Handheld Precision Planetary Gearbox

A simple but low-tolerance handheld planetary gearbox with herringbone gears designed to be printed on a UM2.


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Here's a random fun gadget for those those who went the extra mile in tuning their printers. Gearbox has ratios of both 3:1 and 4:1 depending on which parts you hold still.


Parts have been designed to be 0.3mm larger. This should be taken taken into account when printing.

This gearbox was specifically made to be a benchmark/test print for well-tuned Ultimaker 2 printers using Simplify3D as the slicing engine.

If you are unable to assemble the parts as shown or if there is any backlash in the assembled gearbox, you will need to modify the design files/change part dimensions to fit your printer.

Comments here will (probably) be ignored. Please email me if you have comments, questions, concerns, complaints, etc.

For more information, latest design files, pictures, and printing hints see my post at https://0x7d.com/2014/12/handheld-3141-planetary-gearbox/.

Materials and methods

- 3x 10mm M3 Bolts
- 4x 16mm M3 Bolts
- 7x M3 Nuts



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C0edb460822b9fcb15f76cbcc76e0203?default=blank&size=40helloysd added this to the ysd collection ago
15e28202384355b4845a184f786049ad?default=blank&size=40yej1234 added this to the Thingstomake collection ago
29c178f73765f17401ed7145298daf48?default=blank&size=40fjviejo added this to the Gadgets collection ago
47cdd4a2db89b05356db897f04b3830c?default=blank&size=40gusman added this to the utilitarian collection ago
74d76779d416667f51f2eb31a86298c8?default=blank&size=40the_diplomat added this to the gizmos collection ago
3da49e5f162182fd3caf735ba7db70a3?default=blank&size=40Louis Garcia added this to the MΓ©canisme collection ago
Fed8b42b8fbd0ca28014510e91b42bc8?default=blank&size=40Dimitar Solakov added this to the useful collection ago
190031a82480947cfb5bfa829d2a38c6?default=blank&size=40Timothy Renner added this to the gears collection ago
Mini nekoKevin published this design ago