Universal joints (U-joints) are essential components in countless machines, from the smallest remote-controlled cars to heavy-duty construction equipment. They're the unsung heroes of rotational power transfer, allowing for flexibility and articulation in driveshafts and other rotating assemblies. This blog post will delve into the diverse world of U-joints, exploring everything from the tiny "micro U-joints" to the robust "automotive U-joints" and the often-confusing category of "combination U-joints".