A crossed roller bearing is a type of bearing where cylindrical rollers are arranged in a crisscross pattern, allowing it to support both radial and axial loads simultaneously. These bearings are known for their compact design, high load capacity, precision, and low friction. Made from materials like steel, ceramics, and polymers, they are commonly used in robotics, medical equipment, optical instruments, CNC machines, and aerospace applications. Crossed roller bearings offer advantages such as high rigidity, reduced wear, and space efficiency, making them ideal for precision machinery and heavy-duty applications in confined spaces.