Needle Bearings are a type of roller bearing designed to have a high length-to-diameter ratio. They are commonly used in automotive and industrial applications where high radial loads need to be supported with minimal space and weight. Needle bearings are particularly useful for applications where the bearing needs to be compact and lightweight, such as in small electric motors, compressors, and transmissions. Needle Bearing consists of needle-shaped rollers that are held in place by a cage or retainer.