1. Product Overview 6313-2RS1/C3GJN single row deep groove ball bearing, standard metric dimension 65×140×33mm. Code Definition 6313: Large heavy-duty deep groove ball base model, equipped with extra thickened steel balls for outstanding radial load capacity 2RS1: Double-sided contact rubber lip seal, fully isolate dust, moisture, metal scraps and fine abrasive particles C3GJN: Custom widened C3 radial clearance matched with exclusive high-temperature anti-oxidation special