CNC Machining used in Electronic Components Manufacturing


Computer Numerical Control (CNC) machining has slowly but surely been able to change the way electronic parts are manufactured. You can see this in almost every industry. The aerospace industry uses it to design and create airplane parts, while the military and defense industry uses CNC machining to prototype new material.

These aren’t the only industries that have begun to embrace CNC machining. Medicine, transport and obviously electronic industries use CNC machines to design, create and produce both small and large components.

That being said, what exactly is CNC machining, and what does it entail?

It is a manufacturing process where pre-programmed computer software dictates the movement of factory machinery and tools. This process can be used to control a wide range of complicated machineries such as lathes, grinders, and routers.

CNC machining is mainly used to create electronic parts. Electronic parts vary in terms of size and complexity. As you would expect, the smaller parts have more intricacies, and thus it takes a lot of detail to create them. The same can be said about larger, more complex parts.

Generally speaking, creating smaller and more complex parts will require a lot of manual labor. Besides, because of their complexity and attention to detail, you would expect that the use of manual labor will result in a lot of errors,which are the last things you want in an electronic device.

CNC Machining ensures that regardless of the size and complexity of the parts, they can be produced either in bulk or in singularity. This is the reason why many electronic part manufacturers prefer to use CNC Machining to create prototypes and working parts.

What exactly are the advantages of CNC Machined parts production?

Round the clock production

Since it is machines that are being used to create the electronic parts, you can expect the production to be 24-hours long, seven days a week. What’s more, CNC machining ensures that the production is faster. Thus, in addition to having longer production hours, you can expect maximum output from those work hours.

Advanced machines and licensed, experienced engineers ensure the most accurate, most precise levels of production.Though machines are precise, they still have to be calibrated to produce the wanted outcome. This is where the engineers come in. CNC machining demands the very best engineers on the job, and thus you can expect the best production.

Design and production of electronic part

The main disadvantage when it comes to manually creating the electronic parts is the limitation on the type of parts a particular person can create. To create a wide variety of electronic parts manually, you will need a lot of people.

CNC Machining eliminates this problem. CNC machinery can create any, if not all, of the electronic parts known to man. Additionally, you can also design a new electronic part to be used in a machine.

Ability to use multiple materials

CNC machining makes it possible to use numerous materials. Thus, electronic components can be crafted using different materials, which will increase their efficiency and efficacy.

There are thousands of electronic parts in the market today that have been created or prototyped through CNC machining. Thus, regardless of the electronic component you want, you will still be able to create the electronic parts faster and more accurately through the CNC machining process.

Some of these electrical parts and components include;

Printed circuit boards

Printed circuit boards, often referred to as PCBs, are integral to all electronic products. This is because they are used to connect all the different components of an electronic device through the conductive features they have on their surface.

PCBs are made through a process known as etching. The conductive features they have are made from metallic materials like copper. The substrate underneath the conductive feature is made from non-conductive materials.

Though etching is the most commonly used method of creating PCBs, it isn’t the safest of methods. This is because a plethora of harmful chemicals is used in the process. Thus, it is not advisable for humans to manually do the etching.

Using CNC machining to create the PCBs is thus safer and more precise. Additionally, it is far easier to design the PCBs using CNC machines.

Electronic casings and enclosures

The most often used areas include: mobile phone case, tablet computer back cover, product frame processing, UAV shell processing, mobile phone shell earphone holes and USB holes positioning processing.By using 4.5 axis machining centers, magnetic fixtures, vacuum, multi-position, and zero-point positioning system, the corresponding precision machining can be achieved.

Irrespective of whether the casings are plastic or metallic, you can rest assured that CNC machining will create the most intricate, and thus the most aesthetically appealing electronic casings in the market.

Furthermore, not only do the casings have to be beautiful, but they also have to do their basic function; to protect the electronic components in the interior. Manual molding often does not meet all of these requirements, but CNC machining does and will.

CNC machining can work with a myriad of materials, from metallic to plastic, and still be able to provide a wide array of finishes. You can also be able to engrave the casings and incorporate treads and other features.

    Heat sinks

    Another intricate yet important part of electronic devices is the heat sinks. As small as some of them may be, they are paramount to all devices. Heat sinks are passive heat exchanges that channel the heat generated by the device and transfer it, either into the air or a liquid coolant. This ensures that heat doesn’t build up in the device, which may be detrimental to the device.

    Heat sinks are one of those electronic devices that are both small and complex. Granted, the size of the heat sink is dependent on the device in which it is going to be installed in. thus, smaller devices like mobile phones will require smaller heat sinks.

    Furthermore, not all heat sinks are the same. some have different designs, which maximize their ability to release the heat.

    Thus, molding heat sinks manually is neither efficient nor will it result in accurate designs. However, CNC machining ensures that you will be able to create any fin pattern you want to create. Additionally, you can also use any material you deem fit for the device you want to install the sink in.

    As stated earlier, size is one of the important attributes of heat sinks. CNC machining can create heat sinks, irrespective of their size.

    Connectors and sockets

    Many electronic devices need a couple of peripheral devices to function optimally. Connectors and sockets facilitate the connection of these devices to the main electronic device. The mouse is a peripheral electronic device, with the USB port being a socket.

    Connectors and sockets are perhaps the main CNC machining parts. This is because they have a lot more intricacy, and thus creating them requires paying attention to the details. After all, one small mistake will render both the electronic device and the peripheral device useless.

    CNC machining technology is adept at cutting and creating small metallic components to very tight tolerances. This is not even remotely possible when manual molding is employed.

    With CNC machining, you can be able to produce either one-off devices, short production runs, or long production runs, depending on your preferences. All this is done while ensuring precision and accuracy is maintained.


    The process of prototyping is a very tricky one to navigate through. More often than not, it employs the use of a lot of trials and errors. Ergo, to minimize the number of places where errors can occur, accuracy and precision must be used when creating the prototype components. Thus, if any error is identified, it will be known that it did not occur in the production process.

    Prototyping also requires different levels of production. Initially, one-off components need to be created. Afterward, short-run production is required, so that the components can be tested over a small number of electronic devices.

    If everything goes well, then long-term production can be deployed. The advantage of CNC machining is that it can accurately create and duplicate components. You can therefore be assured that regardless of the stage of production the prototype is in, the component will be accurate, precise, and thus reliable.


    The main advantage that CNC machining offers is its precision and attention to detail. As stated earlier, human errors are eliminated by the use of machines. As a result, CNC machining ensures that products, no matter how small and complex they are, can be created and produced in bulk.

    In Shanghai Jinxi,we made lots of electronic parts by cnc machining over 10years, from small mobile phone accessories,computer frames and shells,audio acessories,turntables,loudspeaker boxes.In recent years, Consumer electronics products seem to be evolving at the speed of light, and the electronics manufacturers must have the ability to design and produce quickly to stay ahead of the competition.With a well established supply chain and partners,we can easily undertake the production task, from prototyping, mass production, surface treatment to assembly and packaging, and you just need to focus on what you’re good at.

    Cora Feng
    Cora Feng

    Project Manager working on CNC Machining since 2010

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