1. Product Overview JKOS050 (also written JK0S050) is single row integral sealed tapered roller bearing, standard dimension 50mm inner bore × 80mm outer diameter × 22mm inner ring width, outer ring width 21.5mm. Model Code Explanation: JKOS series: Integrated unitized tapered roller bearing with single side lip rubber seal, pre-assembled inner ring, tapered rollers, polyamide cage and outer ring as one complete set 050: Matched shaft bore size 50mm Tapered roller layout