How much wall thickness around glued threaded inserts in resin printed enclosure
Hi everyone,
I’m designing a resin 3D printed electronics enclosure, and I need to add threaded inserts for M3 screws.
The inserts will not be heat-set because the part is resin printed. They will be glued into the holes instead.
The insert dimensions are:
- Outer diameter: 5 mm
- Length: 5 mm
My question is: how much material should I leave around the insert hole to avoid cracking?
For example, if the insert hole is around 5.1 mm diameter, what should the outer boss diameter be? Is 2 mm wall thickness around the insert enough, or should I aim for 2.5–3 mm?
The enclosure may experience some vibration, so I want the insert area to be strong but not too bulky because the part also needs to be cost-effective for resin printing.
Any advice from people who have used glued threaded inserts in resin parts would be appreciated.