How Everything’s Made on Instagram: "Heavy-duty industrial chains aren’t just giant metal links — they’re engineered for extreme strength and precision. It all starts with massive steel rods, which are heated until they’re glowing red. Each segment is cut, bent, and shaped into a perfect loop by high-tonnage forming machines. Before the ends meet, the link is positioned through the previous one to lock the chain together. The open ends are then sealed shut using flash welding, where intense elec