Rubber Band Winder 15:1

thingiverse

Here is a rugged rubber band winder, 15:1. Created for big Science Olympiad Wright Stuff teams. Sharing. Check out my other designs, e.g. <a href="https://www.thingiverse.com/thing:5163114">Pitch Gauge</a>, <a href="https://www.thingiverse.com/thing:5400866">Hobby Clamp</a>, and <a href="https://www.thingiverse.com/thing:5235452">Balsa Stripper</a>. They might be useful for your team, too. <b>BOM</b> - 1x M3x12mm Screw with two washers for securing knob. - 2x M2.3x5 tapper screws for securing crank to main gear. - 5x M2.3x8 tapper screws for fastening faceplate. - 1.2mm piano wire for final gear's axis & output hook - 2.0mm piano wire for the first two gear axes. <b>Printing & Assembling Notes:</b> - PLA+, 0.16mm layer, 100% infill, No support needed - Calibrate 'flow' and correct 'elephant foot' issue before starting. (I set "Initial Layer Horizontal Expansion" to -0.2mm in Cura to compensate elephant foot.) - (Check photos), carefully create a small kink in 1.2mm output shaft first. After assembly, bend the hook to shape. - Lubricate gears well. (Vaseline or DuPont Dry-Film lubricant aerosol works well.)