Stretch Belt Install Tool (automotive)

thingiverse

I had to replace a stretch belt on my car and a "special tool" is "required". Instead of paying $50 for the one-time use tool, I eyeballed it and made an approximate 3d model of it. And it works! I used PLA 0.3mm and 30% infill, but a stronger material would be even better. The screw part wasn't even necessary, you just have to jam the part into place between the crank pulley and the belt and slowly turn the crank with a ratchet. Best part of using plastic for this is you know you aren't going to damage your pulleys! Important: Print the tool as modeled with the rounded part on the build plate. This strengthens the part because the layers are perpendicular to the stress of compression. Optional: To help the stretch belt slide off the tool, you can give it a quick sanding after printing to smooth it out.