STO RSTO type cam followers:

RSTO type is without inner ring,it can directly run on the quenched shaft.STO type has inner rings,its inner ring,outer ring and the combinative needle roller retainer assembly can be fitted separately.Because RSTO and STO type yoke type track rollers have no retaining edges and the end retainning rings,axial guiding is needed in fitting.The guiding surface must be precisely machined at least.