$0.50T-8 Pneumatic Linear Stepper Motor

myminifactory

This ultra-compact 3-D printable pneumatic stepper motor measures 8 x 8 x 5.5 mm and features an incredibly small 0.2 mm step size, making it the smallest of its kind. The motor's cylinder cross-section is a mere 2.5 mm square, requiring precision to assemble. To ensure the motor functions properly, print several spare pistons as backups. If one falls on the floor, you might struggle to locate it again. View the video for a closer look at this remarkable motor. Printing in the highest possible resolution is crucial to produce sharp triangular teeth, which are essential for optimal performance. Sine-wave shaped teeth may render the motor inoperable. To complete the motor, cut out 2.6 x 2.6 mm seals from 0.5 mm silicone rubber. Experiment with different settings to strike a balance between low friction and minimal leakage. When using a Polyjet printer like the Objet260 Connex3, switch to glossy print mode to achieve smooth cylinder walls.