10 Questions to Ask When Choosing a Skived Fin Heat Sink Manufacturer

wekiko / September 27, 2026

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10 Questions to Ask When Choosing a Skived Fin Heat Sink Manufacturer

Posted by BY Thermal · Updated September 2026 · 8 min read

Choosing the right skived fin heat sink manufacturer is one of the highest-leverage decisions in a thermal project. Skiving produces a monolithic fin-and-base structure with no interface resistance — but only when the machine, the tooling and the process are actually under the supplier's control.

The problem is that "skived fin heat sink manufacturer" means different things in practice. Some suppliers trade imported blanks and outsource the skiving. Some run their own machines but only handle aluminum. Some quote confidently and then discover their largest platform cannot reach your fin height. A few engineering questions before you commit will save you weeks of rework later.

Here are the 10 questions we recommend every buyer ask — and what a capable, in-house manufacturer should be able to answer.

1. Do you skive in-house, or do you outsource skiving?

This is the first question to ask, because it decides everything downstream. A supplier that outsources skiving to a third party adds a machine-hour markup to your heat sink and hands your lead time and quality to someone you never audited.

At BY Thermal, the skiving machines used for customer production are designed and built by our sister factory, Dongguan Weihang Industrial Co., Ltd., and operated by our own manufacturing team at Dongguan Baoyue Technology Co., Ltd. Same owner, one group — which means skiving capacity, scheduling and quality control all stay under one roof, with no middleman.

2. What is your minimum fin thickness — and your real repeatability?

Fin thickness is the headline spec of skiving. Thinner fins mean higher fin density, more surface area and better heat dissipation in the same footprint. Industry capability varies from 0.2 mm down to 0.05 mm — and the gap between "can produce" and "can repeat production batch after batch" is where suppliers differ.

BY Thermal holds a minimum skived fin thickness of 0.05 mm on aluminum and copper, with repeat positioning accuracy better than 0.02 mm on our CNC platforms. Ask for the number and how they verify it on production parts, not just on a demo. Not sure what specs to compare? Start with our ultimate guide to skived heat sinks.

Our in-house skiving platform — the machines behind the 0.05 mm fins

3. What are your maximum part dimensions?

Large power electronics, AI servers and energy-storage systems push heat sink sizes well beyond what small machines can reach. A supplier's platform range defines the envelope you can design into.

BY Thermal's in-house skiving platforms cover compact prototypes up to industrial formats: maximum skiving length of 3500 mm on our largest platform, maximum fin width of 1200 mm, and maximum fin height of 150 mm in aluminum or 60 mm in copper. If your part sits inside that envelope today — or will next year — you have headroom to grow without changing suppliers.

4. Can you machine both copper and aluminum?

Copper delivers roughly twice the thermal conductivity of aluminum but is harder to skive: it work-hardens, wears tooling faster and demands different speeds, feeds and blade geometries. Some skived fin manufacturers quietly avoid copper or limit it to short fins.

BY Thermal produces skived fin heat sinks in both materials as standard, including copper fins up to 60 mm height and aluminum fins up to 150 mm. If your project mixes both materials across different SKUs, one manufacturer that handles both simplifies your supply chain.

5. Do you provide thermal simulation and DFM feedback before quoting?

A heat sink is only as good as the engineering behind it. Manufacturers who act as part suppliers just machine your drawing; manufacturers who act as engineering partners tell you before you cut metal whether the fin pitch, thickness or airflow direction can be improved.

BY Thermal runs thermal simulation and thermal analysis on the design, provides DFM feedback on manufacturability and cost, and supports CAD modeling and fixture design. After order placement, thermal design support is provided free of charge.

custom skived heat sink manufacturer factory WH-3580 CNC machine

Thermal simulation before production — and machines we own and operate

6. How fast can you deliver a prototype — and is the sample representative of production?

Skiving needs no mold, which is why prototyping is fast compared with extrusion or die casting. But "fast" ranges from two weeks to two months depending on whether the supplier has machines free and controls the process.

BY Thermal ships prototypes in 15–25 days, and because the prototype runs on the same in-house machines and parameters as production, the sample represents what you will actually receive at volume — not a hand-finished one-off.

7. What is your MOQ?

For startups, R&D teams and pilot projects, a rigid MOQ is a deal-breaker. Ask directly: can you start with one prototype and scale up only after validation?

