If you have any questions about CNC Machining you may find this list of frequently asked questions about the process useful from greenwhite's blog

1. What factors influence the cost of my CNC machining project? 2.

Any CNC machining project's cost is determined by the type of material used and its cost, the amount of machining time required, the nature of the tolerances required, the necessity for hole tapping, and the type of surface finish desired.

2. What are the ways in which I might reduce the costs associated with CNC machining operations?

Substitute inner radii for sharp internal corners at the corners of your design to create less-than-sharp internal corners.


ii. Whenever practical, use standard component sizes for all of your components. For example, creating parts that are 10 meters tall rather than 10.5 meters tall is more efficient and cost-effective than the latter, which requires human intervention.

Without a draft, you will fail to create CNC prototype parts.

Fourth, simplify the part design to minimize the number of angles and sides to mill. Machining costs would increase proportionately to the amount of angles, axes, and sides in an item.

3. What is the standard tolerance for CNC machining  operations at Premium Parts, Inc.?

Premium Parts complies to the general tolerances stipulated in DIN ISO 2768 when cutting parts. For metal machining, we adhere to fine-class tolerance specifications; for plastics machining, we adhere to medium-class tolerance demands.

4. How can I indicate that the corners of my component must be crisp before it can be manufactured?

You can communicate with us about your design requirements by completing our "get a quote" form or by including a note in your drawing files prior to uploading them.

5. Is it possible to machine ceramics for Premium Parts?

Yes, Premium Parts can machine alumina Al2O3 to your specifications.

6. Is it possible for Premium Parts to process the wood?

No, we are unable to machine wood at the moment.

7. Do you use pins and threaded inserts in your work?

Yes, Premium Parts can assist you with the installation of pin and threaded inserts.

8. What kind of finish might I expect on the component?


In the absence of finish specifications, it is reasonable to expect CNC-machined parts to be delivered free of markings or traces of oxidation. It is feasible to preserve the original state of components or to smooth them down with sanding processes. The type of finish used on the components is determined by their intended use.

9. Am I in a position to provide my own raw materials?

That is correct. To determine whether a material is machineable, it must first be recognized and studied.

10. Are you able to re-machine previously made components?

No, our company does not offer post-machining services for components that were not manufactured by us.

11. How do you handle items with complex structures while working with plastics?

We separate the components for CNC machining  and then rejoin them using adhesives.

12. What types of plastics do you use while prototyping with a CNC machine?

Glues and adhesives can be used to adhere polycarbonate, ABS, PMMA, and polycarbonate/ABS materials together.

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By greenwhite
Added Jan 12



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