What Are Cylindrical Roller Bearings?
Cylindrical Roller Bearings are designed to handle radial load at high performance and speed. These Bearings are one of the most suitable options for carrying multiple radial loads. There are some other factors that define the ultimate outcome or performance of this apparatus.
In order to get the maximum results from these, you must optimize their cost, weight, performance, load capacity and durability. As these bearings are used for long term, you have to select the suitable variation according to your need carefully.
How are Cylindrical Roller Bearings different?
The difference between cylindrical roller bearings and other bearing styles is how they use cylinders. Cylindrical rollers have a greater radial load capacity than ball bearings. The cylinders are slightly greater in length than diameter. The cylindrical roller design allows for relatively faster speeds than other styles of roller bearings.
Design Attributes of Cylindrical Roller Bearings
These cylindrical roller bearings have two rings called inner and outer rings that are separated by a set of cylinders. The cylinders support both rings, but also reduce the overall frictional force.
These cylinders are supported by a rib or cage attached with either inner or outer ring depending on the variation. The number of cylinders or rollers used in a Cylindrical Roller Bearing may vary. The effect of increasing this number is increment in overall performance because of the obvious reasons.
Applications of Cylindrical Roller Bearings
The effectiveness and efficiency of these bearings make them an essential part of any machinery that comes with rotating parts. Some examples of usages for these cylindrical roller bearings include, but are not limited to:
- Papermaking Industry
- Electric Motors
- Wind Turbines
Their use is not limited to the above industries because of their high performance and durability even under stressful conditions.
Materials of Cylindrical Roller Bearings
These Bearings are made with several different kinds of material based on their applications and use. Alloy steel is a widely used material because it offers maximum durability to rollers, rings and even the roller cage.
These bearings are made with processed steel to achieve more performance with high speed. As well as more carrying capacity, while sacrificing durability. In some cases, polyamide cages are used.
Roller cylindrical ball bearings are available in a number of different models and configurations with a range of cage designs, dimensions, and side rib applications. Cylindrical roller bearing types are classified according to the following categories:
Single-Row roller cylindrical ball bearings:
These have a single caged cylindrical roller bearing. They are typically available in different models, with or without side ribs, engineered to accommodate for multiple applications. Single-row rolling bearings are typically sub-categorized into N, NU, NJ, NF, NP, and NUP designs. The difference between these classifications lies primarily in the number and location of the side ribs. These contribute to the speed and amount of friction exerted at the time of usage.
Double-row cylindrical roller bearings:
These have an augmented strength and radial capacity due to their double-row configuration. These two-row cylindrical ball bearings are highly rigid and are mainly used for precision machine tools. Double row cylindrical roller bearings are typically sub-categorized into NN and NNU models. The difference between these designs lies primarily in the number and location of the side ribs, which contribute to the speed and amount of friction exerted at the time of usage.
Multi-row Cylindrical roller bearings:
These are built with four or eight roller rows, and are advantageous due to their high radial load capacity, jet lag behind other models in their thrusting capacity. They are primarily aimed at the metal rolling industry due to their ability to carry heavy loads of steel, aluminum and other rolling mills.