A needle roller bearing is a type of roller bearing that uses long and thin cylindrical rollers, known as needle rollers. The design of a needle roller bearing consists of a raceway, which is the inner and outer ring of the bearing, and a cage, which holds the needle rollers in place. The needle rollers have a length-to-diameter ratio, which allows them to handle high radial loads and oscillating motion.

Attributes:
• Has a low coefficient of friction, which helps to generate less heat and operate more efficiently.
• Provided with a 3.2mm lubrication hole on the outer surface of the bearing.

Application:
The needle roller bearing acts as a mechanical component that allows for the smooth and efficient rotation of machinery.