CNC Machining Design Guide
When choosing a CNC machining process to manufacture parts, important items that need to be considered in the basic design concept include improving the manufacturability of the parts, improving the aesthetics, and shortening the production time.

Tolerance
When submitting a production design, it is helpful to mark the acceptable range of tolerances or part dimensions. The tolerances of the parts must be clarified to meet the requirements of the assembly function.
If the specific tolerance is not indicated on the product design drawing, we will make it according to the following goals:
Metal parts: ± 0.05 mm (equivalent to ISO 2768-1 "f class") Plastic parts: ± 0.10 mm (equivalent to ISO 2768-1 "m class")
The above tolerances can usually be achieved, but this largely depends on the selected material and design shape.
Although CNC machining can achieve very strict tolerances, it must increase the debugging and self-inspection process to achieve higher accuracy, which will lead to longer production times and increased costs.
If there are specific functional requirements such as tolerances or fits, we will consider feasibility, so please contact us.
We also provide high-precision machining "ISO 286-2 shaft and hole fit tolerance" to meet the high-quality requirements of core components.
Materials
Plastic：ABS、HDPE、PA、PC、PP、PU、POM、PPS、PEI、PVC、PMMA、PEEK etc.
Metal：Aluminum, Copper, Brass, Stainless Steel, Die Steel, etc.
Thickness
Unlike injection molding, CNC machining does not have sink marks and can produce very large thicknesses. In addition, the thickness does not have to be uniform. Thin-walled parts less than 0.5mm may be deformed due to cutting, vibration or sandblasting of the tool during machining, and it is expected that the minimum tolerance ± 0.05mm will be cut thicker or thinner, resulting in out-of-size. Depending on the shape of the part design, the above problems may occur even when the thickness is 0.5mm~1.0mm. Therefore, we recommend designing the thickness as 1.0mm or more as much as possible.
Finishing
The final step in the CNC machining process is finishing.
We provide a variety of surface finishing treatments to meet the specific requirements of customers. Finishing is optional because the quality of the processed parts is already high.
All processed plastic parts are in the state after cutting. In other words, there are usually tool marks.
On the other hand, some metal parts can also be other options. Soft metals such as aluminum and copper can be sandblasted to create a matte effect. Hard metals such as iron and stainless steel can also be fine-grained sandblasted. For thin-walled parts that may be deformed or cracked by sandblasting, even if you choose sandblasting, we can change it to not sandblasting at our own discretion.
The finishing services we provide include:
Grinding, polishing, sandblasting, painting, electroplating, brushed, anodizing, silk screen, pad printing, laser engraving, blackening, bluing, electrophoresis, passivation, texture, etc.