Engineered for fractional-inch applications requiring exceptional durability and environmental defense, the R4A-2RS is a high-quality, single-row deep groove ball bearing. Outfitted with heavy-duty double rubber contact seals (2RS), it provides superior protection against the ingress of dust, dirt, and moisture while securely locking in the factory-applied lubricant. Because the rubber seals maintain direct contact with the inner ring, this bearing offers maximum contamination resistance, making it the ideal solution for 1/4-inch bore mechanisms operating in demanding or exposed environments, such as electric motors, power tools, and automated manufacturing equipment.