This part was for a client that was creating a startup to sell replacement motorcycle parts. This individual sent me the physical part and, with calipers, I converted this to the 3D space so he could use it to replicate it into a 3d model.
The CEO of Toner Refill came to me to have a complicated gear part designed. This part had the tendency to break a lot and there was no way to replace it without buying the whole sub assembly (costing around 100 dollars) that this gear was a part of. He sent me a broken sample gear so I could convert - with the use of calipers, this part into the 3D space. I worked with him to make it stronger and we ended up printing it out of a Polycarbonate material (Prusament PC Blend). He also sent me the broken sub-assembly that this gear was a part of so I could test out the tooth-alignment and make sure the tolerances were perfect. I then produced many of these parts for him to sell. Find out more about Toner Refill here. https://www.tonerrefill.com/HP-M806-Paper-Tray-Paper-Lift-Gear_p_448.html
This is a set of helical gears I modeled from scratch. I designed them in a modular way so, with the change of a few numbers, the gear can change in size, pitch, and tooth count.