Pneumatic rotational stepper motor: R-64
thingiverse
The R-64 is a powerful pneumatic rotational stepper motor. It uses three pistons which engage on a gear with 8 or 16 teeth. The torque is huge thanks to the 24 mm x 24 mm piston surface area. A M5 threaded bottom plate is available for use with convenient push-in fittings. I also designed several two-cylinder rotational (and linear) motors as described in [this paper](https://ris.utwente.nl/ws/portalfiles/portal/31451916/PneumaticStepperMotors.PDF), but these are [patented](https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=WO&NR=2018038608A1&KC=A1&FT=D&ND=&date=20180301&DB=&locale=) and therefore not so easy to share here. In contrast, the three-cylinder, single-acting motor designs only make use of prior existing technology and are no problem to share. The R-64 presented here is my best attempt so far to circumvent my own patent and maximize torque within the given dimensions. Good luck in building it! July 18, 2018: Changed axle tolerance to 0.2 mm.
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