A linear shaft is a straight, precision machined bar on which linear bearings run to create a linear guide system to support or guide the movement of equipment in a linear fashion. A linear bearing, also known as a linear ball bush or bushing, is a bearing that runs on the hardened linear shaft. With the aid of a support at each end, linear shafts and bearings are very quick and easy to set up. They don. offer the high load capacities of a linear guide, and special consideration needs to be taken as to the size of shaft used so it doesn. bend or deflect too much under the load placed upon it, but they are a compact, cost effective solution and are more energy efficient than the linear guides due to recirculating ball technology. Linear shafts, bearings, mounts and supports all available from Automotion Components, your trusted linear motion suppliers.