Design_Single Row Roller bearing
As single row cylindrical precision roller bearings, the rollers are in linear contact with the raceways. They have higher radial load capacity compared with the point-contact ball bearings and are suitable for high speeds.
Double Row Roller bearings

TPI roller bearing company's double row cylindrical roller bearings are, because of their second row of rollers, suitable for very heavy radial loads and provide increased radial stiffness. With a tapered bore design, NN precision roller bearings can reach even much higher rigidity. There are three integral flanges on the inner ring and no flanges on the outer ring, which makes the bearing are separable under a static state.