BY Thermal generally does not set an MOQ. We make samples first, validate the design, and then scale production to your volume — from a single unit to production runs. This lets you de-risk the design before committing inventory.

8. What capabilities do you offer beyond skiving?

Most real-world heat sink projects need more than skiving: base CNC machining, tapped mounting holes, heat pipe assemblies, brazing, surface treatment, or a full liquid cold plate solution. Managing five suppliers for one assembly multiplies cost and risk.

BY Thermal is a full thermal solutions manufacturer: CNC machining, skived fin heat sinks, extruded heat sinks, die casting, stamping, forging, brazing and welding, anodizing and plating, plus liquid cold plates (microchannel, tube-type and friction-stir-welded) and heat pipe assemblies. One drawing in, one partner accountable for the finished assembly.

9. What quality system and inspection do you follow?

ISO 9001 certification is the baseline, not a differentiator. What matters is what happens between the machine and the shipping carton: dimensional inspection, visual and functional checks, and how failures are handled.

BY Thermal operates under an ISO 9001 quality system with inspection built into the production flow, and provides a quality guarantee (typically one year, excluding man-made damage). Ask for their inspection procedure and a defect-response process — a written answer beats a verbal promise.

10. Can you show real experience in my application?

Thermal requirements differ sharply across industries: AI servers and data centers chase high-density fins; laser and photonics need flat, tight-tolerance bases; EV and energy storage need vibration resistance and thermal cycling reliability.

BY Thermal manufactures custom heat sinks and liquid cold plates for power electronics, AI servers and data centers, photovoltaic inverters, laser equipment, telecom and 5G infrastructure, industrial automation and energy storage systems. Ask for references in your sector — and for the process capability data behind them.

What a good answer looks like

A capable skived fin heat sink manufacturer answers these questions with numbers, not adjectives: 0.05 mm fin thickness, 0.02 mm repeatability, 3500 mm maximum length, 15–25 day prototypes, no MOQ, ISO 9001, and machines they actually own and operate.

Frequently Asked Questions

What is the minimum fin thickness for skived heat sinks?

0.05 mm on aluminum and copper, with repeat positioning accuracy better than 0.02 mm on BY Thermal's in-house CNC skiving platforms.

Do you offer prototypes before mass production?

Yes. Prototype lead time is 15–25 days, and samples are produced on the same in-house machines and parameters as production.

What is your MOQ?

BY Thermal generally does not set an MOQ. We start with samples and scale to your production volume.

Do you manufacture skiving machines?

Our sister factory, Dongguan Weihang Industrial Co., Ltd., designs and builds our CNC skiving machines; BY Thermal operates them for customer heat sink production.

Send Your Drawing and Get a Quote in 24 Hours

Thermal simulation, DFM feedback, in-house skiving — all under one roof.

Request a Quote

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EV Charging Heat Sink Case Study | High-Density Skived Fins

wekiko / August 8, 2026

CASE STUDY · EV CHARGING · POWER ELECTRONICS

High-Density Skived Heat Sink Module for an EV Charging Project

A manufacturing case involving thin, tall skived fins, approximately 0.5 mm fin thickness, 0.5 mm fin gap and 33 mm fin height — with particularly strict requirements for fin verticality, channel consistency and final assembly.

Send Your Drawing for Review View Skived Heat Sink Capability

≈0.5 mm Fin Thickness

≈0.5 mm Fin Gap

≈33 mm Fin Height

2-Piece Heat Sink Assembly

PROJECT BACKGROUND

Why This EV Charging Heat Sink Was More Difficult Than the Dimensions Suggest

High-power charging equipment contains power electronic components that generate significant heat inside a limited installation space. In this project, the customer required a custom air-cooled thermal module built from two separately manufactured skived heat sinks and surrounding sheet-metal structures.

At first glance, the individual dimensions may not appear unusual. The real manufacturing challenge came from their combination: approximately 0.5 mm thin fins, only about 0.5 mm between adjacent fins, a fin height of around 33 mm, and a very strict requirement for fin straightness and verticality.

The two skived heat sink sections were positioned with their fin arrays facing toward the internal cooling area and then integrated into the final module. Because the fin channels were narrow, maintaining a consistent fin array was important both for airflow and for mechanical assembly.

