600-Cell Central Rings.stl

This is a three-dimensional shadow of selected cells of the four-dimensional shape called the “600-cell.”

See here for video: https://youtu.be/IhW48X29e0g 

The 600-cell is one of six regular convex four-dimensional shapes. It is composed of 600 tetrahedral cells.

The full 600-cell is so ridiculously complex that it nearly impossible to see or understand in its entirety, so it is helpful to view it in parts.

If you look closely at this selection of cells, you can see how it is composed of nine interlocking rings connected by “struts.”  In the full 600-cell, these small “struts” are in fact part of complete rings. This gives some idea of how large and complex the full shape would be.

This model is designed for resin printing.


Mario Rings

ring2.stl

Donut Factory Puzzle // 2x2 Twisty Marble Puzzle (24mm & 35mm inner cube)

What's better than a donut? SIX donuts!

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There's a lot going on in the Donut Factory. Twisting, spinning, snapping... the feel is satisfying, but trying to solve this tricky puzzle might leave you frustrated!

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**_Assembly_**

This puzzle is built around a tiny [24mm 2x2x2 puzzle cube](https://speedcubeshop.com/products/eastsheen-mini-2x2-keychain-cube?variant=40210339659889). You will have to remove the keychain part.

Print 8 copies of the included STL. No supports are required, but the overhangs may warp a bit on some printers, so you may want to include a wide brim and increase Z-retraction height for travel moves in your slicer settings.

After printing, use flush cutters to remove the brim and flat bottom.

Magnets are optional, but highly recommended since they improve the puzzle action and make assembly easier as well. You will need 48 3mm x 6mm neodymium magnets. I used E6000 adhesive to glue them into place. Each face has 2 magnets. Make sure the left holes all have the same polarity, and the right holes all have the opposite polarity. Also make sure the magnets are flush to the face. It can help to use the corner of a table or some tool to press the magnets into place. Allow the glue to dry before moving forward.

Next, glue 7 of the 8 sections onto the internal 2x2 cube. Use only enough adhesive to connect the print to the corner of a cube. If too much glue smushes out, your puzzle may not rotate!

Once the 7 parts are in place, load up the marbles. This puzzle was designed for use with these 14mm ABS no hole beads (true dimensions closer to 13.6mm). The easier way to add the marbles is to rotate individual halves 22.5 degrees so the tracks form an S-bend, so you can add all the marbles of one color (8 marbles per ring). Watching my assembly video might make this easier to understand!

After loading the 3 rings opposite of the missing piece, fill the top rings, including the final corner, and then glue that into place. 

The magnets will help hold the parts together while drying, but I like using [0.25" x 4" Grifiti Silicone Bands](https://amzn.to/45QcKz6) to compress the parts as well.

Donut Factory Puzzle // 2x2x2 Twisty Marble Puzzle (24mm inner cube)

3 X Audi keychain

Audi sline keychain.stl

Octagon Concentric Fidget toy - Torture Test (EASY)

ring hoops concentric.stl

CACTICHARM | CACTUS JEWELRY HOLDER & LAMP

CACTICHARM - BASE.STL

Galadriel Sword and Scabbard – Rings of Power

OBJ-Galadriel_Sword_Whole-3Demon.obj

EZPZ Keyring Bone 1" // Keychain Ring

Keyring Bone.stl

Hexagon Concentric Fidget toy - Torture test (EASY)

EZPZ Keyring Flower 1" // Keychain Ring

Keyring Flower.stl

$ Rings

Ring Dollars

Cat Merchant: Secret Jewelry Holder

3MF_Color_Bambu_Cat_Merchant_Secret_Jewlery.3mf

Pentagon Concentric Fidget toy - Torture Test

Closed Hands for Jewelry / Keys / Organizer / Decor

Hands.stl

Heptagon Concentric Fidget toy -Torture test (EASY)

EZPZ Keyring Heart 1" // Keychain Ring

Keyring Heart.stl

BambuLab FanBoy Varsity Ring

BL RING.stl

Elipse Ring

A simple but interesting ring made of intersecting rings! Supports required.

Modern Jewelry Holder

cactusholder.stl

Porites furcata

This coral model, belonging to the coral collection for accessories, honours the species Porites furcata.

Honouring its family (finger coral), it is designed to store rings while decorating your home by immersing it in an underwater environment.

**3D PRINTING PARAMETERS**
The model consists of a single part that is scalable, although its size is correct for conventional rings.

I printed it with purple matte PLA with 15% infill and 0,16 mm layer height.

rings

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600-Cell Central Rings.stl

Mario Rings

Donut Factory Puzzle // 2x2 Twisty Marble Puzzle (24mm & 35mm inner cube)

3 X Audi keychain

Octagon Concentric Fidget toy - Torture Test (EASY)

CACTICHARM | CACTUS JEWELRY HOLDER & LAMP

Galadriel Sword and Scabbard – Rings of Power

EZPZ Keyring Bone 1" // Keychain Ring

Hexagon Concentric Fidget toy - Torture test (EASY)

EZPZ Keyring Flower 1" // Keychain Ring

$ Rings

Cat Merchant: Secret Jewelry Holder

Pentagon Concentric Fidget toy - Torture Test

Closed Hands for Jewelry / Keys / Organizer / Decor

Heptagon Concentric Fidget toy -Torture test (EASY)

EZPZ Keyring Heart 1" // Keychain Ring

BambuLab FanBoy Varsity Ring

Elipse Ring

Modern Jewelry Holder

Porites furcata