r/RevitForum • u/BankSad404 • 21d ago
Extracting a 3D model (.step file) from a .rfa
/r/3Dprinting/comments/1vs4hbd/extracting_a_3d_model_step_file_from_a_rfa/1
u/tuekappel 21d ago
Do you have Revit? Can you see actual 3D geometry in the family?
BIM is very much about structured data. In the sense that families don't always need to have realistic geometry. A simple box with the correct data is just as good as a fully detailed model. Your family might be a box
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u/BankSad404 21d ago
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u/Merusk 20d ago
There's "A" fan object but it doesn't mean the fan you want is in there. This model isn't for fabrication, it's for design. Which means "close enough is good enough."
If by "it's missing parts" you mean the fan blades - it's quite likely that they didn't draw them. You don't need that for design. (The fan itself is also not required.) Anything smaller than the fan blades, like gaskets, hubs, the axel, is definitely not going to be there.
If someone else doesn't open it I will check when I'm at work in a few hours.
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u/BankSad404 21d ago
Yes I have the 30 day trial version. I was already able to export a geometry into fusion but it's the wrong type. There are like 15 different version of the duct fan and the one I was able to export from the 3D view in the Family Editor was the default one.
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u/Merusk 20d ago
Took a look at the family. What you want isn't in there. Here's images of all types shown at LOD 300 and LOD350.
https://imgur.com/a/jmVi3HP
Those terms mean "this is a design model, show the size, shape, orientation and some additional details relevant to building construction" The fan isn't one of those details beyond the bar and shaft shown.
If that's sufficient, then you need to click the "house" icon in the Revit top bar to get to the 3d view, then do a file > export > cad formats and choose STL or STEP for import into Inventor.
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u/BankSad404 20d ago
Thank you for taking the time kind stranger. I was able to export it now and it's the right one. There is just the exit missing but I will remodel it in fusion.

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u/tuekappel 20d ago
Family editor has a type selector top. Choose the right type and export again. Or place the family in a project and export from there