Roller guides with both super-high load capacity and rigidity. RA and RB model roller guides are a pioneering union of roller bearing and linear guide technologies. Driven by NSK’s extensive knowhow in design, RA/RB models realize both super-high load capacity and rigidity. Their high performance meets the tasks and requirements of today’s machines. With a smart design built by our analysis technology, RA/RB models feature the largest and longest rollers possible to realize the world’s highest level of load capacity. We optimized the design of the slide and rail components down to their very shape to achieve the super-high rigidity of RA/RB models.