CYLINDRICAL ROLLER BEARINGS

1. Types, design features, and characteristics

#Cylindrical #roller #bearings can accommodate #heavy #radial #loads due to the line contact formed between their rolling elements and #raceways. These bearings are also suitable for high speed applications since the rollers are guided by either inner or outer ring ribs. Cylindrical roller bearings are separable, allowing them to be easily installed and disassembled even when interference fits are required.

Cylindrical roller bearing types and characteristics are as follows

NU type N type:

• NU type outer rings have two ribs. The outer ring, roller, and cage assembly can be separated from the inner ring. N type inner rings have two ribs. The inner ring, roller, and cage assembly can be separated from the outer ring
• Unable to accommodate any axial loading
• This is widely used as the floating side bearing in a fixed-float arrangement

NJ type NF type:

• NJ type has two ribs on the outer ring, a single rib on the inner ring. NF type has a single rib on the outer ring, and two ribs on the inner ring.
• Can receive single direction axial loads.
• When there is no distinction between the fixed side and floating side bearing, these types can be used as a pair in close proximity.

NUP type NH type (NJ＋HJ):

• NUP type has a collar ring attached to the ribless side of the inner ring. NH type is NJ type with an L type collar ring attached. All of these collar rings are separable, and therefore it is necessary to fix the inner ring axially.
• Can accommodate axial loads in either direction.
• Widely used as the shaft’s fixed-side bearing.