OskarPuzzle | Double Fractional Gears - How can objects have fractional rotation symmetry anyway? @OskarPuzzle | Uploaded December 2023 | Updated October 2024, 1 week ago.
Print it yourself at https://oskarvandeventer.nl/Print-It-Yourself/. Buy at https://i.materialise.com/en/shop/item/double-fractional-gears or at shapeways.com/product/H8FZS7PNB/double-fractional-gears Double Fractional Gears is a spin-off of my Fractional Gears. Whereas the latter features a gear with "half-fold symmetry", this gear system also features a gear with "third-fold symmetry". That gear needs to complete three full turns (1080 degrees) for the gear system to get back to its starting position. So the gear system as a whole has a half:third gearing ratio at average. It was quite a challenge to develop this gear system, with six virtual prototypes and two 3D-printed ones. The biggest problem was to prevent the gears from bumping into each other. The gear-on-gear approach of Fractional Gears did not work. The working solution was to have the teeth spiral around their axle two or three times.
Copyright (c) 2023, M. Oskar van Deventer.
Frequently Asked Question: http://oskarvandeventer.nl/FAQ.html
Buy mass-produced Oskar puzzles at puzzlemaster.ca/browse/inventors/oskar (USA, CA) and sloyd.fi/oskar-deventer-c-151_154.html (EU)
Buy exclusive 3D-printed Oskar puzzles at shapeways.com/shops/oskarpuzzles and https://i.materialise.com/shop/designer/oskarpuzzle
Print it yourself at https://oskarvandeventer.nl/Print-It-Yourself/. Buy at https://i.materialise.com/en/shop/item/double-fractional-gears or at shapeways.com/product/H8FZS7PNB/double-fractional-gears Double Fractional Gears is a spin-off of my Fractional Gears. Whereas the latter features a gear with "half-fold symmetry", this gear system also features a gear with "third-fold symmetry". That gear needs to complete three full turns (1080 degrees) for the gear system to get back to its starting position. So the gear system as a whole has a half:third gearing ratio at average. It was quite a challenge to develop this gear system, with six virtual prototypes and two 3D-printed ones. The biggest problem was to prevent the gears from bumping into each other. The gear-on-gear approach of Fractional Gears did not work. The working solution was to have the teeth spiral around their axle two or three times.
Copyright (c) 2023, M. Oskar van Deventer.
Frequently Asked Question: http://oskarvandeventer.nl/FAQ.html
Buy mass-produced Oskar puzzles at puzzlemaster.ca/browse/inventors/oskar (USA, CA) and sloyd.fi/oskar-deventer-c-151_154.html (EU)
Buy exclusive 3D-printed Oskar puzzles at shapeways.com/shops/oskarpuzzles and https://i.materialise.com/shop/designer/oskarpuzzle
