Four Row Cylindrical Roller Bearings

Four row cylindrical roller bearing is line contact bearing. It's load capacity is large and mainly bear radial load. The friction of rolling elements and ring wall is small,suitable for high speed rotation.According to whether the collar has ribs, cylindrical roller bearings can be divided into NU, NJ, NUP, N, NF single row bearing, and NNU, NN double row bearing. The bearing structure is inner ring can outer ring can be separated. Cylindrical roller bearing that the inner ring or outer ring have no ribs,it's inner ring and the outer ring can axially move relatively, so it can be used as a free end bearing. The bearing that in the inner and outer rings there is double rib on one side of and the other side of the collar has single rib can bear certain degree of one direction axial load. Generally use stamping steel cage, or copper alloy machined cage. But there are also a part of the bearing use cage of forming polyamide.