When tall, closely spaced fins need to remain parallel over the complete heat sink, small variations in the skiving process can become increasingly important. This matters not only for appearance, but also for airflow channels, assembly accuracy and repeatable thermal performance.

The key requirement was not simply producing thin fins. The more difficult part was maintaining consistent, vertical fins and narrow airflow channels across two separate heat sink sections so they could be integrated reliably into one thermal module.

THERMAL MODULE STRUCTURE

Two Opposing High-Density Skived Heat Sinks Form the Cooling Module

Unlike a conventional single heat sink, this project used two separately manufactured skived heat sink sections within a larger mechanical assembly.

The high-density fin arrays faced toward the internal cooling region, while sheet-metal parts surrounded the assembly and formed the external module structure.

This arrangement increased the importance of controlling the geometry of both heat sinks. Fin deformation on either component could affect channel consistency, internal clearance or final assembly fit.

Approximately 0.5 mm fin thickness
Approximately 0.5 mm gap between adjacent fins
Approximately 33 mm fin height
Two independent precision-skived heat sink sections
Fin arrays facing toward the internal cooling region
Sheet-metal structure surrounding the assembly
Closely controlled fin straightness and verticality
Dimensional control for final module assembly

Sheet-Metal Enclosure

Upper Skived Heat Sink

Internal Airflow

Lower Skived Heat Sink

≈33 mm fin height

≈0.5 mm fin gap

Simplified two-piece skived heat sink module with surrounding sheet-metal enclosure — not to scale.

CRITICAL MANUFACTURING POINT

Why Fin Verticality Matters in a High-Density Heat Sink

With only a narrow space between neighboring fins, fin position becomes part of the functional geometry of the cooling system.

Airflow Channel Consistency

If a tall fin leans toward an adjacent fin, the local channel becomes narrower. With a dense fin array, maintaining consistent channels helps preserve the intended airflow path through the heat sink.

Pressure Drop & Air Distribution

Irregular channels can introduce additional flow resistance in specific areas. For forced-air cooling designs, geometry and airflow therefore need to be considered together rather than evaluating fin density alone.

Final Module Assembly

This project required two heat sink sections to be integrated with surrounding sheet-metal components. Excessive fin deformation could create mechanical interference or inconsistencies during final assembly.

Project Manufacturing Focus

Application EV Charging Equipment

Cooling Type Forced-Air Thermal Module

Fin Process Precision Skiving

Fin Thickness Approx. 0.5 mm

Fin Gap Approx. 0.5 mm

Fin Height Approx. 33 mm

Heat Sink Structure Two Opposing Sections

External Structure Sheet-Metal Assembly

Critical Control Fin Verticality

PROCESS CONTROL

Controlling the Fin Array Starts Before Final Inspection

For high-density skived heat sinks, final dimensional inspection is important, but consistent fin geometry cannot be created by inspection alone.

Stable manufacturing requires control throughout the process, including raw material condition, workholding, skiving machine setup, cutting tool condition, process parameters and handling after the fins are formed.

This becomes more important as fins become thinner, taller and more closely spaced. Improper handling during downstream machining, inspection or assembly can also deform an otherwise acceptable fin array.

In a multi-component thermal module, dimensional stability must also be maintained through final mechanical integration. A heat sink that meets individual fin dimensions but cannot maintain consistent geometry during assembly may still create problems at the module level.

MANUFACTURING WORKFLOW

From Drawing Review to Thermal Module Assembly

Drawing-based heat sink projects are reviewed around both thermal geometry and manufacturing requirements before production.

STEP 01

Drawing Review

Review fin geometry, base dimensions, critical tolerances, mounting features and final assembly requirements.

STEP 02

Process Planning

Evaluate skiving direction, workholding, machining sequence and potential deformation risks.

STEP 03

Precision Skiving

Produce the high-density fin arrays while controlling fin formation, spacing, straightness and consistency.

STEP 04

Inspection

Check key dimensions, fin geometry, verticality, base features and other drawing-defined requirements.

STEP 05

Module Assembly

Integrate both skived heat sink sections with the required sheet-metal structure and verify final fit.

QUALITY CONTROL

What Should Be Inspected on a Tall, Thin-Fin Skived Heat Sink?

Heat sink inspection should follow the customer drawing and the functional requirements of the complete assembly. For a dense fin structure like this one, several characteristics deserve particular attention.

