What Are The Advantages Of Machining CNC Aluminum In Small Batches?

What are the advantages of machining CNC aluminum in small batches?

The cost of opening a die-cast aluminum mold for small batch machining ranges from tens of thousands to hundreds of thousands of yuan, and it takes at least thirty days. This method is simply unaffordable for small batch production. Choosing small batch machining of aluminum parts using CNC machine tools does not require the cost of mold opening, the delivery time is relatively short, and the surface is still very smooth. This is indeed a way that small and medium-sized factories and start-up teams truly recognize and can actually save money.

No mold opening fee and low start-up cost

The first step in traditional die-casting aluminum parts is to open the mold. For a medium-complexity mold, its price in the Yangtze River Delta region is about 80,000 yuan to 150,000 yuan. If there are only a small batch of one or two hundred products, it is absolutely impossible to amortize this cost. However, small batch machining directly skips the step of opening the mold, thus reducing the pressure on start-up capital to an extremely low level.

What we want to look at is the quotations given by foundries in Suzhou and Dongguan in 2025. For CNC aluminum parts, the first-piece processing cost is usually within the range of 500 yuan to 2,000 yuan. Compared with the mold opening fee, there is a gap of dozens of times. In terms of capital occupation, it is completely different.

Less long-term financial risk

Once the mold is developed, if adjustments are made in the product direction, or the market does not accept it, then the money will be lost directly. Small batch machining does not require fixed asset investment, and each order can be accounted for independently. If the order is cancelled, there will be no loss due to scrapping of the mold.

According to the statistical results provided by several OEMs in Dongguan in 2024, if customers who purchase less than 500 items a year choose this method, using the CNC route for small batch machining , on average, they will lose less money every year than choosing the route of opening molds first, which is about 30,000 to 80,000 yuan. Therefore, in terms of whether funds can be used flexibly, the gap between the two sides is obvious.

Delivery time is much faster than mold opening

What are the advantages of small batch machining of CNC aluminum in current industrial practice? , the industry's typical completion cycle for die-casting tools from the initial design stage to the final successful production of parts is 30 days. However, if a component with a very complex structure is encountered, the time required will be extended to 45 days.

On the other hand, for CNC aluminum parts manufactured using small-scale batch processing, companies can produce the first sample within 5 to 7 days after obtaining the relevant design drawings. As for the subsequent large-scale batch delivery work, the overall time usually takes no more than two weeks.

In 2025, a company in Ningbo that specializes in outdoor lighting decided to use CNC machine tools to process all 300 aluminum casings that were originally produced using the die-casting process. The changes brought about by this change are very obvious. The previous production delivery time took forty-two days. As a result, through the new process, the time was directly compressed to within eleven days.

Because they caught up with the favorable opportunity for exporting, the company earned an additional profit of about 120,000 yuan. As for their customers, they directly chose the more advanced CNC production process.

Surface smoothness is enough to see directly

Aluminum products are surface treated through CNC machining. The surface roughness value can be controlled between Ra 0.4 and 1.6 microns. The visual effect is very close to a mirror state, so many products can be directly used without additional polishing and small-batch machining . This can save a lot of polishing processes in the small-batch production mode of machining.

In contrast, problems such as pores, overflow, and flash often appear on the surface of die-casting parts, resulting in a large number of post-processing procedures. In the Shenzhen consumer electronics industry in 2025, about 70% to 80% of customers have skipped the polishing step, and the products shipped directly from the factory are in a finished state.

More post-processing options

CNC aluminum parts can handle almost all surface processes including anodizing, powder coating, chromium plating, hard oxidation and sandblasting. In the Suzhou Industrial Park in 2025, mainstream foundries will basically be able to complete these tasks in one stop.

Due to the alloy composition and surface defects of die-casting parts, the type of high-level post-processing is limited. Hard plating is prone to cracking. Small batch machining gives customers a wide range of options. The specific effect to choose is determined by the terminal requirements. No need to accommodate craftsmanship.

Particularly suitable for small batch scenarios

Prototype verification, small batch trial production, customized modifications, the order quantity in these links is in the range of one to five hundred pieces. This quantity range happens to be the most comfortable golden range in the field of small batch machining . In 2025, more than 60% of the hardware entrepreneurial teams in Shenzhen and Dongguan chose to use CNC to process aluminum alloy parts in the first round of sample production of their projects.

If this quantity can reach thousands, these advantages of die-casting costs will slowly emerge. The common view in the industry is that when the production quantity is less than 500 pieces, choose the machining route. Only when the production quantity exceeds 500 pieces, carefully evaluate whether mold opening is needed. Never lock money in mold costs in advance.

What is the quantity of the project you have now? Should you use CNC processing of aluminum parts, or directly open a die-casting mold? You are welcome to chat about your current situation in the comment area. If you find my content useful to you, please give it a like and forward it to your peers.