The 6311LLU is a high-quality deep groove ball bearing, commonly associated with manufacturers like NTN due to its 'LLU' double contact rubber seal designation. This bearing is designed for robust performance in a wide range of industrial and agricultural machinery. It features a 55 mm inner diameter, a 120 mm outer diameter, and a 29 mm width. The double contact rubber seals on both sides provide superior protection against dust, dirt, and moisture, while effectively retaining lubricant, ensuring extended bearing life and reduced maintenance in demanding operating conditions.