Due to the line contact in between rolling elements and raceways, cylindrical roller bearings have higher radial load capacity and they are suited to high-speed applications. Together with a high strength cage design in pressed steel, the most cylindrical roller bearings consist of machined brass or polyamide and provide low noise,low heat generation and, for much more difficult applications, could be provided in a variety of advanced special materials.
N Style single row - N style cylindrical roller bearings have two machined flanges in the inner ring with no flanges on the outer ring, with rollers and cage on the inner ring. Much like the NU style, the N doesn't have thrust load carrying capability.
NU style single row - NU style cylindrical roller bearings have two machined flanges in the outer ring with no flanges in the inner ring.
NJ style single row - NJ style cylindrical roller bearings have two machined flanges in the outer ring plus a machined flange on one side in the inner ring. The roller and cage assembly is in the outer ring. The integral flange on the inner ring enables this bearing to handle an axial load.
NH style single row - NH style cylindrical roller bearings have two machined flanges in the outer ring along with a machined flange on one side of the inner ring. A special-design inner ring enables utilization of a stabilizing ring on the non-flange side. Consequently, these bearings can carry axial loads in both directions. The roller and cage assembly is mounted in the outer ring.
NF style single row - NF style cylindrical roller bearings have two machined flanges in the inner ring and the other flange in the outer ring, with roller and cage on the inner ring. Much like the NJ bearing, these bearings possess some thrust load capability.
NUP style single row - NUP style cylindrical roller bearings are like the NJ style and come with a special ring called a thrust collar. Mounted on the non-flange side of the inner ring, the thrust collar allows the bearing to hold an axial load in both directions. The thrust collar extends out of your bearing on one side, therefore the dimensions across the inner ring is slightly higher than that of the outer ring.
Double row styles (NN, NNU) - Double Row cylindrical roller bearings are denoted by two N's within the part number (e.g., NN or NNU). The size of these can be obtained from the Super Precision section of this catalog and may be ordered with standard precision.
Constant Caster Roller Bearings - These are generally 2-split bearing units of a highly reliable design and have a long service life. Cylindrical roller bearings with self-aligning rings which has a proper alignment function.
S-Type - Sealed-Clean Bearings for chain conveyors demonstrate a higher efficiency under high temperatures and wet conditions for a longer period by having an improved sealing system. These types of bearings are packed with a quality grease of high thermal resistance and durability.
Four Row Cylindrical Roller Bearings - Are usually popular roll neck bearings providing several advantages. First, the inner ring is separable form the outer ring and rollers that allows the inner ring to keep with the roll during grinding processes. This ensures precise concentricity and negligible run-out providing for high rolling accuracy. Second of all, this design enables greater radial load carrying and higher operating speeds. Four row cylindricals should be used along with a thrust bearing that is normally a two row taper, angular contact ball bearings, or perhaps a deep groove ball bearing according to the thrust load present.
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