How to bring multiple parts into one single file in SolidWorks?
Short Answer
Yes — in SolidWorks, the fastest professional way to bring multiple parts into one single file is to create an assembly, then save it as a multibody part using Save As with the part format. This keeps the bodies in one SLDPRT file. Limitation: external references or mates are not preserved as editable assembly behavior.
What You Need to Know Before
Warning: converting multiple parts into one part file can break design intent if those components rely on assembly mates, in-context references, or separate material definitions. A very common failure is ending up with imported solid bodies that no longer update the way the original assembly did.
How to Bring Multiple Parts into One Single File in SolidWorks
Command: Save As
Shortcut: Ctrl+Shift+S
Quick Steps:
- Open or create an assembly containing all required part files, then go to File > Save As.
- In Save as type, choose *Part (.sldprt)**.
- Click Options, choose All Components or Exterior Faces as needed, confirm, then save to create one single multibody part file.
Variables & Settings
Key Setting: All Components / Exterior Faces / Exterior Components
Expert Setting: this option controls how much geometry is transferred into the new part file. All Components is the standard professional choice when you need all solid bodies in one file. Exterior Faces reduces complexity but removes internal geometry, which can cause downstream modeling or manufacturing issues.
Why it Fails
Cause 1 (Geometry): one or more source parts may contain invalid geometry, imported body errors, or unsolved features that fail during conversion to a multibody part.
Cause 2 (layers/Locks): suppressed, lightweight, or unresolved components in the assembly may not transfer correctly into the new single part file.
Cause 3 (Command/Logic): saving directly from separate part files does not merge them; the command works properly only when the parts are first combined in an assembly context.
Quick Fix & Best Practice
Quick Fix: fully resolve the assembly, unsuppress all needed components, then use *File > Save As > Part (.sldprt) with All Components** enabled.
Manager’s Verdict: use this method when you need a simplified deliverable, neutral manufacturing model, or a single-file reference part. Avoid it when the project depends on assembly mates, bom structure, or independent part updates.
FAQ
Can I merge the bodies into one solid after saving as a part?
Yes, use Combine if the bodies touch or overlap properly.
Will the new file stay linked to the original parts?
Usually no, not in the same editable assembly-driven way.
Can I do this without creating an assembly first?
No, the standard SolidWorks workflow is to place the parts in an assembly first.
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