The R156-2RS is a high-precision, ultra-slim imperial ball bearing engineered for micro-mechanical assemblies that demand maximum protection against contaminants. Featuring dual Nitrile Butadiene Rubber (NBR) seals, this bearing ensures the internal raceways remain free from dust, moisture, and debris. Designed for 3/16-inch shafts, the R156-2RS is the ideal choice for high-reliability applications where space is at a premium and maintenance-free operation is a necessity.