A bearing is typically used to smoothen and lessen friction in between two moving bodies. However, it can be of several types out of which a caged needle is the most simple and straightforward one. Since it only consists of a cage with a needle, they are also very ideal for supporting radial loads in a minimum amount of space. There are several variants in terms of housing, shape, manufacturing processes or materials. For instance, they can be made with fiber resin, brass, and aluminum.
A caged needle bearing consists of two components out of which needle cage is a very important component. It plays an essential role in the proper functioning of a needle roller bearing. These assemblies are very skillfully and accurately built since they guide each needle roller and help them function independently to each other, especially if the housing and shaft are used as raceways.
The cage and small cross-section of needle roller assemblies are particularly used in light and compact constructions. The needle rollers, such as axk bearing are conventionally longer in comparison to their diameter, giving them a high loading capacity in rigid bearing mountings.
Types of needle cages:
Needle cages are essentially of three types which are as follows:
•Single row needle cage.
•Double row needle cage.