Fin Geometry

Fin thickness
Fin gap / spacing
Fin height
Fin straightness
Fin verticality

Machined Features

Overall dimensions
Mounting features
Hole positions
Critical base dimensions
Drawing tolerances

Module Assembly

Two-part alignment
Sheet-metal fit
Mechanical clearance
Fin protection
Final module dimensions

ENGINEERING TAKEAWAY

High Fin Density Is Only Useful When the Geometry Can Be Manufactured Consistently

Increasing fin density can provide more heat transfer surface area inside a limited envelope, which is one reason skived heat sinks are frequently considered for compact power electronics.

However, more fins do not automatically mean better cooling. Fin thickness, fin height, channel width, airflow, pressure drop, fan capability and available installation space all interact.

In practical manufacturing, engineers also need to consider whether the proposed geometry can remain stable through machining, inspection, handling and final assembly.

This becomes especially important when multiple heat sink sections and structural components must work together as one finished thermal module.

For this EV charging project, the manufacturing value was not simply achieving approximately 0.5 mm fins. The more important requirement was producing repeatable high-density fin arrays with tall fins, narrow channels and controlled verticality — and then successfully integrating two heat sink sections into the final sheet-metal thermal module.

RELATED APPLICATIONS

Where Similar High-Density Skived Heat Sink Modules May Be Used

Similar manufacturing approaches can be relevant to compact, high-power systems where forced-air thermal performance and limited installation space drive the need for dense fin structures.

EV Charging Power Modules

DC Fast Chargers

Power Conversion Systems

Inverters & Rectifiers

Energy Storage PCS

Industrial Power Supplies

SiC Power Electronics

High-Power Electronics

ENGINEERING FAQ

Frequently Asked Questions About EV Charging Heat Sinks

Why use a skived heat sink for EV charging power electronics?

Skiving can create thin, closely spaced fins directly from the heat sink base. This gives designers more freedom to create dense fin arrays for forced-air cooling applications where conventional extrusion geometry may be restrictive. The final fin geometry should always be evaluated together with airflow and pressure-drop requirements.

Can skived heat sink fins be approximately 0.5 mm thick?

Yes. BY Thermal manufactures custom skived heat sinks with different fin thicknesses and geometries. However, manufacturability depends on the complete design, including material, fin height, fin length, fin spacing, heat sink width, base geometry and dimensional requirements. A drawing review is recommended before confirming production capability.

Why is fin verticality important?

For tall fins with narrow spacing, excessive leaning or deformation can change local airflow channels and may create mechanical interference during assembly. Fin verticality can therefore become an important functional manufacturing requirement rather than simply a cosmetic one.

Can two skived heat sinks be assembled into one thermal module?

Yes. Depending on the application, multiple heat sink sections can be integrated with CNC-machined parts, sheet-metal structures, heat pipes, fans or other components. Assembly requirements should be included in the 2D drawing or 3D model so dimensional relationships can be reviewed before production.

What information should I send for a custom EV charger heat sink quotation?

A 2D drawing and 3D model are preferred. Please also provide material, prototype and production quantity, critical tolerances, surface finish, assembly requirements and target delivery schedule. If thermal optimization is required, heat load, heat-source location, airflow, ambient temperature and allowable component temperature are also useful.

CUSTOM PROJECT?

Developing a Heat Sink for an EV Charger or Power Module?

Send us your 2D drawing, 3D model or thermal requirements. Our team can review the fin geometry, material, CNC features, assembly requirements and manufacturing feasibility before quotation.

Send Your Drawing Explore Skived Heat Sinks

Custom manufacturing based on customer drawings. Prototype and production requirements are reviewed project by project.

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THERMAL SOLUTIONS

wekiko / October 20, 2025

Thermal Solutions

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BY Thermal possesses professional thermal R&D and production engineering capabilities, delivering one-stop thermal management services to various industries. Our service scope includes thermal design, development, testing, optimization, design for manufacturability (DFM), and system manufacturing & production. Through continuous innovation, we provide support throughout the customer’s entire design cycle and customize high-cost-performance thermal solutions and systems tailored to their specific needs.

Thermal Management Solutions

Air Cooling

At BY Thermal, our air cooling technology uses airflow to efficiently dissipate heat. It comprises four key components: skived heatsinks, zipper heatsinks, extruded heatsinks, and matching fans, with two main cooling types—forced and natural—to meet diverse device needs.

