How do crossed roller bearings work?

Crossed roller bearings are a type of roller bearing that have rollers that are arranged perpendicular to each other. They are typically used in high precision applications where high load capacity, rigidity, and accuracy are required.

The rollers in a crossed roller bearing are arranged in an “X” pattern, with each roller spanning the distance between two raceways. This design provides high rigidity and accurate positioning, as well as the ability to carry heavy loads in both radial and axial directions.

In a crossed roller bearing, the rollers are separated from each other by spacers, which maintain the proper roller spacing and prevent the rollers from touching each other. This design helps to reduce friction, minimize wear, and increase the bearing’s life.

The design of a crossed roller bearing also allows for very low torque, making them ideal for applications where high rotational accuracy and low noise are important. They are commonly used in industrial automation, robotics, and medical equipment, as well as in precision measuring instruments, telescopes, and other high-precision machinery.

When installing a crossed roller bearing, it is important to ensure that the bearing is properly aligned and that the load is evenly distributed across the rollers. Proper lubrication is also important to maintain the bearing’s performance and extend its life.