N-type cylindrical roller bearings have a single flange in the outer ring, a double flange in the inner ring, and the outer ring can be separated; NU-type cylindrical roller bearings have double flanges in the outer ring, no flanges in the inner ring, and the inner ring can be separated. Type N and NU cylindrical roller bearings can only carry radial loads and accommodate expansion and contraction. When the bearing rotates, there is almost no relative axial displacement of the inner and outer rings. RIU (RIN) and RU (RN) models can be used for shaft support in one or two positions if other axial positioning options are available. N(NU) bearings are ideal for use as floating bearings while accommodating axial expansion and contraction, supporting heavy radial loads, but not for applications with thrust loads.
NJ-type cylindrical roller bearing outer ring double flange, inner ring single flange; NF-type cylindrical roller bearings have a single flange in the outer ring and a double flange in the inner ring. These two types of cylindrical roller bearings can withstand axial loads of up to 10% of radial loads. The axial load conducts pressure between diagonally opposed flanges in a sliding rather than rolling manner. This type of construction is suitable for axially locating bearings in one direction.
NP-type cylindrical roller bearings have a single flange in the outer ring, a double flange in the inner ring, and a separable flat retaining ring on the other side of the outer ring; The NUP type, on the other hand, has a double flange on the outer ring, a single flange on the inner ring, and a separable flat retaining ring on the other side of the inner ring. As a result, these cylindrical roller bearings can withstand small axial loads in both directions. This type of structural bearing can limit the displacement of the shaft in both axial directions concerning the housing, so it is suitable for use as a locating end bearing.
Double-row cylindrical bearings are designed to withstand applications with high radial loads. NNU type (no flange on the outer ring, double flange on the inner ring, and middle flange in the middle of the double row) and NNU (as opposed to NN type).
Four-row cylindrical roller bearings are commonly used in metallurgy carry heavy radial loads in steel, aluminum, and other metal rolling mills, and are available in both cylindrical and tapered bore forms.
Full-load cylindrical roller bearings have no cage and provide higher loads, but the permissible speed is lower, and there are two series: NCF and NNCF.
The Timken ADAPT series of cylindrical roller bearings combines the advantages of traditional cylindrical roller bearings with spherical roller bearings. Its proprietary outer and spherical rollers and cylindrical inner rings combine the key attributes of both bearing types. This unique three-point contact design provides both misalignment and axial displacement performance, optimizes contact stress distribution, and helps improve roller stability, resulting in a more dynamic and reliable cylindrical roller bearing.
These cylindrical roller bearings allow for axial float and allow for a misalignment capacity of 0.5 degrees, allowing the rollers to be aligned with the inner ring regardless of axial displacement and misalignment.