As a professional thermal management provider, our air cooling solutions apply widely to PC computers, servers, gaming consoles, as well as photovoltaic, Laser, new energy, and power equipment fields, effectively resolving thermal challenges for high-performance operation.

Liquid Cooling

At BY Thermal, our liquid cooling technology is a highly efficient thermal management solution that removes heat from electronic devices via liquid convection or circulation. This advanced solution of ours typically consists of metal cold plates and integrated liquid cooling systems, designed to deliver reliable heat dissipation performance.

As a trusted provider of thermal management solutions, BY Thermal’s liquid cooling solutions are widely applied across multiple fields. They effectively support heat dissipation for high-performance computers, graphics cards, servers, laser machines, and other electronic equipment, ensuring stable operation even under high-load conditions.

Two-phase Cooling

At BY Thermal, our two-phase cooling technology leverages a two-phase vapor chamber, heat pipe assembly, and efficient phase-change heat transfer principle to develop thermal solutions that are fast, cost-effective, and reliable. This innovative technology of ours is engineered to address high-heat-density challenges with exceptional efficiency.

As a professional provider of thermal management solutions, BY Thermal’s two-phase cooling solutions are widely applied across key electronic fields. They deliver stable heat dissipation for CPUs, GPUs, high-power electronic packages, computers, and various electronic devices, ensuring optimal performance even in demanding thermal environments.

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Custom Heat Sinks

wekiko / January 3, 2025

Drawing-Based Custom Heat Sink Manufacturing

Custom Heat Sink Manufacturer

BY Thermal manufactures custom aluminum and copper heat sinks from customer 2D/3D drawings, including skived, extruded, CNC-machined and heat-pipe-integrated designs. Send your drawings for manufacturability review and quotation.

Send Your Drawing Request a Quote

Aluminum and copper heat sinks made to customer drawings
Skiving, extrusion, CNC secondary machining and heat pipe integration
Prototype and production support for B2B engineering projects

Custom aluminum and copper heat sinks made to customer drawings

Custom heat sink structures for drawing-based thermal projects.

Parent Capability Page

Custom Heat Sinks Made to Your Drawings

BY Thermal supports B2B engineers, purchasing teams and product developers with custom heat sinks manufactured from customer drawings. When standard heat sinks do not match the required space, mounting features or material requirements, a custom structure can be reviewed and manufactured according to the project drawing package.

This page helps you compare common custom heat sink manufacturing routes, including skiving, extrusion, heat pipe integration and CNC-machined thermal parts. Detailed product examples are linked from each section.

Use this page as the parent overview for custom air-cooled heat sink manufacturing options.

Product Types

Custom Heat Sink Product Types

Select the manufacturing route based on material, fin structure, heat source location, installation space, mounting features and quantity.

Custom skived heat sink with high density fins

Skived Heat Sinks

Skived heat sinks are made by forming fins from the base material. They are suitable for projects that require compact fin structures and drawing-based customization in aluminum or copper. Skiving can also be combined with CNC secondary machining when mounting holes, slots or contact surfaces are required.

Aluminum and copper skived structures
Custom fin direction and base geometry
CNC post-machining support

View Skived Heat Sinks

Custom extruded aluminum heat sink with machined features

Extruded Heat Sinks

Extruded heat sinks use aluminum profiles as the base structure. They are suitable for profile-based designs where the cross-section can be formed by extrusion and then finished with CNC secondary machining, surface treatment and project-specific mounting features.

Aluminum profile heat sink structures
CNC machining after extrusion
Surface treatment by project requirement

View Extruded Heat Sinks

Custom heat pipe heat sink for thermal spreading

Heat Pipe Heat Sinks

Heat pipe heat sinks integrate heat pipes with skived, extruded or machined structures to help move heat from a concentrated source area to a larger heat dissipation area. The heat pipe route, contact method and assembly direction should be reviewed with the drawing.

Heat pipe and heat sink integration
Custom grooves and assembly features
Suitable for offset heat source layouts

View Heat Pipe Heat Sinks

CNC-Machined Thermal Parts

CNC-machined thermal parts can include heat sink bases, cold plate components, thermal housings, mounting structures and copper thermal parts. This route is useful when the drawing requires holes, threads, pockets, steps, cutouts, locating features or precise contact surfaces.

