🌀 Spiral Hourglass (Fidget Toy): Impossible Passthrough

📌 About the Model
Experience the mesmerizing magic of 3D printing with this "impossible" passthrough fidget toy! Watch as the inner cone seamlessly spirals through the outer shell, creating a highly satisfying, smooth mechanical illusion.
Perfect as an anti-stress desk toy or a showcase piece for your 3D printing capabilities.

Designed with perfect proportions: 80 mm in height and 50 mm in base diameter, making it comfortable to hold and play with.
Premium feel: The entire model features 1 mm fillets on all edges, ensuring a smooth, tactile, and comfortable grip without any sharp corners.

⚙ Print Settings
This model is highly optimized for flawless FDM printing and a satisfying mechanical fit.

Material: PLA, PETG, or Silk PLA (Silk filaments look absolutely stunning with the curved spiral reflections!).

Orientation: Print both pieces separately, standing vertically flat on their 50 mm bases.

Supports: Absolutely no supports! The overhang angles are designed to print cleanly "as is".

Infill: 10-15% (Gyroid or Cubic).

Perimeters/Walls: 2 to 3 walls for structural rigidity.

⚠ Engineering Tips for a Perfect Print:

Perfect Tolerances: The model is engineered with a precise 0.2 mm clearance between the inner and outer parts. Ensure your printer is well-calibrated for dimensional accuracy to achieve that buttery-smooth sliding action.

Elephant Foot Prevention: No need to worry about the first layers fusing or sticking! A highly functional 0.5 mm chamfer is integrated into the bottom of the design specifically to counter "elephant foot" expansion, ensuring the parts fit together perfectly right off the build plate.

Z-Seam Alignment: For the smoothest rotation, set your Z-seam to "Random" or carefully align it to the sharpest inner corner. A thick, protruding Z-seam line might catch and prevent the two parts from sliding easily.

🌟 Support the Designer!
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