1. Product Overview LR604 belongs to LR series yoke-type track roller bearing (cam follower). Single row deep groove ball internal structure with thickened outer ring , designed for outer ring rotating operation, rolling directly on guide rails or cam surfaces. Common variants: LR604:Open type LR604ZZ:Double-sided metal dust shield LR604-2RS:Double contact rubber seal LR604U:R500 crowned outer surface, reduce edge stress and compensate minor misalignment It mainly bears