Heat sink bases and thermal housings
Mounting holes, threads and pockets
Aluminum or copper thermal parts

Review CNC Thermal Parts

Process Selection

How to Select a Custom Heat Sink Manufacturing Method

Manufacturing Method	Typical Structure	Main Advantages	Key Design Considerations	Best Suited For
Skiving	Fins formed from aluminum or copper base material	Good fit for certain high-density fin structures and integral base-fin designs	Material, fin geometry, base thickness, tool access and post-machining requirements	Compact air-cooled heat sinks with custom fin structures
Extrusion	Aluminum profile with repeated cross-section	Efficient for profile-based heat sink structures and repeatable designs	Cross-section feasibility, tooling, profile geometry, secondary machining and finishing	Aluminum heat sinks with consistent profile features
Heat Pipe Integration	Heat pipes integrated with skived, extruded or machined structures	Helps move heat from source areas to a larger fin or airflow region	Heat pipe route, groove design, contact method, working direction and assembly space	Projects with offset heat sources or limited thermal spreading area
CNC Machining	Machined bases, housings, pockets, cutouts and contact surfaces	Flexible for complex mounting and mechanical interface requirements	Material, machining access, contact surfaces, threads, slots, pockets and inspection points	Custom thermal parts with detailed mechanical features

Materials

Aluminum and Copper Heat Sink Materials

Aluminum is commonly selected for custom heat sinks when a project needs a balance of weight, machinability and cost. It is suitable for extruded, skived and CNC-machined structures depending on the drawing and manufacturing route.

Copper can be selected when the design requires stronger local heat spreading or a copper contact structure. The final material should be confirmed according to the customer drawing, heat source, mechanical space, surface treatment and application requirements.

Aluminum Balanced weight, machinability and project cost for many custom heat sink structures.

Copper Useful for local heat spreading and selected contact structures where required by the drawing.

Hybrid Structures Heat pipes, copper inserts or machined features may be reviewed based on the assembly design.

Drawing Review Material selection should follow the drawing, application and manufacturing feasibility.

CNC secondary machining supports custom mounting and interface requirements after the main heat sink structure is formed.

Secondary Machining

CNC Secondary Machining for Custom Heat Sinks

CNC secondary machining can be applied after skiving, extrusion or base material preparation. It is used to create mechanical and assembly features that are specified in the customer drawing.

Mounting holes and threaded holes
Grooves, pockets, steps and cutouts
Locating features and clearance areas
Contact surfaces and installation faces

Finishing and Assembly

Surface Treatment, Heat Pipe Integration and Assembly

Surface treatment and finishing should be selected according to material, drawing requirements, application environment and assembly needs. Options may include anodizing, chemical conversion coating, plating, anti-oxidation treatment or other project-specific finishing methods.

For heat-pipe-integrated designs, BY Thermal can review heat pipe route, groove structure, contact areas and assembly requirements according to the customer drawing package.

Anodizing and appearance finishing by project requirement
Chemical conversion coating or plating where specified
Heat pipe integration and assembly support
Finishing method selected by material, drawing and environment

Quality Control

Inspection Based on Customer Drawings

Inspection should follow the customer drawing and agreed requirements. Common review points may include overall dimensions, mounting features, hole positions, contact surfaces, flatness where specified, appearance, surface treatment and assembly details.

Inspection reports can be discussed when required by the project and agreed before production.

Inspection for custom heat sinks based on customer drawings

Inspection points should be clearly defined in the drawing package before quotation and production.

Applications

Custom Heat Sinks for Industrial and Electronic Equipment

Custom heat sinks are used when standard parts cannot meet the mechanical layout, heat source position, material requirement or mounting structure of the application.

Power electronics

Energy storage systems

Inverters and converters

Industrial control equipment

Data center hardware

Communication equipment

Laser equipment

Custom electronic systems

Project Workflow

From Drawing Review to Production

Drawing Review

Review 2D drawings, 3D models, material requirements and application conditions.

Manufacturability Assessment

Check whether the structure is suitable for skiving, extrusion, CNC machining or heat pipe integration.

Process Selection

Confirm the manufacturing route according to geometry, material, features and quantity.

