Die Casting vs CNC Machining: Understanding the Key Differences

die casting vs cnc Machining

Die Casting vs CNC Machining: Understanding the Key Differences

Die casting vs CNC machining: Two of the most popular industrial processes for creating metal parts. Both are two distinct manufacturing processes with notable differences; however, they can even be combined for the best possible finish.

When it comes to choosing one process over the other, there are several important factors to consider. Read on to find out key differences between die casting and CNC machining to know when you should use die casting and when you should use CNC machining.

  1.   Process:

Die casting is a casting process that involves injecting molten metal into a mold cavity under high pressure. The molten metal solidifies within the mold to form the desired shape. CNC machining is a subtractive manufacturing process where material is removed from a solid block to create the desired shape. It involves the use of computer-controlled machines and cutting tools to precisely shape the material.


  1.   Material:

Die casting is primarily used for non-ferrous metals like aluminum, zinc, and magnesium. These metals have low melting points and good casting properties. CNC machining can work with a wide range of materials, including metals (both ferrous and non-ferrous), plastics, composites, and wood.


  1.   Complexity:

Die casting is suitable for producing complex shapes with intricate details. The mold used in die casting allows for the creation of intricate features, such as thin walls, complex geometries, and internal cavities. CNC machining can produce complex shapes, but it may have limitations in creating extremely intricate features compared to die casting. However, CNC machining offers high precision and accuracy.


  1.   Volume:

Die Casting: Die casting is often used for high-volume production runs. It enables the rapid production of identical parts with consistent quality and dimensional accuracy. CNC Machining: CNC machining is suitable for both low-volume and high-volume production. It is flexible and can accommodate small production runs, prototypes, and custom one-off parts.


  1.   Cost:

Die casting typically involves higher upfront tooling costs due to the need for creating molds. However, it can offer cost advantages for large production runs. CNC machining generally has lower tooling costs since it doesn’t require molds. It is more cost-effective for smaller production quantities and prototypes.


  1.   Waste

After die Casting, there is very little scrap metal left after die casting, which makes it more affordable. CNC Machining can leave a lot more scrap behind when carving away layers of a metal block. If you are concerned about minimising waste, but would prefer to use CNC machining, it is important for a recycling system to be in place in order to reuse the scrap metal.
die casting vs cnc machining
die casting vs cnc machining

Die casting vs CNC machining: Which one to choose?

In summary, die casting is a casting process that is ideal for high-volume production of complex metal parts, while CNC machining is a subtractive manufacturing process that offers flexibility for various materials and customizations. The choice between die casting and CNC machining depends on factors such as part complexity, material, production volume, and cost considerations.

It is sensible to be cautious about initial investment in a project, especially if there is a strict budget. If you are unsure which is the optimal method for you, it is best to discuss this with experts.

TDB is among the leaders in CNC machining from Vietnam. Besides, TDB has a close relationship with other suppliers providing die casting services.

At TDB, we are committed to delivering precision-machined parts that meet or exceed our customers’ expectations. Whether you need prototyping, small-batch production, or large-scale manufacturing, we have the expertise and resources to fulfill your machining requirements.

Contact us today by email or phone to discuss your needs and find the most cost-effective services for die casting and CNC machining.

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