Planetary Gearset Retractable Keychain
cults3d
A retractable keychain with moving planetary gears is quite impressive. Other non-printable parts required include a clockwork spring, approximately 3mm wide, which can be obtained from a cheap mass-produced retractable keychain like this one. Additionally, the following components are necessary: a nylon string with a length of about 1 meter, three m3x20 screws, five m3x8 screws, and eight m3 nyloc nuts. Assembly of the device requires the use of certain tools, including a screwdriver, narrow nose pliers, a needle file measuring 3mm in width, fine tweezers, and some adhesive tape. A video demonstrating the assembly process can be viewed at the following URL: https://www.youtube.com/watch?v=6Y1NRpy3nOQ
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