Side Mounted Linear Ball Guides Benefits and Components: Increased life within the same envelope. RoundRail* linear guides feature the new patented Super Smart Ball Bushing* bearings for up to 216X the life or 6X the load capacity of conventional bearings. Cost savings: save time and money preparing your mounting surfaces before bolting down RoundRail linear guides. Superior performance. Continuously supported for maximum (down- & side-) load applications without concerns for shaft deflection. The RoundRail Advantage*. The inherent self-aligning-in-all-directions design of the Super Smart Ball Bushing bearing allows for ultra smooth travel when mounted to wider toleranced prepared surfaces. Unlimited travel lengths without concerns for machined reference edges or butt joint alignment. The Super Smart Ball Bushing bearing…the most technologically advanced and most robust linear bearing in the world. Corrosion resistant versions for maximum performance in harsh environments. Side mounted geometry for increased mounting flexibility. Available in 1/2, 3/4 and 1 inch diameters.