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Artistic, geometric solids that roll as smoothly as spheres. Equal parts desk ornament, kinetic art piece, and mathematical curio.
Artistic, geometric solids that roll as smoothly as spheres. Equal parts desk ornament, kinetic art piece, and mathematical curio.
123 backers pledged $5,716 to help bring this project to life.

About

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Roloids | Solids of Constant Width

$5,716

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What is a prototype?

A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

Proof of Concept

Explorations that test ideas and functionality.

Functional Prototype

Demonstrates the functionality of the final product, but looks different.

Appearance Prototype

Looks like the final product, but is not functional.

Design Prototype

Appearance and function match the final product, but is made with different manufacturing methods.

Production Prototype

Appearance, function, and manufacturing methods match the final product.

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Prototype Gallery

These photos and videos provide a detailed look at this project’s development.

Artistic, geometric solids that roll as smoothly as spheres. Equal parts desk ornament, kinetic art piece, and mathematical curio. Meet the Roloid.

As intriguing to the artist as they are to the mathematician, Roloids are based on two-dimensional curves with incredible mathematical and aesthetic properties. They were studied by such famous figures as Leonardo da Vinci and the mathematician Leonard Euler.

Inspiration

Our crowdfunding mission is to produce these obscure shapes in high-quality materials to share our fascination with artists and engineers alike.

These sculptures roll with pleasantly unintuitive smoothness, inspiring mindfulness and creativity in people of all ages. Perfect for artists, scientists, teachers, learners, and anyone who appreciates wonder in simplicity.

Its striking appearance and elegant shape make it the perfect desktop sculpture to stimulate conversation and mindfulness.

Mathematics

Roloids are non-spherical solids that amazingly have constant width in every direction—allowing them to roll smoothly. They are derived from two-dimensional curves that were put into use by the 19th-century German engineer Franz Reuleaux.

Constant width in every direction
Constant width in every direction

These curves are generated by joining circles centered on the points of regular or irregular convex polygons with odd numbers of sides (triangle, pentagon, heptagon) and can be rotated about a bisecting axis to create a three-dimensional solid.

Try to get it to land right side up!
Try to get it to land right side up!

These solids roll smoothly even though they are not spherical. This incredible property is shared by only a handful of shapes, all of which must have a constant width in every direction. Although they will roll in a straight line with enough force, Roloids have an oscillating velocity due to an uneven center of mass.

Production

These beautiful shapes are produced through a process known as sand casting which involves pouring molten metal into molds made of sand and clay, resulting in a shape of exactly the desired dimensions.

Finally, their elegant and striking appearance comes from hand polishing each one to perfection. This results in beautiful pieces that add elegance and charm to any space.

Rewards

Roloids come in three different metals:

  • Stainless Steel -- A clean, classic material and the lightest of the three metals.
  • Brass -- A beautiful crisp golden color with natural antimicrobial properties!
  • Copper -- Also naturally antimicrobial, copper Roloids are forged at high heat and pressure to achieve the perfect shape and coloration.  
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Visit ghrostyschuff.com to see our full selection!

Risks and challenges

We are working with a reputable supplier to ensure our production process is as smooth and pain-free as possible. Although hiccups can occur anytime manufacturing is involved, we've had a successful prototyping phase and don't anticipate any delays in getting things "rolling" once we hit our goal. We look forward to working with you to make this a reality!

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Support

  1. Select this reward

    Pledge $35 or more About $35

    Any 1 Roloid (To retail at $45)

    Choose from Copper, Brass, or Steel.

    (Pledge in multiples of $35 to buy 2!)

    Free shipping!

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    Estimated delivery
    Ships to Anywhere in the world
    59 backers
    $
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  2. Select this reward

    Pledge $99 or more About $99

    Any 3 Roloids (To retail at $135)

    Choose any combination of Copper, Brass, or Steel.

    (Pledge in multiples of $33 to buy up to 6!)

    Free shipping!

    Less
    Estimated delivery
    Ships to Anywhere in the world
    30 backers
    $
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  3. Select this reward

    Pledge $192 or more About $192

    Any 6 Roloids (To retail at $270)

    Choose any combination of Copper, Brass, or Steel.

    (Pledge in multiples of $32 to buy up to 9!)

    Free shipping!

    Less
    Estimated delivery
    Ships to Anywhere in the world
    2 backers
    $
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  4. Select this reward

    Pledge $270 or more About $270

    9 or more Roloids (To retail at $405)

    Choose any combination of Copper, Brass, or Steel.

    (Pledge in multiples of $30 to buy 9 or more!)

    Free shipping!

    Less
    Estimated delivery
    Ships to Anywhere in the world
    0 backers
    $
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Funding period

- (42 days)