The SKF 6311-2RS is a deep groove ball bearing with double-sided rubber seals (2RS), featuring a 55mm inner diameter, 120mm outer diameter, and 29mm thickness. Made of GCr15 steel with a pressed steel cage and NBR rubber seals, it is ideal for harsh environments with moisture, dust, and liquid splashes (e.g., marine machinery, chemical equipment, food washing). It handles radial and bidirectional axial loads, offers IP65 protection, low friction, and corrosion resistance.