VORTEX-SPIN: 2.5:1 Magnetic Drink Stirrer & Kinetic Geared Desk Fidget

# VORTEX-SPIN: 2.5:1 Magnetic Drink Stirrer & Geared Kinetic Desk Fidget

Bored waiting for something to be processed? Need to shake away stress? Need to mix your drink? Want to be the vortex God for your glass? 

VORTEX-SPIN combines cycloidal-involute gear mechanics with a hidden magnetic drive engine. Turning the manual thumb-crank spins a 2.5:1 step-up gear train, accelerating the magnetic rotor up to 600+ RPM with a single finger flick. Placed beneath the elevated coaster stand, it wirelessly couples to a stir bar in your glass to create a mesmerizing liquid vortex!

Key Features & Innovations

• 2.5:1 Step-Up Gear Ratio: Inverting standard gear trains to multiply your finger speed into high RPM spinning action.

• Magnetic Vortex Engine: Symmetrical dipole neodymium magnets couple through the coaster plate to drive the included 42mm stir bar.

• 100% 3D Printable (Zero Bearings Needed): Comes with a Direct-Fit Edition featuring integrated low-friction shaft bores. print it and start playing immediately without buying any hardware!

• 608 Skate Bearing Edition Included: Prefer endless ceramic/steel bearing spin times? A dedicated 22mm hub gear set is also provided.

• Unbreakable Coaster Architecture: Designed specifically for PLA printing. Flat-printed structural arch walls with tongue-and-groove rectangular tabs place filament grain along the load path, eliminating Z-axis layer breakage.

• Ultra-Lightweight Minimalist Spine: Features a sleek spine baseplate with anti-tip outrigger legs that saves up to 64% filament and prints in ~30 minutes!

• 100% Support-Free: Every single component is designed to print flat on the bed without support material required.

Hardware & Bill of Materials (BOM):

• Option 1: 100% 3D Printable (Zero Hardware)

  • Just standard PLA filament! Print the Direct-Fit Gears + Baseplate + Crank Knob + Caps.

• Option 2: Full Magnetic Drink Stirrer Edition

  • Magnets for Gear 3 Rotor: 2 Neodymium disc magnets(Press fit holes for 8x3mm)

  • Magnets for Stir Bar: 2 Neodymium disc magnets(Press fit holes for 8x3mm)

  • (Optional) Bearings: 3 standard 608 series bearings.

  • (Optional) Rubber Feet: 4 or 6 standard 8mm adhesive rubber bump dots for baseplate bottom recesses.

Recommended Slicer & Print Settings

Quick Assembly Instructions

1. Baseplate Setup: Place adhesive rubber feet into the recesses on the underside of the baseplate.

2. Mount the Gears:

• Slide Gear 1 (45T) onto Post 1

• Slide Gear 2 (25T) onto Post 2

• Insert magnets into Gear 3 (18T) (one North-Up, one South-Up) and slide Gear 3 onto Post 3

3. Axle Caps & Crank:

• Push the Crank Knob into the top socket of Gear 1.

• Push the Retention Caps into the center pilot holes of Posts 1 & 2.

4. Coaster Stand:

• Push the bottom tabs of the 2 Arch Side Walls into the matching baseplate slots along the sides of Gear 3.

• Snap the Coaster Tray Plate onto the top tabs of the arch walls.

5. Magnetic Stirring:

• Insert matching magnets into your choice of Stir Bar (ensure magnetic polarity attracts to Gear 3).

• Place a cup/glass with water or your beverage on the coaster, drop the stir bar inside, and spin the crank!

Designed in FreeCAD. If you print this, please post your makes and share videos of your vortexes! Happy spinning! FreeCAD files are included as well. It is a parameterized model - So, you can scale/change the components as needed