1-Stud Type Ball transfer NSBT-1-SS 1/4" Threaded Stem Bearing Inner Diameter - 25.4mm the 6015ZZENR outer diameter is

the 6015ZZENR outer diameter is 115mm

the N315MY inner diameter is 75mm

the 22311EXW33 inner diameter is 55mm

UCP320-64 FYH Bearing

1-Stud Type Ball transfer NSBT-1-SS 1/4" Threaded Stem Bearing Inner Diameter - 25.4mm the 6015ZZENR outer diameter isNSBT 1 SS 1 4" Stud Mounted Ball Transfer Unit 1" Main Ball 1 4" Threaded stem Proudly made in the USA NSBT 1 SS 1 4" Ball Transfer Unit, Main Ball is 1" Inch, 1" Main ball rotates on (80) 1 8" support balls, NSBT 1 SS 1 4" stud mounted ball transfer is heavy duty, stud mounted bearing and capable of supporting as many as 75 pounds (per unit). NSBT 1 SS 1 4" Bearing Ball Transfer unit Threaded stem size: 1 4" Inch Ball Material: Nylon Housing