How to Design Parts for CNC Machining

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CNC machining is a popular manufacturing process that uses computer-controlled machines to remove material from a workpiece. It is widely used in various industries such as aerospace, automotive, medical and more. However, designing parts for CNC machining requires specific considerations to ensure the best possible outcome. In this article, we will discuss some tips on how to design parts for CNC machining.

Before we dive into the details of designing parts for CNC machining, let's first understand what CNC machining is and how it works. CNC machining is a subtractive manufacturing process that uses computer-controlled machines to remove material from a workpiece. The machines follow instructions from a computer program to create precise shapes and sizes by removing excess material from a raw block of material. This process makes it possible to create complex geometries with high accuracy and repeatability.

CNC machining

Designing Parts for CNC Machining

When designing parts for CNC machining, it is essential to consider the following factors:

Material Selection:

The choice of material plays a crucial role in CNC machining. Different materials have different properties, such as hardness, toughness, and machinability. Some materials are easier to machine than others, and some require specialized tooling or techniques to achieve the desired result. It is crucial to choose the right material for your application to ensure optimal performance and cost-effectiveness.


Tolerance refers to the allowable deviation from the nominal dimension of a part. CNC machines can achieve very tight tolerances, but the tighter the tolerance, the more expensive the machining process becomes. It is essential to determine the required tolerance for your part to balance cost and performance.

Surface Finish:

Surface finish refers to the quality of the surface after machining. A smooth surface finish is essential for parts that require tight seals or have high aesthetic requirements. The choice of cutting tools and machining parameters affects the surface finish of the final part.

Part Geometry:

The geometry of a part affects its manufacturability and machining cost. Complex geometries require more machining time and specialized tooling, which can increase the cost of the final product. It is essential to consider the trade-off between design complexity and production cost when designing parts for CNC machining.

Designing Your Parts for CNC Machining with Dadesin Precision

Dadesin Precision is a world-leading manufacturer of high-precision machining parts for various industries. Our dedication to precision manufacturing has allowed us to create a complete set of services related to precision parts ranging from production to sales.

Our commitment to precision ensures that we consistently deliver high-quality, high-precision parts to our customers. Whether you need assistance with material selection, tolerance, surface finish, or part geometry, we are well-equipped to handle any project, big or small.

If you are looking for a partner in precision manufacturing, look no further than Dadesin Precision. Contact us today to learn how we can help take your project to the next level.


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