Preferred CAD Model File Format for an RFQ

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Preferred CAD Model File Format for an RFQ

3D CAD modelWhen you use our instant online quote system, the first step is to upload the 3D CAD model of your part. Our system analyzes the model, and gives you an instant quote based on your quantity, material and other options.

There are many different file formats for 3D CAD models, so how do you know which to use? When possible, a STEP file with an .stp or .step file extension is the preferred format to upload. STEP is a very common format used by designers and engineers for CAD files.

However, if you don’t have your models in STEP format, we can usually convert them for you from other formats. An exception is the .stl format, which is used for 3D printing, but doesn’t convert correctly for us to use for injection molding. If all you have is an .stl file, you will need to go back to the source file and get it into STEP format.

If you have any issues uploading your CAD models to our system, please contact our project engineers and they will gladly help you upload them, or you can send them to us via email to

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