Bearings are essential components in mechanical design and industrial manufacturing. Although they are small in size, they play a key role in transmission systems. Today we are going to talk about two common but very different types of bearings: Deep Groove Ball Bearings and Linear Ball Bearings. Although they both contain "Ball Bearings" in their names, they are very different in structure, function and usage scenarios. Understanding their differences will help engineers and designers make appropriate selections for different projects.