Experience superior performance with this precision-engineered hybrid ceramic ball bearing. Featuring a chrome steel ring construction with advanced silicon nitride ceramic balls, this 18x30x7mm bearing delivers exceptional durability and wear resistance. The dual rubber seals protect against debris while maintaining optimal grease lubrication. With an 18mm bore, 30mm outer diameter, and 7mm width, this MR18307 RS bearing is ideal for high-performance applications. The nylon cage ensures smooth operation, while the ceramic ball design offers reduced weight and excellent electrical insulation properties. Perfect for demanding mechanical applications where traditional steel bearings may not suffice, these bearings excel in both high-speed and high-load conditions. The combination of chrome steel rings and ceramic balls provides an optimal balance of strength and performance. Ideal for specialized machinery, precision equipment, and high-performance applications where reliability is crucial.