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3 Main Components of Cylindrical Roller Bearing


Cylindrical roller bearings, often known as CRBs, have a straightforward design that puts their cylindrical rollers in direct contact with the bearing’s raceways. They have a high load capacity even when subjected to radial loads predominantly. These bearings are designed to rotate at high speeds because there is a low amount of friction between the rollers and the ring ribs.

Because of the line contact that exists between the rollers and the raceway in cylindrical roller bearings, the bearing’s radial load capability is great. As a result, the bearing is better in terms of its capacity to handle large loads and impact loads. Because the inner ring and the outer ring may be detached from one another, installing and dismounting the device from the cylindrical roller bearing company is very simple and easy.

  1. Depending on whether or not side ribs are used, single-row bearings may be classified as NU, NJ, NUP, N, or NF. Double-row bearings, on the other hand, can be designated as either NNU or NN. The separation of the inner and outer rings is a feature shared by all varieties.
  2. Because the rings of some CRBs used as free-end bearings do not have ribs, the rings can move axially relative to one another. These bearings can withstand some axial stress in one direction provided that both the inner or outer ring has ribs on both sides and the other ring only has a rib on one side.
  3. Bearings with two rows of cylindrical rollers are known for their great radial stiffness, which makes them ideal for use on the main shafts of precision machine tools. In most models, the cages are fabricated using either machined brass or pressed steel; however, some models make use of cages molded from polyamide resin.

The following are the three primary components that normally makeup bearings:

  • Two rings, the inner and the outer one both including raceways.
  • Rolling components – rollers or balls
  • A cage that helps direct motion while also containing and containing the rolling parts.

1. Inner Ring / Outer Ring

In most cases, the inner ring and the outer ring are constructed out of high-purity chrome alloy steel. This material has the required level of hardness in addition to the appropriate level of purity, both of which are critical elements for high load ratings and long service life. The raceways have been made more durable by being ground and sharpened.

Additionally, the production of unique materials such as ceramic and plastic is carried out. Plastics are a useful material in industries such as the automobile industry, where every ounce counts yet they cannot tolerate exceedingly high temperatures. Steel is much heavier than plastics but plastics are much lighter than steel.

2. Rolling Elements

Elements that roll may take the form of needles, spheres, cones, cylinders, or balls. In most cases, they are constructed out of specialized, high-purity chrome alloy steel. Producing unique materials such as ceramic and plastic is also an option.

The rolling components are directed and divided by the cage as they move along the raceways of the rings in which they are contained.

3. Cage

The cage’s job is to keep the rolling components distinct from one another while also directing their travel in the right direction. Steel, brass, and plastic are some of the materials that are used. Machining processes may be used to manufacture cages formed of solid metal, while sheet metal can be pressed into use to generate pressed cages. Similarly, plastic cages may be produced by injection molding or machined from solid plastic.

There is a vast selection of designs, series, varieties, and sizes available for cylindrical roller bearings to choose from. When looking for a cylindrical roller bearing company bearing dimensions are one of the most crucial factors to take into consideration. Because of this, not only the kind of cylindrical roller bearing but also the size that you want will be established.

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