4.5m x 12mm Bead Chain Gear
thingiverse
I printed the motorized curtain project from https://www.thingiverse.com/thing:6049408. However, the gear didn't match the curtain bead cord provided with my curtains which had 4.5mm beads and a 12mm pitch. So, I had to design a new one that would match these cords. The shaft hole should fit 28BYJ48 stepper motor/ Designed using OpenSCAD.
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