OW-NSS series overrunning clutch is an internal star wheel type clutch with outer ring, whose external dimensions and bore diameter are same with the light series roller bearings. The inner bore is with the key way. This product only serves as the clutch but not the support. It must be used together with a bearing which will bear the radial or axial load. When the bearing in the same specification is used, the dimension and tolerance of the shaft and seat hole may be the same, for the clutch and bearing.