23.6mm Conveyor Bearings for Rollers D1DdHBLoading(lb) 25.1mm23.6mm8mm14.5mm9.5mm330 One slow speed unground flanged ball bearings for use with the conveyor rollers (pipes/cylinders), inner diameter bore=8mm, outer diameter=23.6mm, the mechanical drawing and the table above shows all the dimensions, the table shows also the load capacity, good luck building your conveyor system.