Grooved ball bearings, also known as ball bushings, are a type of linear motion bearing that consists of a cylindrical outer shell with grooves on the inner surface, and a set of balls that roll within the grooves. The grooves in the outer shell allow the balls to move back and forth along the axis of the bearing, while the balls provide low-friction support for the load.

Grooved ball bearings are used in applications where linear motion is required, such as in conveyors, actuators, and machine tools. They are suitable for use in high-speed applications and can operate at high loads.

Grooved ball bearings are available in a variety of sizes and configurations, including sealed and open bearings. Sealed bearings have an additional sealing element to protect the bearing from dirt, dust, and other contaminants, while open bearings are exposed to the environment.

Grooved ball bearings are relatively simple in design and are relatively inexpensive compared to other types of linear motion bearings. They are also easy to maintain and are durable, making them suitable for use in a variety of environments.