Alternatives to pins and holes for 3D printed assemblies

When we have two 3D printed parts that need to fit together, many of us rely on pins and holes to locate and secure them together. [Slant 3D] explored some alternative ideas in this area that could open up new avenues for your own designs.

Their first idea was to simply chamfer the pins and holes. This allows the object to be printed in different orientations without compromising fit. It also makes the elements less brittle and creates a wider surface for gluing. Another alternative is to use fins and slots, which again add sturdiness over flimsy pins. By chamfering the edges of the fins, they can be printed vertically for good strength and easy registration without the need for support material.

Neither option requires much extra effort over typical pin-and-hole designs. Plus, both are far less likely to break and ruin your day. Be honest, we've all been there. In the meantime, also consider adding bent techniques to your repertoire.