The friction between the rolling element and the rib of the ferrule is small, which is suitable for high-speed rotation. According to whether the ring has ribs, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing has a detachable inner ring and outer ring. Cylindrical roller bearings with no ribs on the inner ring or outer ring, the inner ring and outer ring can move relative to the axial direction, so they can be used as free end bearings. A cylindrical roller bearing with double ribs on one side of the inner ring and outer ring, and a single rib on the other side of the ring, which can withstand a certain degree of axial load in one direction. Steel stamping cages are generally used, or copper alloy car-made solid cages. But there are also some polyamide shaped cages.
Features of cylindrical roller bearings: the rollers and the raceway are in line contact or repaired line contact, the radial load capacity is large, suitable for bearing heavy loads and impact loads; the friction coefficient is small, suitable for high speed, and the limit speed is close to deep groove ball bearings; N type and NU type can move axially, can adapt to the change of the relative position between the shaft and the shell caused by thermal expansion or installation error, and can be used as free end support; the processing requirements for the shaft or seat hole are relatively high, and the outer ring after the bearing is installed The relative deflection of the axis should be strictly controlled to avoid contact stress concentration; the inner ring or outer ring can be separated for easy installation and disassembly.
The cylindrical rollers are in line contact with the raceway, and the radial load capacity is large. It is suitable for bearing heavy loads and shock loads, and is also suitable for high-speed rotation. Cylindrical roller bearing raceways and rolling elements are geometrically shaped. After the improved design, it has a higher bearing capacity. The new structural design of the rib and the end face of the roller not only improves the axial bearing capacity of the bearing, but also improves the lubrication conditions in the contact area between the end face of the roller and the rib, and improves the bearing capacity. Bearing performance.
