Spider Drop Earring — the spider actually SWINGS on its dragline

Every spider-in-a-web earring out there is one static plaque. This one has a pivot.

The spider hangs below the orb web on a dragline whose top end is an eye, captured on a post fused to the web hub and closed by a cone cap. The eye turns on the post. So the whole spider — dragline and all — is a free pendulum that swings side to side in the plane of the earring while you walk. It is printed that way, in place, in one job: nothing to assemble, no pin, no glue, no jump ring inside the mechanism.

Printed and worn — the photo is the actual print, white web and black spider.

How it prints

Flat on the bed, face-up, exactly as modelled. No supports, no brim. The cap is a 1.2 mm radial bridge over a 0.45 mm gap — ordinary print-in-place. The 0.45 mm is deliberate and not the usual 0.3: the eye's top face and the cap's underside are ~10 mm² of flat, parallel, same-filament surface, which is exactly the geometry that welds solid. 0.45 mm is about one nozzle width, so the layer above bridges instead of fusing. If your first one comes out stiff, flex it once by hand — a light break-in is normal on any print-in-place bearing.

The web is a real orb web, not a wheel

Nine spokes — odd on purpose. That puts a spoke straight UP under the hang tab where the load is, and leaves a GAP straight DOWN so the dragline hangs through open air instead of merging into a spoke face-on. Three chord rings are spaced geometrically (wide at the hub, tight at the frame, like the real thing) and every segment is bowed inward, so it reads as a capture spiral rather than a polygon.

The spider is modelled descending head-down, the way one actually rides a dragline: abdomen up at the silk, cephalothorax below, joined by a real pedicel waist. Eight legs, two segments each, cocked in the crouched drop pose.

Files

For a single colour, just print spider_drop_earring.stl. It already contains both bodies at the right relative position, and the spider comes off the plate already swinging.

For two colours (white or glow-in-the-dark web, black spider — what the photo shows), import spider_drop_web.stl and spider_drop_spider.stl together as one object with multiple parts and assign a filament to each. Their coordinates are locked. Do not look for a combined named-solid file: the two bodies are disconnected by design, which is the whole point, and Bambu's "Split to Parts" would just hand them back to you separately anyway.

Print settings

• PLA, 0.2 mm layers, 3–4 walls, 15 % infill (at 1.6 mm plate thickness it is mostly perimeters regardless).

• Flat, face-up, no supports, no brim.

• 20.0 x 40.1 x 4.9 mm, about 0.6 g per earring. Print two for a pair — the design is left/right symmetric, so both earrings are the same file.

• Glow-in-the-dark filament on the web is worth it.

Wearing it

The hang tab at the top of the web takes a standard jump ring — open the ring sideways (never pull it apart), hook it through the tab and your ear wire, close it. That is the entire assembly.

Source

Hand-authored parametric OpenSCAD, self-contained, attached. web_r, n_spokes, n_rings, th, gap_z, drag_len and the whole spider anatomy are variables at the top of the file. part="web" / part="spider" export the two colours separately; part="pair" lays out two earrings on one plate.