The Koyo 2-15/16″ Roller Bearing NJ306C3 is a cylindrical roller bearing made of steel with a bore diameter of 45mm and an outside diameter of 85mm. With a width of 23mm, this bearing is designed for industrial automation and motion control applications. The NJ2209R C3 model from Koyo is known for its reliability and durability, making it a popular choice for various mechanical power transmission systems.