The self-aligning ball bearing with dust cover and sealing ring has been filled with proper amount of lubricating grease during assembly. Before installation, it should not be heated or cleaned. During use, it does not need to be re lubricated. It is suitable for operating temperature between - 30 ℃ and + 120 ℃. Main uses of self aligning ball bearing: it is suitable for precision instruments, low noise motors, automobiles, motorcycles and general machinery. It is the most widely used bearing in the mechanical industry