Mechdesign98 on Instagram: "Best Door Hinge Ever?✨🚪 360° Rotation #engineering #mechanism #3dprinting #machine #automation #mechanical #mechanic #automobile #3ddesign #manufacturing This video demonstrates a gear-driven door hinge mechanism. Unlike standard butt hinges, which are mechanically limited to about 180° due to overlapping knuckles and leaf thickness, this design allows full 360-degree rotation. The hinge uses intermeshing helical gears to guide and support the rotation of a single mo