What are the characteristics and uses of roller bearings?

The rolling elements of the roller bearings are radial rolling bearings of cylindrical rollers. Cylindrical rollers and raceways are line contact bearings. Load capacity, mainly bear radial load. The rolling element has little friction with the ferrule rib and is suitable for high speed rotation. According to the ferrule with or without ribs, there are single row bearings such as NU, NJ, NUP, N, NF, and double row bearings of NNU and NN. The bearing is a structure in which the inner ring and the outer ring are separable. Cylindrical roller bearings with no ribs on the inner or outer ring, the inner and outer rings can move relative to the axial direction, so they can be used as free end bearings. A cylindrical roller bearing with a single rib on one side of the inner and outer rings and a single rib on the other side can withstand a certain degree of axial load in one direction. Steel stamping cages or copper alloy cages are generally used. However, some use polyamide shaped cages.


What are the characteristics and uses of roller bearings?
1: The roller and the raceway are in line contact or repaired line contact, and have a large radial load capacity, which is suitable for those subjected to heavy load and impact load.

2: The friction coefficient is small, suitable for those high speeds, and the limit speed is close to the deep groove ball bearing.

3: N-type and NU-type can move axially, can adapt to the change of the relative position of the shaft and the shell caused by thermal expansion or installation error, and can be used as a free end support.

4: The machining requirements for the shaft or the seat hole are relatively high, and the relative deflection of the outer ring axis after the bearing is installed must be strictly controlled to avoid contact stress concentration.

5: The inner ring or the outer ring can be separated to facilitate the installation and disassembly of the bearing.

The main uses are: large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and lifting and transporting machinery.

Both ball bearings and roller bearings are rolling bearings. The simplest one is that the rolling elements are balls, which are steel balls. The other rolling element is a steel column.

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