipment, we achieve tight precision tolerances within ± 0.01 - 0.05mm, ensuring exact fit and alignment for your thermal assemblies.

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