Quotation

Prepare quotation based on drawings, process route, surface treatment, inspection and quantity.

Prototype

Support sample production according to the approved drawing and manufacturing requirements.

Inspection

Inspect critical features according to the drawing and agreed inspection requirements.

Production

Arrange production after drawing, sample and quotation requirements are confirmed.

Packaging

Pack custom heat sinks according to product structure and shipment requirements.

RFQ Information

What to Send for a Custom Heat Sink Quote

A clear drawing package helps BY Thermal review manufacturability and prepare a more accurate quotation.

Send Your Drawing for Review

2D drawing

3D model

Overall dimensions

Material

Fin structure

Heat source location, if available

Mounting features

Contact-surface requirements

Airflow condition, if available

Surface treatment

Prototype quantity

Production quantity

FAQ

Frequently Asked Questions

What information is needed to quote a custom heat sink?

Please provide 2D drawings, 3D models, overall dimensions, material, fin structure, mounting features, contact-surface requirements, airflow condition if available, surface treatment and estimated quantities.

Can you manufacture according to an existing drawing?

Yes. BY Thermal manufactures custom heat sinks according to customer drawings and can review the drawing package for manufacturability before quotation.

How do I choose between skived and extruded heat sinks?

Skived heat sinks are suitable for certain high-density fin structures, while extruded heat sinks are based on aluminum profiles. The choice depends on material, geometry, quantity and manufacturing feasibility.

Can CNC machining be added after skiving or extrusion?

Yes. CNC secondary machining can be used for mounting holes, threads, grooves, pockets, steps, cutouts, locating features and contact surfaces.

Can heat pipes be integrated?

Yes. Heat pipes can be integrated with suitable skived, extruded or machined structures. The heat pipe route, groove design, contact method and working direction should be reviewed with the drawing.

Do you manufacture aluminum and copper heat sinks?

Yes. BY Thermal supports aluminum and copper heat sink structures according to customer drawings and project requirements.

Can you support prototypes and production quantities?

Yes. BY Thermal can support sample and production projects after the drawing, process route, quotation and inspection requirements are confirmed.

What surface treatments can be specified?

Surface treatment may include anodizing, chemical conversion coating, plating, anti-oxidation treatment or other project-specific finishing methods depending on material, drawing and environment.

Can inspection reports be provided?

Inspection reports can be discussed when required by the project and agreed before production. Inspection should follow the drawing and confirmed requirements.

What applications use custom heat sinks?

Custom heat sinks are used in power electronics, energy storage systems, inverters, converters, industrial control equipment, data center hardware, communication equipment, laser equipment and custom electronic systems.

Custom Project Review

Have a Custom Heat Sink Drawing?

Send your 2D/3D drawings, material requirements, heat source information and quantity. BY Thermal will review the custom heat sink structure and manufacturing route for quotation.

Send Your Drawing Contact BY Thermal

SKIVING PROCESS

Skiving is a precision manufacturing technique. Specifically, it creates high – density, thin fins on heat sinks by shaving material from a base metal (typically aluminum or copper). This process, in turn, ensures seamless fin integration. Thereby, it enhances thermal conductivity and dissipation efficiency. Skived fins are ideal for compact, high – performance applications like electronics cooling. For instance, they offer superior surface area and structural integrity compared to bonded or extruded alternatives.

EXTRUSION PROCESS

Extrusion is a versatile manufacturing method. Specifically, it shapes heat sink profiles by forcing molten metal (often aluminum) through a die under high pressure. As a result of this process, continuous, uniform fins with consistent thermal performance are produced. Naturally, it’s ideal for large – scale production. Moreover, extruded heat sinks offer cost – effectiveness and design flexibility. For example, they suit moderate thermal applications in electronics, automotive, and industrial systems. In doing so, they balance efficiency and economy.

CNC Machining PROCESS

CNC machining is a computer – controlled subtractive manufacturing method. Specifically, it creates heat sinks by precisely removing material from a solid block (aluminum, copper, or steel) via rotating tools. Notably, this process enables high accuracy and complex geometries. For instance, intricate fin arrays or customized shapes can be made, tailored for high – performance thermal solutions. Moreover, CNC machining suits prototyping and low – to – medium production runs well. It provides superior dimensional control and surface finish. Thus, it ensures optimal heat dissipation in demanding applications such as aerospace and high – power electronics.

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