A linear bushing or a ball bushing is a linear bearing that rides on a round hardened shaft that uses low friction to provide linear guidance.
A Quick History of Linear Bushings
The first designs for linear bushings received a patent in 1945 and it was during the 1950s when these became commercially available. Until profiled rail linear guides were introduced in the 1970s, the linear bushings were used as the main linear motion form for applications that didn’t call for extreme accuracy and load capacity of machined ways.…