Wayne Dalton Garage door opener coupler
thingiverse
My garage door opener coupler broke, prompting an online search for a replacement part only to find that it's no longer in stock everywhere I looked, so I decided to take matters into my own hands and fabricate one myself. This is for a timing belt drive model, not the standard roller chain type. To ensure the printed part withstands significant stress, print at 100% infill using high-strength material, such as PLA, which I used at ~210C with overextraction at 105%. For added stability, print with supports positioned centrally. After printing, head to your local hardware store and purchase a suitable bronze bushing, measuring approximately 11/16" (or 5/8") in diameter by some ID x 1" or 1.15". Insert this part into the center hole and reassemble the coupler to get back up and running. My initial attempt at printing this part vertically at 70% infill resulted in a broken piece upon first use due to incorrect limit settings, which led it to collide with the floor. To avoid similar issues, print the part at 100% infill and lay it on its side, ensuring that the door is properly configured. It's impossible to know whether my first print would have survived if I had set up the door correctly. What I do know is that I created this coupler in July 2016, and by November of the same year, it was still functioning smoothly. Update: As of September 3, 2017, it remains operational.
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