Below is a list of Deep Groove Ball Bearings manufacturers from Boston, Massachusetts. Deep groove ball bearings are rolling-element bearings that provide both radial and axial loads with smooth, low friction motion within a spinning system. These bearings, in addition to angular contact bearings, compose the radial ball bearing category. Ball bearings consist of two races, the pathways in which the balls travel. The inner race is a circular piece of metal that the balls rest on that is fixed in place, while the outer race encloses the balls and is able to spin freely.