Metal 3D printing vs CNC machining: Know which is best for metal prototypes

With a sheer transformation in the manufacturing processes, companies have numerous advanced options for preparing their products. CNC machining and metal 3d printing are the two most commonly employed methods. One method is known for mass production and increased tolerance while another one is known for higher customization & complexity. 

If you are wondering whether metal 3d printing is better than CNC or vice versa, we have listed all critical decision-making points for you. For picking the best approach for making your metal prototype depends on several important factors which are:

Size of metal parts

A metal 3d printer is capable of printing objects which are between the dimensions of 100mm X 100mm X 100mm to 400mm X 400mm X 400mm. And on the other hand, CNC machines can manufacture objects up to a metre in length. So, if your prototype is compact and has a complex geometry, go for metal additive manufacturing. Otherwise, the CNC method is efficiently capable of producing a large prototype.

Quantity of prototypes

When it comes to the quantity, both additive manufacturing and CNC methods are efficient. However, if you are planning to produce a small batch of prototypes and each and a slight design variation, then 3d printing is the best. It is because, when it comes to flexibility on design iteration, the CNC process is time-consuming as it will require, fixture, tooling each time. But, if you need to produce multiple prototypes that have the same design, then CNC is a wise choice.

Complexity

When it comes to manufacturing complex geometry parts, 3d printing processes are much more capable than the traditional CNC machining. The reason behind it is relatively straightforward— as the additive process works in a layer-by-layer fashion, the printers can freely operate and craft an intricate design. CNC machining is a subtractive process, and sometimes it becomes difficult for the machines to function at certain angles and internal surfaces. To cater to the complexity issue, many 3d printing companies in India now offer professional metal 3d printing to build prototypes.

Tolerances & surface finishing

Online 3d printing of any type, be it metal or other filaments, offers a slightly less surface finishing than the CNC process. Due to this, the post-production work is needed on a metal prototype. And, if you are planning to produce prototypes in bulk, then you need to keep the post-production finishing thing in mind. But, if you need prototypes which are high on tolerances and excellent in surface finishing, CNC is fit for the job. And, if a product needs both complex geometry and tolerance, then manufacturers can use both methods to achieve this. You will easily find professional hubs for metal 3d printing in Pune and other cities to get you started with your design. The answer to metal 3d printing vs CNC machining depends on various factors and you have to choose as per the requirements. But indeed, metal 3d printing is the future, and more industries are integrating it in their operations. If you are planning to upscale your manufacturing line up you can also buy a 3d printer in India and start experimenting with products.