Single Parts vs Assemblies: What We Can and Can’t Make (Yet)
The honest answer to “can AI design the thing I need?” depends on one distinction: is it a single part or an assembly of several parts? PartWork.ai makes one solid part at a time, and it does that well. It does not yet build multi-part assemblies in a single shot. Here is what that means in practice — and how to get exactly what you need today.
What counts as a single part
A single part is one continuous piece of material — what a machinist or printer makes in one go. It can be as detailed as you like: holes, pockets, ribs, bosses, fillets, threads, even a snap hook. As long as it’s one connected solid, it’s a part.
These are all single parts
A mounting bracket, an enclosure lid, a gear, a phone mount, a knob, a spacer, a face-plate with cutouts. One body, however many features.
These are assemblies
A hinged box (lid + base + pin), a gearbox, anything with screws, bearings, springs, or two parts that move relative to each other. Multiple separate bodies.
The quick test
If you could 3D print or machine it as one piece and hand it over finished, it’s a part. If it only works once you bolt, pin, or press several pieces together, it’s an assembly.
Why we focus on one great part at a time
A single, well-formed solid is exactly what you send to a printer or a machine shop — it exports cleanly as an editable STEP solid for CNC, or a mesh for printing. Getting that right — correct geometry, real edges, manufacturable features — is where describing a part in plain English beats wrestling a heavy desktop CAD tool.
Assemblies add a second hard problem on top: how the pieces fit, mate, and move. We’re deliberately doing the first thing excellently before the second. So today, when you ask for something that’s really several parts, the assistant will tell you — and point you at the specific part it can make right now, so you’re never left at a dead end.
How to break an assembly into makeable parts
Almost any assembly can be made today — you just generate the parts one at a time and combine them yourself. The trick is to ask for the individual part, not the whole mechanism:
- Instead of “a hinged box,” ask for the base, then the lid, and design them to share a snap or pin feature.
- Instead of “a bracket bolted to a plate,” make the bracket with the right clearance holes, then the plate to match.
- Instead of “a gearbox,” generate each gear separately so the teeth mesh, then a housing to hold them.
Designing parts so they join without screws? Our guide to press-fit and snap-fit joints covers the clearance values that make two separate parts click together reliably.
Make the part you need now
Describe a single part to PartWork.ai — a bracket, an enclosure, a knob, a gear — and get editable 3D geometry ready to print or machine. If your idea is really an assembly, start with its most important part; the assistant will suggest the exact part to make. See creating parts for how features get added, and exporting when you’re ready for a file.
Start with 2 free AI generations — no card required
Open the studio, describe one part, and export it for printing or CNC. More credits: 100 for $4.99 (~5¢ each).