1. Product Overview 6309-2RS1/C3GJN single row deep groove ball bearing, standard metric dimension 45×100×25mm. Code Definition 6309: Large heavy-load deep groove ball base model with enlarged steel balls for outstanding radial load capacity 2RS1: Double-sided contact rubber lip seal, fully isolates dust, moisture and fine abrasive particles C3GJN: Custom widened C3 radial clearance matched with exclusive anti-high-temperature oxidation special grease Classic deep groove