Ask the Pumpkin – Fortune Telling Fidget Spinner (Print-in-Place, Glow)

Pumpkin Spirit Spinner – Print-in-Place Fortune Telling Fidget

Ask the pumpkin a question, flick it, and let the spirits answer.

A jack-o'-lantern fidget spinner printed in one piece: no supports, no assembly, no hardware. Hold the glowing face hub between thumb and index finger and flick the pumpkin. It spins around the hub on a built-in V-bearing, and when it stops, the flame on top of the face points at your answer.

The mechanism

• Print-in-place V-bearing: a 45° ridge on the hub runs in a matching groove in the pumpkin ring. Both parts start on the bed and print together, with no supports and no overhangs steeper than 45°.

• Only the flanks touch: the straight bore wall above the ridge has extra clearance (0.7 mm), so the ring runs on the two V flanks only and does not drag when you hold it at an angle.

• Balanced ring: the pumpkin is 8-fold symmetric with nothing sticking out, so it spins without wobbling in your hand.

• Elephant-foot chamfer on the first layer, so the bearing breaks free cleanly.

Answers

• English: YES · SOON · SURE · DOUBT · NO · NEVER · MAYBE · LATER

• German: JA · BALD · KLAR · KAUM · NEIN · NIE · WOHL · MORGEN

Files

• pumpkin_spinner_04.3mf / pumpkin_spinner_de_04.3mf: English / German, 0.4 mm bearing gap

• pumpkin_spinner_03.3mf / pumpkin_spinner_de_03.3mf: English / German, 0.3 mm bearing gap for precise printers (less play, may need more break-in)

• tolerance_test.stl: two mini bearings with 0.3 and 0.4 mm gap and the same ridge profile as the spinner. Print it first (about 20 minutes, single colour) and pick the spinner file that matches the gap that works best on your printer

Print settings

• Material: PLA, all parts in the same material, since the inlays only bond to the same plastic

• Layer height: 0.2 mm (optional: variable layer height of 0.1–0.12 mm in the bearing zone, around 1–5 mm height, for smoother flanks)

• Supports: none

• Brim: none, because a brim would glue the hub to the ring

• Seam: aligned or rear, not random, because random seams leave bumps on the bearing surface

• Infill: higher infill or more perimeters make the ring heavier, so it spins longer

• Size: 88.7 × 88.7 × 9 mm

Colours (multi-material, e.g. Prusa INDX / MMU)

• T1 – Orange: Pumpkin ring

• T2 – Black: Face hub and answer text

• T3 – Glow-in-the-dark: Face (eyes, nose, mouth, flame)

Glow filament is abrasive, so use a hardened nozzle for that tool. If you have no glow filament, yellow or neon green works too.

Printed and tested on a Prusa Core One with INDX, in both English and German.

Single extruder? The text and face are flush inlays, so they need a multi-material printer to show up. Printed in one colour, the spinner still works, but the answers will not be visible.

After printing

1. Hold the hub and twist the pumpkin firmly once to break the bearing free.

2. Spin it back and forth for a minute or two so it beds in.

3. Recommended: a short puff of silicone spray (lubricant) into the gap. Without it the bearing turns but feels a bit stiff; with it the pumpkin spins freely and smoothly. Wipe off any excess.

Other languages

Want the answers in your language or with your own words? Leave a comment. Short words of up to about 5–6 letters fit best.

Happy Halloween, and don't ask the pumpkin anything you don't want to know. 🎃