Common types of single-row cylindrical roller bearings include: NU type: cylindrical roller bearing with no ribs on the inner ring, NJ type: with one rib on the inner ring, NUP type: with one rib on the inner ring and a flat thrust ring, N type: with no ribs on the outer ring, NH type: with one rib on the inner ring and a tapered thrust collar, NF type: with one rib on the outer ring, RNU type: cylindrical roller bearing without inner ring, RN type: cylindrical roller bearing without outer ring.

Among them:N type and NU type cannot limit the axial displacement of the shaft or housing and cannot bear axial loads. They are commonly used as floating bearings.NJ type and NF type can bear small axial loads on the ribbed side and limit axial displacement in one direction. They are often used in pairs.NUP type and NH type can limit axial displacement of the shaft or housing in both directions within the axial clearance of the bearing and can bear small axial loads in both directions.RN type and RNU type cannot bear axial loads or limit the axial displacement of the shaft or housing. The surface hardness, machining accuracy, and surface finish of the housing inner (for RN) or shaft surface (for RNU), which contact the bearing, should be similar to the raceway of bearing rings. These types are used in applications with limited radial space.